GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2026-64531 (GCVE-0-2026-64531)

Vulnerability from cvelistv5 – Published: 2026-07-27 06:32 – Updated: 2026-08-22 04:12
VLAI
Title
net: openvswitch: reject oversized nested action attrs
Summary
In the Linux kernel, the following vulnerability has been resolved: net: openvswitch: reject oversized nested action attrs Open vSwitch stores generated flow actions as nlattrs, whose nla_len field is u16. Commit a1e64addf3ff ("net: openvswitch: remove misbehaving actions length check") allowed the total sw_flow_actions stream to grow beyond 64 KiB, which is valid, but also removed the last guard preventing a generated nested action attribute from exceeding U16_MAX. An oversized generated container can thus be closed with a truncated nla_len. A later dump or teardown then walks a structurally different stream than the one that was validated. In particular, an oversized nested CLONE/CT action may cause subsequent bytes in the generated stream to be interpreted as independent actions. Keep the larger total-action-stream behavior, but make nested action close reject generated containers that do not fit in nla_len, and return the error through all callers. For recursive SAMPLE, CLONE, DEC_TTL, and CHECK_PKT_LEN builders, trim resource-owning action-list tails in reverse construction order before discarding failed wrappers, so resources copied into the rejected tails are released before the wrappers are removed. Most failed outer wrappers are discarded by truncating actions_len after child resources have been released. CHECK_PKT_LEN also trims its parent after branch resources are gone. SET/TUNNEL close failures unwind their known tun_dst ownership directly, and SET_TO_MASKED has no external ownership and truncates on close failure.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 057dbc5b72e9fcac439cd561c3a539b8a0edeb92 , < ab855641241387db062a5e41d9ad6b8561542572 (git)
Affected: 2532adbfe917c0e71dba2650ffc6efe396314c87 , < c66bd2626c2764f23764ff0f8277f44a9cfe8349 (git)
Affected: 4b1a0ee6164c7204c68ab5a9c48c07bfe8852485 , < d573250d228401f707f4dbc09d11227a6215ee5f (git)
Affected: e6610f9c08b4c04cf7949c10fc246c071d00e935 , < f1efff8858403191361a01269c6fe8dd7f55a385 (git)
Affected: a1e64addf3ff9257b45b78bc7d743781c3f41340 , < dbd14f736be02cfe73049bd801af89becd1a0749 (git)
Affected: a1e64addf3ff9257b45b78bc7d743781c3f41340 , < 1b41cbe05b184f8861712f0806cc0c4f5d8c6dfe (git)
Affected: a1e64addf3ff9257b45b78bc7d743781c3f41340 , < 3f1f755366687d051174739fb99f7d560202f60b (git)
Affected: 6b099d285d7ed324494b6d684f377aa103856118 (git)
Affected: 5.15.180 , < 5.15.212 (semver)
Affected: 6.1.132 , < 6.1.178 (semver)
Affected: 6.6.84 , < 6.6.145 (semver)
Affected: 6.12.20 , < 6.12.97 (semver)
Affected: 6.13.8 , < 6.14 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 6.14
Unaffected: 0 , < 6.14 (semver)
Unaffected: 5.15.212 , ≤ 5.15.* (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.97 , ≤ 6.12.* (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-08-22T04:12:18.141Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/07/28/8"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/07/31/17"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/08/01/1"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/08/01/3"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/08/22/1"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/openvswitch/flow_netlink.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ab855641241387db062a5e41d9ad6b8561542572",
              "status": "affected",
              "version": "057dbc5b72e9fcac439cd561c3a539b8a0edeb92",
              "versionType": "git"
            },
            {
              "lessThan": "c66bd2626c2764f23764ff0f8277f44a9cfe8349",
              "status": "affected",
              "version": "2532adbfe917c0e71dba2650ffc6efe396314c87",
              "versionType": "git"
            },
            {
              "lessThan": "d573250d228401f707f4dbc09d11227a6215ee5f",
              "status": "affected",
              "version": "4b1a0ee6164c7204c68ab5a9c48c07bfe8852485",
              "versionType": "git"
            },
            {
              "lessThan": "f1efff8858403191361a01269c6fe8dd7f55a385",
              "status": "affected",
              "version": "e6610f9c08b4c04cf7949c10fc246c071d00e935",
              "versionType": "git"
            },
            {
              "lessThan": "dbd14f736be02cfe73049bd801af89becd1a0749",
              "status": "affected",
              "version": "a1e64addf3ff9257b45b78bc7d743781c3f41340",
              "versionType": "git"
            },
            {
              "lessThan": "1b41cbe05b184f8861712f0806cc0c4f5d8c6dfe",
              "status": "affected",
              "version": "a1e64addf3ff9257b45b78bc7d743781c3f41340",
              "versionType": "git"
            },
            {
              "lessThan": "3f1f755366687d051174739fb99f7d560202f60b",
              "status": "affected",
              "version": "a1e64addf3ff9257b45b78bc7d743781c3f41340",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6b099d285d7ed324494b6d684f377aa103856118",
              "versionType": "git"
            },
            {
              "lessThan": "5.15.212",
              "status": "affected",
              "version": "5.15.180",
              "versionType": "semver"
            },
            {
              "lessThan": "6.1.178",
              "status": "affected",
              "version": "6.1.132",
              "versionType": "semver"
            },
            {
              "lessThan": "6.6.145",
              "status": "affected",
              "version": "6.6.84",
              "versionType": "semver"
            },
            {
