CVE-2021-47291 (GCVE-0-2021-47291)
Vulnerability from cvelistv5
Published
2024-05-21 14:35
Modified
2025-05-04 07:07
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ipv6: fix another slab-out-of-bounds in fib6_nh_flush_exceptions While running the self-tests on a KASAN enabled kernel, I observed a slab-out-of-bounds splat very similar to the one reported in commit 821bbf79fe46 ("ipv6: Fix KASAN: slab-out-of-bounds Read in fib6_nh_flush_exceptions"). We additionally need to take care of fib6_metrics initialization failure when the caller provides an nh. The fix is similar, explicitly free the route instead of calling fib6_info_release on a half-initialized object.
References
Impacted products
Vendor Product Version
Linux Linux Version: f88d8ea67fbdbac7a64bfa6ed9a2ba27bb822f74
Version: f88d8ea67fbdbac7a64bfa6ed9a2ba27bb822f74
Version: f88d8ea67fbdbac7a64bfa6ed9a2ba27bb822f74
Version: f88d8ea67fbdbac7a64bfa6ed9a2ba27bb822f74
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T05:32:08.000Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/830251361425c5be044db4d826aaf304ea3d14c6"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/ce8fafb68051fba52546f8bbe8621f7641683680"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/115784bcccf135c3a3548098153413d76f16aae0"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/8fb4792f091e608a0a1d353dfdf07ef55a719db5"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-47291",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-08-19T18:51:27.837598Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-08-19T18:52:14.586Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ipv6/route.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "830251361425c5be044db4d826aaf304ea3d14c6",
              "status": "affected",
              "version": "f88d8ea67fbdbac7a64bfa6ed9a2ba27bb822f74",
              "versionType": "git"
            },
            {
              "lessThan": "ce8fafb68051fba52546f8bbe8621f7641683680",
              "status": "affected",
              "version": "f88d8ea67fbdbac7a64bfa6ed9a2ba27bb822f74",
              "versionType": "git"
            },
            {
              "lessThan": "115784bcccf135c3a3548098153413d76f16aae0",
              "status": "affected",
              "version": "f88d8ea67fbdbac7a64bfa6ed9a2ba27bb822f74",
              "versionType": "git"
            },
            {
              "lessThan": "8fb4792f091e608a0a1d353dfdf07ef55a719db5",
              "status": "affected",
              "version": "f88d8ea67fbdbac7a64bfa6ed9a2ba27bb822f74",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/ipv6/route.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.3"
            },
            {
              "lessThan": "5.3",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.136",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.54",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.13.*",
              "status": "unaffected",
              "version": "5.13.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.14",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.136",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.54",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.13.6",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.14",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: fix another slab-out-of-bounds in fib6_nh_flush_exceptions\n\nWhile running the self-tests on a KASAN enabled kernel, I observed a\nslab-out-of-bounds splat very similar to the one reported in\ncommit 821bbf79fe46 (\"ipv6: Fix KASAN: slab-out-of-bounds Read in\n fib6_nh_flush_exceptions\").\n\nWe additionally need to take care of fib6_metrics initialization\nfailure when the caller provides an nh.\n\nThe fix is similar, explicitly free the route instead of calling\nfib6_info_release on a half-initialized object."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T07:07:59.598Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/830251361425c5be044db4d826aaf304ea3d14c6"
        },
        {
          "url": "https://git.kernel.org/stable/c/ce8fafb68051fba52546f8bbe8621f7641683680"
        },
        {
          "url": "https://git.kernel.org/stable/c/115784bcccf135c3a3548098153413d76f16aae0"
        },
        {
          "url": "https://git.kernel.org/stable/c/8fb4792f091e608a0a1d353dfdf07ef55a719db5"
        }
      ],
      "title": "ipv6: fix another slab-out-of-bounds in fib6_nh_flush_exceptions",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47291",
    "datePublished": "2024-05-21T14:35:16.071Z",
    "dateReserved": "2024-05-21T13:27:52.130Z",
