CVE-2022-49959 (GCVE-0-2022-49959)
Vulnerability from cvelistv5
Published
2025-06-18 11:00
Modified
2025-06-18 11:00
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: openvswitch: fix memory leak at failed datapath creation ovs_dp_cmd_new()->ovs_dp_change()->ovs_dp_set_upcall_portids() allocates array via kmalloc. If for some reason new_vport() fails during ovs_dp_cmd_new() dp->upcall_portids must be freed. Add missing kfree. Kmemleak example: unreferenced object 0xffff88800c382500 (size 64): comm "dump_state", pid 323, jiffies 4294955418 (age 104.347s) hex dump (first 32 bytes): 5e c2 79 e4 1f 7a 38 c7 09 21 38 0c 80 88 ff ff ^.y..z8..!8..... 03 00 00 00 0a 00 00 00 14 00 00 00 28 00 00 00 ............(... backtrace: [<0000000071bebc9f>] ovs_dp_set_upcall_portids+0x38/0xa0 [<000000000187d8bd>] ovs_dp_change+0x63/0xe0 [<000000002397e446>] ovs_dp_cmd_new+0x1f0/0x380 [<00000000aa06f36e>] genl_family_rcv_msg_doit+0xea/0x150 [<000000008f583bc4>] genl_rcv_msg+0xdc/0x1e0 [<00000000fa10e377>] netlink_rcv_skb+0x50/0x100 [<000000004959cece>] genl_rcv+0x24/0x40 [<000000004699ac7f>] netlink_unicast+0x23e/0x360 [<00000000c153573e>] netlink_sendmsg+0x24e/0x4b0 [<000000006f4aa380>] sock_sendmsg+0x62/0x70 [<00000000d0068654>] ____sys_sendmsg+0x230/0x270 [<0000000012dacf7d>] ___sys_sendmsg+0x88/0xd0 [<0000000011776020>] __sys_sendmsg+0x59/0xa0 [<000000002e8f2dc1>] do_syscall_64+0x3b/0x90 [<000000003243e7cb>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
References
Impacted products
Vendor Product Version
Linux Linux Version: b83d23a2a38b1770da0491257ae81d52307f7816
Version: b83d23a2a38b1770da0491257ae81d52307f7816
Version: b83d23a2a38b1770da0491257ae81d52307f7816
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/openvswitch/datapath.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ca54b2bfaab385778e55a9fd33f6c31e7f743b48",
              "status": "affected",
              "version": "b83d23a2a38b1770da0491257ae81d52307f7816",
              "versionType": "git"
            },
            {
              "lessThan": "c0c1c0241917459644326a1a3102207c871ae159",
              "status": "affected",
              "version": "b83d23a2a38b1770da0491257ae81d52307f7816",
              "versionType": "git"
            },
            {
              "lessThan": "a87406f4adee9c53b311d8a1ba2849c69e29a6d0",
              "status": "affected",
              "version": "b83d23a2a38b1770da0491257ae81d52307f7816",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/openvswitch/datapath.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.15"
            },
            {
              "lessThan": "5.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.66",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.19.*",
              "status": "unaffected",
              "version": "5.19.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.66",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19.8",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nopenvswitch: fix memory leak at failed datapath creation\n\novs_dp_cmd_new()-\u003eovs_dp_change()-\u003eovs_dp_set_upcall_portids()\nallocates array via kmalloc.\nIf for some reason new_vport() fails during ovs_dp_cmd_new()\ndp-\u003eupcall_portids must be freed.\nAdd missing kfree.\n\nKmemleak example:\nunreferenced object 0xffff88800c382500 (size 64):\n  comm \"dump_state\", pid 323, jiffies 4294955418 (age 104.347s)\n  hex dump (first 32 bytes):\n    5e c2 79 e4 1f 7a 38 c7 09 21 38 0c 80 88 ff ff  ^.y..z8..!8.....\n    03 00 00 00 0a 00 00 00 14 00 00 00 28 00 00 00  ............(...\n  backtrace:\n    [\u003c0000000071bebc9f\u003e] ovs_dp_set_upcall_portids+0x38/0xa0\n    [\u003c000000000187d8bd\u003e] ovs_dp_change+0x63/0xe0\n    [\u003c000000002397e446\u003e] ovs_dp_cmd_new+0x1f0/0x380\n    [\u003c00000000aa06f36e\u003e] genl_family_rcv_msg_doit+0xea/0x150\n    [\u003c000000008f583bc4\u003e] genl_rcv_msg+0xdc/0x1e0\n    [\u003c00000000fa10e377\u003e] netlink_rcv_skb+0x50/0x100\n    [\u003c000000004959cece\u003e] genl_rcv+0x24/0x40\n    [\u003c000000004699ac7f\u003e] netlink_unicast+0x23e/0x360\n    [\u003c00000000c153573e\u003e] netlink_sendmsg+0x24e/0x4b0\n    [\u003c000000006f4aa380\u003e] sock_sendmsg+0x62/0x70\n    [\u003c00000000d0068654\u003e] ____sys_sendmsg+0x230/0x270\n    [\u003c0000000012dacf7d\u003e] ___sys_sendmsg+0x88/0xd0\n    [\u003c0000000011776020\u003e] __sys_sendmsg+0x59/0xa0\n    [\u003c000000002e8f2dc1\u003e] do_syscall_64+0x3b/0x90\n    [\u003c000000003243e7cb\u003e] entry_SYSCALL_64_after_hwframe+0x63/0xcd"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-06-18T11:00:20.749Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/ca54b2bfaab385778e55a9fd33f6c31e7f743b48"