              "lessThan": "6.12.97",
              "status": "affected",
              "version": "6.12.20",
              "versionType": "semver"
            },
            {
              "lessThan": "6.14",
              "status": "affected",
              "version": "6.13.8",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/openvswitch/flow_netlink.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.14"
            },
            {
              "lessThan": "6.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.212",
                  "versionStartIncluding": "5.15.180",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.178",
                  "versionStartIncluding": "6.1.132",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.145",
                  "versionStartIncluding": "6.6.84",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.97",
                  "versionStartIncluding": "6.12.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.40",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.13.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: openvswitch: reject oversized nested action attrs\n\nOpen vSwitch stores generated flow actions as nlattrs, whose nla_len\nfield is u16. Commit a1e64addf3ff (\"net: openvswitch: remove\nmisbehaving actions length check\") allowed the total sw_flow_actions\nstream to grow beyond 64 KiB, which is valid, but also removed the last\nguard preventing a generated nested action attribute from exceeding\nU16_MAX.\n\nAn oversized generated container can thus be closed with a truncated\nnla_len. A later dump or teardown then walks a structurally different\nstream than the one that was validated. In particular, an oversized\nnested CLONE/CT action may cause subsequent bytes in the generated\nstream to be interpreted as independent actions.\n\nKeep the larger total-action-stream behavior, but make nested action\nclose reject generated containers that do not fit in nla_len, and return\nthe error through all callers. For recursive SAMPLE, CLONE, DEC_TTL, and\nCHECK_PKT_LEN builders, trim resource-owning action-list tails in reverse\nconstruction order before discarding failed wrappers, so resources copied\ninto the rejected tails are released before the wrappers are removed.\n\nMost failed outer wrappers are discarded by truncating actions_len after\nchild resources have been released. CHECK_PKT_LEN also trims its parent\nafter branch resources are gone. SET/TUNNEL close failures unwind their\nknown tun_dst ownership directly, and SET_TO_MASKED has no external\nownership and truncates on close failure."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable action builder is reached through local Generic Netlink requests such as OVS_FLOW_CMD_NEW or OVS_PACKET_CMD_EXECUTE. Remote packets cannot construct the malformed action stream.\nAC:L - The attacker deterministically controls the nested-action expansion, wrapped length, and resulting parser alignment; no race or uncontrollable condition is required.\nPR:L - The operations require CAP_NET_ADMIN but use GENL_UNS_ADMIN_PERM in namespace-aware families. An unprivileged user can obtain the required capability through an allowed user and network namespace.\nUI:N - Once the attacker sends the crafted netlink request, vulnerable dumping, teardown, or execution occurs without another user\u0027s participation.\nS:U - The vulnerability and its effects remain within the host kernel\u0027s security authority. Kernel privilege escalation from a user namespace does not constitute a CVSS scope change.\nC:H - Length truncation can reinterpret attacker-controlled userdata as an internal SET or CT action. The dump path can consequently dereference an attacker-selected kernel pointer and serialize referenced memory.\nI:H - Fake SET or CT actions can make execution or teardown perform reference-count operations, releases, and frees through attacker-controlled pointers. This provides exploitable memory-corruption primitives capable of kernel code execution.\nA:H - Attacker-controlled invalid pointers can cause a kernel oops or panic, while zero-length misparsed actions can cause a non-advancing execution loop and soft lockup."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T04:57:08.992Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/ab855641241387db062a5e41d9ad6b8561542572"
        },
        {
          "url": "https://git.kernel.org/stable/c/c66bd2626c2764f23764ff0f8277f44a9cfe8349"
        },
        {
          "url": "https://git.kernel.org/stable/c/d573250d228401f707f4dbc09d11227a6215ee5f"
        },
        {
          "url": "https://git.kernel.org/stable/c/f1efff8858403191361a01269c6fe8dd7f55a385"
        },
        {
          "url": "https://git.kernel.org/stable/c/dbd14f736be02cfe73049bd801af89becd1a0749"
        },
        {
          "url": "https://git.kernel.org/stable/c/1b41cbe05b184f8861712f0806cc0c4f5d8c6dfe"
        },
        {
          "url": "https://git.kernel.org/stable/c/3f1f755366687d051174739fb99f7d560202f60b"
        }
      ],
      "title": "net: openvswitch: reject oversized nested action attrs",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64531",
    "datePublished": "2026-07-27T06:32:32.596Z",
    "dateReserved": "2026-07-19T15:36:31.794Z",
    "dateUpdated": "2026-08-22T04:12:18.141Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-64531",
      "date": "2026-09-05",
      "epss": "0.0038",
