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CVE-2026-64531

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 con
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:5d1d4f94473193d270366f2aaa2bc49c542379ff1fedac84c208be88635b3949
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"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":"4b1a0ee6164c720…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:661d6f2138a0a2d159598c9972c2ecbe1bc4f9d3cdc3b6ca0a2f133b1c7cca58 · sha256:11f85085c0a05c43… · /containers/cna/affected/0

{"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"},{"…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:661d6f2138a0a2d159598c9972c2ecbe1bc4f9d3cdc3b6ca0a2f133b1c7cca58 · sha256:11f85085c0a05c43… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"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":"4b1a0ee6164c720…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:661d6f2138a0a2d159598c9972c2ecbe1bc4f9d3cdc3b6ca0a2f133b1c7cca58 · sha256:11f85085c0a05c43… · /containers/cna/affected/0
{"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"},{"…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:661d6f2138a0a2d159598c9972c2ecbe1bc4f9d3cdc3b6ca0a2f133b1c7cca58 · sha256:11f85085c0a05c43… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"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"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:661d6f2138a0a2d159598c9972c2ecbe1bc4f9d3cdc3b6ca0a2f133b1c7cca58 · sha256:11f85085c0a05c43… · /containers/cna/metrics/0/cvssV3_1

Source references

11 source assertions
{"url":"http://www.openwall.com/lists/oss-security/2026/07/28/8"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:661d6f2138a0a2d159598c9972c2ecbe1bc4f9d3cdc3b6ca0a2f133b1c7cca58 · sha256:11f85085c0a05c43… · /containers/adp/0/references/0
{"url":"http://www.openwall.com/lists/oss-security/2026/07/31/17"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:661d6f2138a0a2d159598c9972c2ecbe1bc4f9d3cdc3b6ca0a2f133b1c7cca58 · sha256:11f85085c0a05c43… · /containers/adp/0/references/1
{"url":"http://www.openwall.com/lists/oss-security/2026/08/01/1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:661d6f2138a0a2d159598c9972c2ecbe1bc4f9d3cdc3b6ca0a2f133b1c7cca58 · sha256:11f85085c0a05c43… · /containers/adp/0/references/2
{"url":"http://www.openwall.com/lists/oss-security/2026/08/01/3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:661d6f2138a0a2d159598c9972c2ecbe1bc4f9d3cdc3b6ca0a2f133b1c7cca58 · sha256:11f85085c0a05c43… · /containers/adp/0/references/3
{"url":"https://git.kernel.org/stable/c/1b41cbe05b184f8861712f0806cc0c4f5d8c6dfe"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:661d6f2138a0a2d159598c9972c2ecbe1bc4f9d3cdc3b6ca0a2f133b1c7cca58 · sha256:11f85085c0a05c43… · /containers/cna/references/5
{"url":"https://git.kernel.org/stable/c/3f1f755366687d051174739fb99f7d560202f60b"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:661d6f2138a0a2d159598c9972c2ecbe1bc4f9d3cdc3b6ca0a2f133b1c7cca58 · sha256:11f85085c0a05c43… · /containers/cna/references/6
{"url":"https://git.kernel.org/stable/c/ab855641241387db062a5e41d9ad6b8561542572"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:661d6f2138a0a2d159598c9972c2ecbe1bc4f9d3cdc3b6ca0a2f133b1c7cca58 · sha256:11f85085c0a05c43… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/c66bd2626c2764f23764ff0f8277f44a9cfe8349"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:661d6f2138a0a2d159598c9972c2ecbe1bc4f9d3cdc3b6ca0a2f133b1c7cca58 · sha256:11f85085c0a05c43… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/d573250d228401f707f4dbc09d11227a6215ee5f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:661d6f2138a0a2d159598c9972c2ecbe1bc4f9d3cdc3b6ca0a2f133b1c7cca58 · sha256:11f85085c0a05c43… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/dbd14f736be02cfe73049bd801af89becd1a0749"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:661d6f2138a0a2d159598c9972c2ecbe1bc4f9d3cdc3b6ca0a2f133b1c7cca58 · sha256:11f85085c0a05c43… · /containers/cna/references/4
{"url":"https://git.kernel.org/stable/c/f1efff8858403191361a01269c6fe8dd7f55a385"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:661d6f2138a0a2d159598c9972c2ecbe1bc4f9d3cdc3b6ca0a2f133b1c7cca58 · sha256:11f85085c0a05c43… · /containers/cna/references/3

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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