CVE-2021-47261 (GCVE-0-2021-47261)
Vulnerability from cvelistv5
Published
2024-05-21 14:19
Modified
2025-05-04 07:07
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: IB/mlx5: Fix initializing CQ fragments buffer The function init_cq_frag_buf() can be called to initialize the current CQ fragments buffer cq->buf, or the temporary cq->resize_buf that is filled during CQ resize operation. However, the offending commit started to use function get_cqe() for getting the CQEs, the issue with this change is that get_cqe() always returns CQEs from cq->buf, which leads us to initialize the wrong buffer, and in case of enlarging the CQ we try to access elements beyond the size of the current cq->buf and eventually hit a kernel panic. [exception RIP: init_cq_frag_buf+103] [ffff9f799ddcbcd8] mlx5_ib_resize_cq at ffffffffc0835d60 [mlx5_ib] [ffff9f799ddcbdb0] ib_resize_cq at ffffffffc05270df [ib_core] [ffff9f799ddcbdc0] llt_rdma_setup_qp at ffffffffc0a6a712 [llt] [ffff9f799ddcbe10] llt_rdma_cc_event_action at ffffffffc0a6b411 [llt] [ffff9f799ddcbe98] llt_rdma_client_conn_thread at ffffffffc0a6bb75 [llt] [ffff9f799ddcbec8] kthread at ffffffffa66c5da1 [ffff9f799ddcbf50] ret_from_fork_nospec_begin at ffffffffa6d95ddd Fix it by getting the needed CQE by calling mlx5_frag_buf_get_wqe() that takes the correct source buffer as a parameter.
References
Impacted products
Vendor Product Version
Linux Linux Version: 388ca8be00370db132464e27f745b8a0add19fcb
Version: 388ca8be00370db132464e27f745b8a0add19fcb
Version: 388ca8be00370db132464e27f745b8a0add19fcb
Version: 388ca8be00370db132464e27f745b8a0add19fcb
Version: 388ca8be00370db132464e27f745b8a0add19fcb
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-47261",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-05-21T18:50:22.252363Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-06-04T17:14:42.110Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T05:32:07.928Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/1ec2dcd680c71d0d36fa25638b327a468babd5c9"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/e3ecd9c09fcc10cf6b2bc67e2990c397c40a8c26"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/91f7fdc4cc10542ca1045c06aad23365f0d067e0"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/3e670c54eda238cb8a1ea93538a79ae89285c1c4"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/2ba0aa2feebda680ecfc3c552e867cf4d1b05a3a"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/mlx5/cq.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "1ec2dcd680c71d0d36fa25638b327a468babd5c9",
              "status": "affected",
              "version": "388ca8be00370db132464e27f745b8a0add19fcb",
              "versionType": "git"
            },
            {
              "lessThan": "e3ecd9c09fcc10cf6b2bc67e2990c397c40a8c26",
              "status": "affected",
              "version": "388ca8be00370db132464e27f745b8a0add19fcb",
              "versionType": "git"
            },
            {
              "lessThan": "91f7fdc4cc10542ca1045c06aad23365f0d067e0",
              "status": "affected",
              "version": "388ca8be00370db132464e27f745b8a0add19fcb",
              "versionType": "git"
            },
            {
              "lessThan": "3e670c54eda238cb8a1ea93538a79ae89285c1c4",
              "status": "affected",
              "version": "388ca8be00370db132464e27f745b8a0add19fcb",
              "versionType": "git"
            },
            {
              "lessThan": "2ba0aa2feebda680ecfc3c552e867cf4d1b05a3a",
              "status": "affected",
              "version": "388ca8be00370db132464e27f745b8a0add19fcb",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/mlx5/cq.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.17"
            },
            {
              "lessThan": "4.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.195",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.126",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.44",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.12.*",
