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CVE-2022-49959

Estado: AnalizadaMedia (5.5)—

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.

Detalles técnicos trazas, registros y código del informe original
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

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2022-49959",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "b83d23a2a38b1770da0491257ae81d52307f7816",
              "lessThan": "ca54b2bfaab385778e55a9fd33f6c31e7f743b48",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b83d23a2a38b1770da0491257ae81d52307f7816",
              "lessThan": "c0c1c0241917459644326a1a3102207c871ae159",
              "versionType": "git"
            },
            {
              "status": "affected",
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              "lessThan": "a87406f4adee9c53b311d8a1ba2849c69e29a6d0",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "net/openvswitch/datapath.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.15"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.15",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.15.66",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "5.19.8",
              "versionType": "semver",
              "lessThanOrEqual": "5.19.*"
            },
            {
              "status": "unaffected",
              "version": "6.0",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "net/openvswitch/datapath.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-06-18T11:15:23.127",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/a87406f4adee9c53b311d8a1ba2849c69e29a6d0",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c0c1c0241917459644326a1a3102207c871ae159",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ca54b2bfaab385778e55a9fd33f6c31e7f743b48",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-401"
        }
      ]
    }
  ],
  "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()->ovs_dp_change()->ovs_dp_set_upcall_portids()\nallocates array via kmalloc.\nIf for some reason new_vport() fails during ovs_dp_cmd_new()\ndp->upcall_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    [<0000000071bebc9f>] ovs_dp_set_upcall_portids+0x38/0xa0\n    [<000000000187d8bd>] ovs_dp_change+0x63/0xe0\n    [<000000002397e446>] ovs_dp_cmd_new+0x1f0/0x380\n    [<00000000aa06f36e>] genl_family_rcv_msg_doit+0xea/0x150\n    [<000000008f583bc4>] genl_rcv_msg+0xdc/0x1e0\n    [<00000000fa10e377>] netlink_rcv_skb+0x50/0x100\n    [<000000004959cece>] genl_rcv+0x24/0x40\n    [<000000004699ac7f>] netlink_unicast+0x23e/0x360\n    [<00000000c153573e>] netlink_sendmsg+0x24e/0x4b0\n    [<000000006f4aa380>] sock_sendmsg+0x62/0x70\n    [<00000000d0068654>] ____sys_sendmsg+0x230/0x270\n    [<0000000012dacf7d>] ___sys_sendmsg+0x88/0xd0\n    [<0000000011776020>] __sys_sendmsg+0x59/0xa0\n    [<000000002e8f2dc1>] do_syscall_64+0x3b/0x90\n    [<000000003243e7cb>] 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()-&gt;ovs_dp_change()-&gt;ovs_dp_set_upcall_portids() asigna una matriz mediante kmalloc. Si por alguna razón new_vport() falla durante ovs_dp_cmd_new(), se debe liberar dp-&gt;upcall_portids. Se añade la falta de kfree. Ejemplo de Kmemleak: objeto sin referencia 0xffff88800c382500 (tamaño 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: [&lt;0000000071bebc9f&gt;] ovs_dp_set_upcall_portids+0x38/0xa0 [&lt;000000000187d8bd&gt;] ovs_dp_change+0x63/0xe0 [&lt;000000002397e446&gt;] ovs_dp_cmd_new+0x1f0/0x380 [&lt;00000000aa06f36e&gt;] genl_family_rcv_msg_doit+0xea/0x150 [&lt;000000008f583bc4&gt;] genl_rcv_msg+0xdc/0x1e0 [&lt;00000000fa10e377&gt;] netlink_rcv_skb+0x50/0x100 [&lt;000000004959cece&gt;] genl_rcv+0x24/0x40 [&lt;000000004699ac7f&gt;] netlink_unicast+0x23e/0x360 [&lt;00000000c153573e&gt;] netlink_sendmsg+0x24e/0x4b0 [&lt;000000006f4aa380&gt;] sock_sendmsg+0x62/0x70 [&lt;00000000d0068654&gt;] ____sys_sendmsg+0x230/0x270 [&lt;0000000012dacf7d&gt;] ___sys_sendmsg+0x88/0xd0 [&lt;0000000011776020&gt;] __sys_sendmsg+0x59/0xa0 [&lt;000000002e8f2dc1&gt;] do_syscall_64+0x3b/0x90 [&lt;000000003243e7cb&gt;] entry_SYSCALL_64_after_hwframe+0x63/0xcd "
    }
  ],
  "lastModified": "2026-06-17T05:19:37.580",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "92264A00-0618-4F99-926E-A01E06AFEBEC",
              "versionEndExcluding": "5.15.66",
              "versionStartIncluding": "5.15"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "7FEC7656-4CE2-424C-8830-EDB160E701C8",
              "versionEndExcluding": "5.19.8",
              "versionStartIncluding": "5.16"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.0:rc1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E8BD11A3-8643-49B6-BADE-5029A0117325"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.0:rc2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5F0AD220-F6A9-4012-8636-155F1B841FAD"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.0:rc3:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A46498B3-78E1-4623-AAE1-94D29A42BE4E"
            }
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          "operator": "OR"
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  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}