    "dateUpdated": "2025-05-04T07:07:59.598Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47291\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-21T15:15:17.100\",\"lastModified\":\"2024-12-23T16:47:57.030\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nipv6: fix another slab-out-of-bounds in fib6_nh_flush_exceptions\\n\\nWhile running the self-tests on a KASAN enabled kernel, I observed a\\nslab-out-of-bounds splat very similar to the one reported in\\ncommit 821bbf79fe46 (\\\"ipv6: Fix KASAN: slab-out-of-bounds Read in\\n fib6_nh_flush_exceptions\\\").\\n\\nWe additionally need to take care of fib6_metrics initialization\\nfailure when the caller provides an nh.\\n\\nThe fix is similar, explicitly free the route instead of calling\\nfib6_info_release on a half-initialized object.\"},{\"lang\":\"es\",\"value\":\" En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: ipv6: corrige otra slab fuera de los l\u00edmites en fib6_nh_flush_exceptions. Mientras ejecutaba las autopruebas en un kernel habilitado para KASAN, observ\u00e9 una slab fuera de los l\u00edmites muy similar al informado en la confirmaci\u00f3n 821bbf79fe46 (\\\"ipv6: Fix KASAN: slab-out-of-bounds Read in fib6_nh_flush_exceptions\\\"). Adem\u00e1s, debemos ocuparnos del error de inicializaci\u00f3n de fib6_metrics cuando la persona que llama proporciona un nh. La soluci\u00f3n es similar: libera expl\u00edcitamente la ruta en lugar de llamar a fib6_info_release en un objeto medio inicializado.\"}],\"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:N/A:H\",\"baseScore\":7.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.2}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-125\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.3\",\"versionEndExcluding\":\"5.4.136\",\"matchCriteriaId\":\"CF5BD040-953A-4682-81D2-AC87F815A1D6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.54\",\"matchCriteriaId\":\"1BD5A2EE-859F-40FC-BDAC-167AAE37C870\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.13.6\",\"matchCriteriaId\":\"512C22FC-1524-4E6F-9E62-4F4B7B6E0576\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.14:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"71268287-21A8-4488-AA4F-23C473153131\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.14:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"23B9E5C6-FAB5-4A02-9E39-27C8787B0991\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/115784bcccf135c3a3548098153413d76f16aae0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/830251361425c5be044db4d826aaf304ea3d14c6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8fb4792f091e608a0a1d353dfdf07ef55a719db5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ce8fafb68051fba52546f8bbe8621f7641683680\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/115784bcccf135c3a3548098153413d76f16aae0\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/830251361425c5be044db4d826aaf304ea3d14c6\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8fb4792f091e608a0a1d353dfdf07ef55a719db5\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ce8fafb68051fba52546f8bbe8621f7641683680\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/830251361425c5be044db4d826aaf304ea3d14c6\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/ce8fafb68051fba52546f8bbe8621f7641683680\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/115784bcccf135c3a3548098153413d76f16aae0\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/8fb4792f091e608a0a1d353dfdf07ef55a719db5\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T05:32:08.000Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47291\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-08-19T18:51:27.837598Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-08-19T18:52:11.686Z\"}}], \"cna\": {\"title\": \"ipv6: fix another slab-out-of-bounds in fib6_nh_flush_exceptions\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"f88d8ea67fbd\", \"lessThan\": \"830251361425\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"f88d8ea67fbd\", \"lessThan\": \"ce8fafb68051\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"f88d8ea67fbd\", \"lessThan\": \"115784bcccf1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"f88d8ea67fbd\", \"lessThan\": \"8fb4792f091e\", \"versionType\": \"git\"}], \"programFiles\": [\"net/ipv6/route.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.3\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.3\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.136\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.54\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.13.6\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.13.*\"}, {\"status\": \"unaffected\", \"version\": \"5.14\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/ipv6/route.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/830251361425c5be044db4d826aaf304ea3d14c6\"}, {\"url\": \"https://git.kernel.org/stable/c/ce8fafb68051fba52546f8bbe8621f7641683680\"}, {\"url\": \"https://git.kernel.org/stable/c/115784bcccf135c3a3548098153413d76f16aae0\"}, {\"url\": \"https://git.kernel.org/stable/c/8fb4792f091e608a0a1d353dfdf07ef55a719db5\"}], \"x_generator\": {\"engine\": \"bippy-9e1c9544281a\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nipv6: fix another slab-out-of-bounds in fib6_nh_flush_exceptions\\n\\nWhile running the self-tests on a KASAN enabled kernel, I observed a\\nslab-out-of-bounds splat very similar to the one reported in\\ncommit 821bbf79fe46 (\\\"ipv6: Fix KASAN: slab-out-of-bounds Read in\\n fib6_nh_flush_exceptions\\\").\\n\\nWe additionally need to take care of fib6_metrics initialization\\nfailure when the caller provides an nh.\\n\\nThe fix is similar, explicitly free the route instead of calling\\nfib6_info_release on a half-initialized object.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-11-04T12:03:05.568Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47291\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-11-04T12:03:05.568Z\", \"dateReserved\": \"2024-05-21T13:27:52.130Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-21T14:35:16.071Z\", \"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.