              "status": "unaffected",
              "version": "5.12.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.13",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.195",
                  "versionStartIncluding": "4.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.126",
                  "versionStartIncluding": "4.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.44",
                  "versionStartIncluding": "4.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.12.11",
                  "versionStartIncluding": "4.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.13",
                  "versionStartIncluding": "4.17",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nIB/mlx5: Fix initializing CQ fragments buffer\n\nThe function init_cq_frag_buf() can be called to initialize the current CQ\nfragments buffer cq-\u003ebuf, or the temporary cq-\u003eresize_buf that is filled\nduring CQ resize operation.\n\nHowever, the offending commit started to use function get_cqe() for\ngetting the CQEs, the issue with this change is that get_cqe() always\nreturns CQEs from cq-\u003ebuf, which leads us to initialize the wrong buffer,\nand in case of enlarging the CQ we try to access elements beyond the size\nof the current cq-\u003ebuf and eventually hit a kernel panic.\n\n [exception RIP: init_cq_frag_buf+103]\n  [ffff9f799ddcbcd8] mlx5_ib_resize_cq at ffffffffc0835d60 [mlx5_ib]\n  [ffff9f799ddcbdb0] ib_resize_cq at ffffffffc05270df [ib_core]\n  [ffff9f799ddcbdc0] llt_rdma_setup_qp at ffffffffc0a6a712 [llt]\n  [ffff9f799ddcbe10] llt_rdma_cc_event_action at ffffffffc0a6b411 [llt]\n  [ffff9f799ddcbe98] llt_rdma_client_conn_thread at ffffffffc0a6bb75 [llt]\n  [ffff9f799ddcbec8] kthread at ffffffffa66c5da1\n  [ffff9f799ddcbf50] ret_from_fork_nospec_begin at ffffffffa6d95ddd\n\nFix it by getting the needed CQE by calling mlx5_frag_buf_get_wqe() that\ntakes the correct source buffer as a parameter."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T07:07:26.307Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/1ec2dcd680c71d0d36fa25638b327a468babd5c9"
        },
        {
          "url": "https://git.kernel.org/stable/c/e3ecd9c09fcc10cf6b2bc67e2990c397c40a8c26"
        },
        {
          "url": "https://git.kernel.org/stable/c/91f7fdc4cc10542ca1045c06aad23365f0d067e0"
        },
        {
          "url": "https://git.kernel.org/stable/c/3e670c54eda238cb8a1ea93538a79ae89285c1c4"
        },
        {
          "url": "https://git.kernel.org/stable/c/2ba0aa2feebda680ecfc3c552e867cf4d1b05a3a"
        }
      ],
      "title": "IB/mlx5: Fix initializing CQ fragments buffer",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47261",
    "datePublished": "2024-05-21T14:19:54.025Z",
    "dateReserved": "2024-05-21T13:27:52.126Z",
    "dateUpdated": "2025-05-04T07:07:26.307Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47261\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-21T15:15:14.770\",\"lastModified\":\"2025-04-30T15:03:53.077\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nIB/mlx5: Fix initializing CQ fragments buffer\\n\\nThe function init_cq_frag_buf() can be called to initialize the current CQ\\nfragments buffer cq-\u003ebuf, or the temporary cq-\u003eresize_buf that is filled\\nduring CQ resize operation.\\n\\nHowever, the offending commit started to use function get_cqe() for\\ngetting the CQEs, the issue with this change is that get_cqe() always\\nreturns CQEs from cq-\u003ebuf, which leads us to initialize the wrong buffer,\\nand in case of enlarging the CQ we try to access elements beyond the size\\nof the current cq-\u003ebuf and eventually hit a kernel panic.\\n\\n [exception RIP: init_cq_frag_buf+103]\\n  [ffff9f799ddcbcd8] mlx5_ib_resize_cq at ffffffffc0835d60 [mlx5_ib]\\n  [ffff9f799ddcbdb0] ib_resize_cq at ffffffffc05270df [ib_core]\\n  [ffff9f799ddcbdc0] llt_rdma_setup_qp at ffffffffc0a6a712 [llt]\\n  [ffff9f799ddcbe10] llt_rdma_cc_event_action at ffffffffc0a6b411 [llt]\\n  [ffff9f799ddcbe98] llt_rdma_client_conn_thread at ffffffffc0a6bb75 [llt]\\n  [ffff9f799ddcbec8] kthread at ffffffffa66c5da1\\n  [ffff9f799ddcbf50] ret_from_fork_nospec_begin at ffffffffa6d95ddd\\n\\nFix it by getting the needed CQE by calling mlx5_frag_buf_get_wqe() that\\ntakes the correct source buffer as a parameter.