        },
        {
          "url": "https://git.kernel.org/stable/c/c0c1c0241917459644326a1a3102207c871ae159"
        },
        {
          "url": "https://git.kernel.org/stable/c/a87406f4adee9c53b311d8a1ba2849c69e29a6d0"
        }
      ],
      "title": "openvswitch: fix memory leak at failed datapath creation",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49959",
    "datePublished": "2025-06-18T11:00:20.749Z",
    "dateReserved": "2025-06-18T10:57:27.383Z",
    "dateUpdated": "2025-06-18T11:00:20.749Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49959\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-06-18T11:15:23.127\",\"lastModified\":\"2025-06-18T13:46:52.973\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nopenvswitch: fix memory leak at failed datapath creation\\n\\novs_dp_cmd_new()-\u003eovs_dp_change()-\u003eovs_dp_set_upcall_portids()\\nallocates array via kmalloc.\\nIf for some reason new_vport() fails during ovs_dp_cmd_new()\\ndp-\u003eupcall_portids must be freed.\\nAdd missing kfree.\\n\\nKmemleak example:\\nunreferenced object 0xffff88800c382500 (size 64):\\n  comm \\\"dump_state\\\", pid 323, jiffies 4294955418 (age 104.347s)\\n  hex dump (first 32 bytes):\\n    5e c2 79 e4 1f 7a 38 c7 09 21 38 0c 80 88 ff ff  ^.y..z8..!8.....\\n    03 00 00 00 0a 00 00 00 14 00 00 00 28 00 00 00  ............(...\\n  backtrace:\\n    [\u003c0000000071bebc9f\u003e] ovs_dp_set_upcall_portids+0x38/0xa0\\n    [\u003c000000000187d8bd\u003e] ovs_dp_change+0x63/0xe0\\n    [\u003c000000002397e446\u003e] ovs_dp_cmd_new+0x1f0/0x380\\n    [\u003c00000000aa06f36e\u003e] genl_family_rcv_msg_doit+0xea/0x150\\n    [\u003c000000008f583bc4\u003e] genl_rcv_msg+0xdc/0x1e0\\n    [\u003c00000000fa10e377\u003e] netlink_rcv_skb+0x50/0x100\\n    [\u003c000000004959cece\u003e] genl_rcv+0x24/0x40\\n    [\u003c000000004699ac7f\u003e] netlink_unicast+0x23e/0x360\\n    [\u003c00000000c153573e\u003e] netlink_sendmsg+0x24e/0x4b0\\n    [\u003c000000006f4aa380\u003e] sock_sendmsg+0x62/0x70\\n    [\u003c00000000d0068654\u003e] ____sys_sendmsg+0x230/0x270\\n    [\u003c0000000012dacf7d\u003e] ___sys_sendmsg+0x88/0xd0\\n    [\u003c0000000011776020\u003e] __sys_sendmsg+0x59/0xa0\\n    [\u003c000000002e8f2dc1\u003e] do_syscall_64+0x3b/0x90\\n    [\u003c000000003243e7cb\u003e] entry_SYSCALL_64_after_hwframe+0x63/0xcd\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: openvswitch: se corrige una fuga de memoria al crear una ruta de datos fallida. ovs_dp_cmd_new()-\u0026gt;ovs_dp_change()-\u0026gt;ovs_dp_set_upcall_portids() asigna una matriz mediante kmalloc. Si por alguna raz\u00f3n new_vport() falla durante ovs_dp_cmd_new(), se debe liberar dp-\u0026gt;upcall_portids. Se a\u00f1ade la falta de kfree. Ejemplo de Kmemleak: objeto sin referencia 0xffff88800c382500 (tama\u00f1o 64): comm \\\"dump_state\\\", pid 323, jiffies 4294955418 (edad 104.347s) volcado hexadecimal (primeros 32 bytes): 5e c2 79 e4 1f 7a 38 c7 09 21 38 0c 80 88 ff ff ^.y..z8..!8..... 03 00 00 00 0a 00 00 00 14 00 00 00 28 00 00 00 ............(...  backtrace: [\u0026lt;0000000071bebc9f\u0026gt;] ovs_dp_set_upcall_portids+0x38/0xa0 [\u0026lt;000000000187d8bd\u0026gt;] ovs_dp_change+0x63/0xe0 [\u0026lt;000000002397e446\u0026gt;] ovs_dp_cmd_new+0x1f0/0x380 [\u0026lt;00000000aa06f36e\u0026gt;] genl_family_rcv_msg_doit+0xea/0x150 [\u0026lt;000000008f583bc4\u0026gt;] genl_rcv_msg+0xdc/0x1e0 [\u0026lt;00000000fa10e377\u0026gt;] netlink_rcv_skb+0x50/0x100 [\u0026lt;000000004959cece\u0026gt;] genl_rcv+0x24/0x40 [\u0026lt;000000004699ac7f\u0026gt;] netlink_unicast+0x23e/0x360 [\u0026lt;00000000c153573e\u0026gt;] netlink_sendmsg+0x24e/0x4b0 [\u0026lt;000000006f4aa380\u0026gt;] sock_sendmsg+0x62/0x70 [\u0026lt;00000000d0068654\u0026gt;] ____sys_sendmsg+0x230/0x270 [\u0026lt;0000000012dacf7d\u0026gt;] ___sys_sendmsg+0x88/0xd0 [\u0026lt;0000000011776020\u0026gt;] __sys_sendmsg+0x59/0xa0 [\u0026lt;000000002e8f2dc1\u0026gt;] do_syscall_64+0x3b/0x90 [\u0026lt;000000003243e7cb\u0026gt;] entry_SYSCALL_64_after_hwframe+0x63/0xcd \"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/a87406f4adee9c53b311d8a1ba2849c69e29a6d0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c0c1c0241917459644326a1a3102207c871ae159\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ca54b2bfaab385778e55a9fd33f6c31e7f743b48\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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