      "percentile": "0.31047"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-64531\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-07-27T08:16:22.243\",\"lastModified\":\"2026-08-22T04:17:58.720\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: openvswitch: reject oversized nested action attrs\\n\\nOpen vSwitch stores generated flow actions as nlattrs, whose nla_len\\nfield is u16. Commit a1e64addf3ff (\\\"net: openvswitch: remove\\nmisbehaving actions length check\\\") allowed the total sw_flow_actions\\nstream to grow beyond 64 KiB, which is valid, but also removed the last\\nguard preventing a generated nested action attribute from exceeding\\nU16_MAX.\\n\\nAn oversized generated container can thus be closed with a truncated\\nnla_len. A later dump or teardown then walks a structurally different\\nstream than the one that was validated. In particular, an oversized\\nnested CLONE/CT action may cause subsequent bytes in the generated\\nstream to be interpreted as independent actions.\\n\\nKeep the larger total-action-stream behavior, but make nested action\\nclose reject generated containers that do not fit in nla_len, and return\\nthe error through all callers. For recursive SAMPLE, CLONE, DEC_TTL, and\\nCHECK_PKT_LEN builders, trim resource-owning action-list tails in reverse\\nconstruction order before discarding failed wrappers, so resources copied\\ninto the rejected tails are released before the wrappers are removed.\\n\\nMost failed outer wrappers are discarded by truncating actions_len after\\nchild resources have been released. CHECK_PKT_LEN also trims its parent\\nafter branch resources are gone. SET/TUNNEL close failures unwind their\\nknown tun_dst ownership directly, and SET_TO_MASKED has no external\\nownership and truncates on close failure.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/openvswitch/flow_netlink.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"057dbc5b72e9fcac439cd561c3a539b8a0edeb92\",\"lessThan\":\"ab855641241387db062a5e41d9ad6b8561542572\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2532adbfe917c0e71dba2650ffc6efe396314c87\",\"lessThan\":\"c66bd2626c2764f23764ff0f8277f44a9cfe8349\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4b1a0ee6164c7204c68ab5a9c48c07bfe8852485\",\"lessThan\":\"d573250d228401f707f4dbc09d11227a6215ee5f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e6610f9c08b4c04cf7949c10fc246c071d00e935\",\"lessThan\":\"f1efff8858403191361a01269c6fe8dd7f55a385\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a1e64addf3ff9257b45b78bc7d743781c3f41340\",\"lessThan\":\"dbd14f736be02cfe73049bd801af89becd1a0749\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a1e64addf3ff9257b45b78bc7d743781c3f41340\",\"lessThan\":\"1b41cbe05b184f8861712f0806cc0c4f5d8c6dfe\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a1e64addf3ff9257b45b78bc7d743781c3f41340\",\"lessThan\":\"3f1f755366687d051174739fb99f7d560202f60b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6b099d285d7ed324494b6d684f377aa103856118\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5.15.180\",\"lessThan\":\"5.15.212\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.1.132\",\"lessThan\":\"6.1.178\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.6.84\",\"lessThan\":\"6.6.145\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.12.20\",\"lessThan\":\"6.12.97\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.13.8\",\"lessThan\":\"6.14\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/openvswitch/flow_netlink.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.14\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.14\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.212\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.178\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.97\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.40\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.5\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"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}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1b41cbe05b184f8861712f0806cc0c4f5d8c6dfe\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3f1f755366687d051174739fb99f7d560202f60b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ab855641241387db062a5e41d9ad6b8561542572\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c66bd2626c2764f23764ff0f8277f44a9cfe8349\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d573250d228401f707f4dbc09d11227a6215ee5f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dbd14f736be02cfe73049bd801af89becd1a0749\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f1efff8858403191361a01269c6fe8dd7f55a385\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"http://www.openwall.com/lists/oss-security/2026/07/28/8\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://www.openwall.com/lists/oss-security/2026/07/31/17\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://www.openwall.com/lists/oss-security/2026/08/01/1\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://www.openwall.com/lists/oss-security/2026/08/01/3\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://www.openwall.com/lists/oss-security/2026/08/22/1\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-09-01T12:34:16+00:00",
      "cve": "CVE-2026-64531",
      "id": "CVE-2026-64531",
      "initial_release_date": "2026-07-27T00:00:00+00:00",
      "product_status:fixed": "1145",
      "product_status:known_affected": "23",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net: openvswitch: reject oversized nested action attrs",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64531.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-08-17T16:32:48Z",
      "cve": "CVE-2026-64531",
      "id": "CVE-2026-64531",
      "initial_release_date": "2026-08-09T23:31:19Z",
      "product_status:known_not_affected": "286",
      "product_status:recommended": "87",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64531",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64531.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.