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: IB/mlx5: Correcci\u00f3n al inicializar el b\u00fafer de fragmentos CQ. Se puede llamar a la funci\u00f3n init_cq_frag_buf() para inicializar el b\u00fafer de fragmentos CQ actual cq-\u0026gt;buf, o el cq-\u0026gt;resize_buf temporal que es rellenado durante la operaci\u00f3n de cambio de tama\u00f1o de CQ. Sin embargo, la confirmaci\u00f3n infractora comenz\u00f3 a usar la funci\u00f3n get_cqe() para obtener los CQE, el problema con este cambio es que get_cqe() siempre devuelve CQE desde cq-\u0026gt;buf, lo que nos lleva a inicializar el b\u00fafer incorrecto y, en caso de ampliarlo, En el CQ intentamos acceder a elementos m\u00e1s all\u00e1 del tama\u00f1o del cq-\u0026gt;buf actual y finalmente entramos en p\u00e1nico en el kernel. [excepci\u00f3n RIP: init_cq_frag_buf+103] [ffff9f799ddcbcd8] mlx5_ib_resize_cq en fffffffc0835d60 [mlx5_ib] [ffff9f799ddcbdb0] ib_resize_cq en fffffffc05270df [ib_core] [ffff9f799ddcbdc0] _rdma_setup_qp en ffffffffc0a6a712 [llt] [ffff9f799ddcbe10] llt_rdma_cc_event_action en ffffffffc0a6b411 [llt] [ffff9f799ddcbe98] llt_rdma_client_conn_thread en ffffffffc0a6bb75 [llt] [ffff9f799ddcbec8] kthread en ffffffffa66c5da1 [ffff9f799ddcbf50] ret_from_fork_nospec_begin en ffffffffa6d95ddd Arr\u00e9glelo obteniendo el CQE necesario llamando a mlx5_frag_buf_get_wqe() que toma el b\u00fafer de origen correcto como par\u00e1metro.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-706\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.17\",\"versionEndExcluding\":\"4.19.195\",\"matchCriteriaId\":\"5017B18F-E493-4424-A351-A210614CF65E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.20\",\"versionEndExcluding\":\"5.4.126\",\"matchCriteriaId\":\"876275F9-BEC7-40E8-9D7F-A20729A4A4FF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.44\",\"matchCriteriaId\":\"DA547B08-9D25-467B-AD0D-8460FE4EE70D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.12.11\",\"matchCriteriaId\":\"F914A757-FAFD-407E-9031-21F66635D5EA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"0CBAD0FC-C281-4666-AB2F-F8E6E1165DF7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"96AC23B2-D46A-49D9-8203-8E1BEDCA8532\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"DA610E30-717C-4700-9F77-A3C9244F3BFD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.13:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"1ECD33F5-85BE-430B-8F86-8D7BD560311D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.13:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"CF351855-2437-4CF5-AD7C-BDFA51F27683\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1ec2dcd680c71d0d36fa25638b327a468babd5c9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/2ba0aa2feebda680ecfc3c552e867cf4d1b05a3a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3e670c54eda238cb8a1ea93538a79ae89285c1c4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/91f7fdc4cc10542ca1045c06aad23365f0d067e0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e3ecd9c09fcc10cf6b2bc67e2990c397c40a8c26\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/1ec2dcd680c71d0d36fa25638b327a468babd5c9\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/2ba0aa2feebda680ecfc3c552e867cf4d1b05a3a\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3e670c54eda238cb8a1ea93538a79ae89285c1c4\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/91f7fdc4cc10542ca1045c06aad23365f0d067e0\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e3ecd9c09fcc10cf6b2bc67e2990c397c40a8c26\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/1ec2dcd680c71d0d36fa25638b327a468babd5c9\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/e3ecd9c09fcc10cf6b2bc67