CVE-2026-64531

🗓️ 27 Jul 2026 06:32:32Reported by LinuxType

Open vSwitch rejects oversized nested action attributes to enforce nla_len limits and release resources.

Reporter	Title	Published	Views	Family All 7
ATTACKERKB	CVE-2026-64531	27 Jul 202606:32	–	attackerkb
Cvelist	CVE-2026-64531 net: openvswitch: reject oversized nested action attrs	27 Jul 202606:32	–	cvelist
Debian CVE	CVE-2026-64531	27 Jul 202606:32	–	debiancve
EUVD	EUVD-2026-49109	27 Jul 202609:31	–	euvd
NVD	CVE-2026-64531	27 Jul 202608:16	–	nvd
OSV	DEBIAN-CVE-2026-64531	27 Jul 202608:48	–	osv
Positive Technologies	PT-2026-64855	27 Jul 202600:00	–	ptsecurity

Vulners

CNA

Node

linux linux_kernelRange5.15.180–5.15.212

linux linux_kernelRange6.1.132–6.1.178

linux linux_kernelRange6.6.84–6.6.145

linux linux_kernelRange6.12.20–6.12.97

linux linux_kernelRange6.13.8–6.14

linux linux_kernelRange6.14–5.15.212

linux linux_kernelRange5.16.0–6.1.178

linux linux_kernelRange6.2.0–6.6.145

linux linux_kernelRange6.7.0–6.12.97

linux linux_kernelRange6.13.0–6.18.40

linux linux_kernelRange6.19.0–7.1.5

linux linux_kernelRange7.2.0–7.2-rc4

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/openvswitch/flow_netlink.c"
    ],
    "versions": [
      {
        "version": "057dbc5b72e9fcac439cd561c3a539b8a0edeb92",
        "lessThan": "ab855641241387db062a5e41d9ad6b8561542572",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "2532adbfe917c0e71dba2650ffc6efe396314c87",
        "lessThan": "c66bd2626c2764f23764ff0f8277f44a9cfe8349",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "4b1a0ee6164c7204c68ab5a9c48c07bfe8852485",
        "lessThan": "d573250d228401f707f4dbc09d11227a6215ee5f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e6610f9c08b4c04cf7949c10fc246c071d00e935",
        "lessThan": "f1efff8858403191361a01269c6fe8dd7f55a385",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a1e64addf3ff9257b45b78bc7d743781c3f41340",
        "lessThan": "dbd14f736be02cfe73049bd801af89becd1a0749",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a1e64addf3ff9257b45b78bc7d743781c3f41340",
        "lessThan": "1b41cbe05b184f8861712f0806cc0c4f5d8c6dfe",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a1e64addf3ff9257b45b78bc7d743781c3f41340",
        "lessThan": "3f1f755366687d051174739fb99f7d560202f60b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "6b099d285d7ed324494b6d684f377aa103856118",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "5.15.180",
        "lessThan": "5.15.212",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "6.1.132",
        "lessThan": "6.1.178",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "6.6.84",
        "lessThan": "6.6.145",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "6.12.20",
        "lessThan": "6.12.97",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "6.13.8",
        "lessThan": "6.14",
        "status": "affected",
        "versionType": "semver"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/openvswitch/flow_netlink.c"
    ],
    "versions": [
      {
        "version": "6.14",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.14",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.212",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.178",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.145",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.97",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.40",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1.5",
        "lessThanOrEqual": "7.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2-rc4",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

Source	Link
git	www.git.kernel.org/stable/c/f1efff8858403191361a01269c6fe8dd7f55a385
git	www.git.kernel.org/stable/c/1b41cbe05b184f8861712f0806cc0c4f5d8c6dfe
git	www.git.kernel.org/stable/c/3f1f755366687d051174739fb99f7d560202f60b
git	www.git.kernel.org/stable/c/ab855641241387db062a5e41d9ad6b8561542572
git	www.git.kernel.org/stable/c/dbd14f736be02cfe73049bd801af89becd1a0749
git	www.git.kernel.org/stable/c/d573250d228401f707f4dbc09d11227a6215ee5f
git	www.git.kernel.org/stable/c/c66bd2626c2764f23764ff0f8277f44a9cfe8349

27 Jul 2026 08:16Current

5.7Medium risk

Vulners AI Score5.7