e2990c397c40a8c26\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/91f7fdc4cc10542ca1045c06aad23365f0d067e0\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/3e670c54eda238cb8a1ea93538a79ae89285c1c4\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/2ba0aa2feebda680ecfc3c552e867cf4d1b05a3a\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T05:32:07.928Z\"}}, {\"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47261\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-05-21T18:50:22.252363Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-05-23T19:01:25.507Z\"}, \"title\": \"CISA ADP Vulnrichment\"}], \"cna\": {\"title\": \"IB/mlx5: Fix initializing CQ fragments buffer\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"388ca8be0037\", \"lessThan\": \"1ec2dcd680c7\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"388ca8be0037\", \"lessThan\": \"e3ecd9c09fcc\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"388ca8be0037\", \"lessThan\": \"91f7fdc4cc10\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"388ca8be0037\", \"lessThan\": \"3e670c54eda2\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"388ca8be0037\", \"lessThan\": \"2ba0aa2feebd\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/infiniband/hw/mlx5/cq.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.17\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.17\", \"versionType\": \"custom\"}, {\"status\": \"unaffected\", \"version\": \"4.19.195\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.126\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.44\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.12.11\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"5.12.*\"}, {\"status\": \"unaffected\", \"version\": \"5.13\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/infiniband/hw/mlx5/cq.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/1ec2dcd680c71d0d36fa25638b327a468babd5c9\"}, {\"url\": \"https://git.kernel.org/stable/c/e3ecd9c09fcc10cf6b2bc67e2990c397c40a8c26\"}, {\"url\": \"https://git.kernel.org/stable/c/91f7fdc4cc10542ca1045c06aad23365f0d067e0\"}, {\"url\": \"https://git.kernel.org/stable/c/3e670c54eda238cb8a1ea93538a79ae89285c1c4\"}, {\"url\": \"https://git.kernel.org/stable/c/2ba0aa2feebda680ecfc3c552e867cf4d1b05a3a\"}], \"x_generator\": {\"engine\": \"bippy-a5840b7849dd\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nIB/mlx5: Fix initializing CQ fragments buffer\\n\\nThe function init_cq_frag_buf() can be called to initialize the current CQ\\nfragments buffer cq-\u003ebuf, or the temporary cq-\u003eresize_buf that is filled\\nduring CQ resize operation.\\n\\nHowever, the offending commit started to use function get_cqe() for\\ngetting the CQEs, the issue with this change is that get_cqe() always\\nreturns CQEs from cq-\u003ebuf, which leads us to initialize the wrong buffer,\\nand in case of enlarging the CQ we try to access elements beyond the size\\nof the current cq-\u003ebuf and eventually hit a kernel panic.\\n\\n [exception RIP: init_cq_frag_buf+103]\\n  [ffff9f799ddcbcd8] mlx5_ib_resize_cq at ffffffffc0835d60 [mlx5_ib]\\n  [ffff9f799ddcbdb0] ib_resize_cq at ffffffffc05270df [ib_core]\\n  [ffff9f799ddcbdc0] llt_rdma_setup_qp at ffffffffc0a6a712 [llt]\\n  [ffff9f799ddcbe10] llt_rdma_cc_event_action at ffffffffc0a6b411 [llt]\\n  [ffff9f799ddcbe98] llt_rdma_client_conn_thread at ffffffffc0a6bb75 [llt]\\n  [ffff9f799ddcbec8] kthread at ffffffffa66c5da1\\n  [ffff9f799ddcbf50] ret_from_fork_nospec_begin at ffffffffa6d95ddd\\n\\nFix it by getting the needed CQE by calling mlx5_frag_buf_get_wqe() that\\ntakes the correct source buffer as a parameter.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-05-29T05:04:52.370Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47261\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-08-04T05:32:07.928Z\", \"dateReserved\": \"2024-05-21T13:27:52.126Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-21T14:19:54.025Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.