{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64518","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-07-19T15:36:31.794Z","datePublished":"2026-07-25T09:14:44.603Z","dateUpdated":"2026-07-25T09:14:44.603Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-07-25T09:14:44.603Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: Fix out-of-bounds access for twsk in tcp_ao_established_key().\n\nlockdep_sock_is_held() was added in tcp_ao_established_key()\nby the cited commit.\n\nIt can be called from tcp_v[46]_timewait_ack() with twsk.\n\nSince it does not have sk->sk_lock, the lockdep annotation\nresults in out-of-bound access.\n\n  $ pahole -C tcp_timewait_sock vmlinux | grep size\n  \t/* size: 288, cachelines: 5, members: 8 */\n  $ pahole -C sock vmlinux | grep sk_lock\n  \tsocket_lock_t              sk_lock;              /*   440   192 */\n\nLet's not use lockdep_sock_is_held() for TCP_TIME_WAIT."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv4/tcp_ao.c"],"versions":[{"version":"051f49d5176613dea88ecf73a101c3a99f4720e9","lessThan":"87bb3e719042f0030a6dad39118c6a6b2a491ad9","status":"affected","versionType":"git"},{"version":"6b2d11e2d8fc130df4708be0b6b53fd3e6b54cf6","lessThan":"510db031ba6eb40134f84c90ef963ea4b6dfb878","status":"affected","versionType":"git"},{"version":"6b2d11e2d8fc130df4708be0b6b53fd3e6b54cf6","lessThan":"29cf64d128c94cf98d1c69d8b2962d39db5ff4c6","status":"affected","versionType":"git"},{"version":"6b2d11e2d8fc130df4708be0b6b53fd3e6b54cf6","lessThan":"03cb001ef87b3f8d859cf7f96329acf3d6235d29","status":"affected","versionType":"git"},{"version":"6.12.5","lessThan":"6.12.92","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/ipv4/tcp_ao.c"],"versions":[{"version":"6.13","status":"affected"},{"version":"0","lessThan":"6.13","status":"unaffected","versionType":"semver"},{"version":"6.12.92","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.34","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.0.11","lessThanOrEqual":"7.0.*","status":"unaffected","versionType":"semver"},{"version":"7.1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12.5","versionEndExcluding":"6.12.92"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.18.34"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"7.0.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"7.1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/87bb3e719042f0030a6dad39118c6a6b2a491ad9"},{"url":"https://git.kernel.org/stable/c/510db031ba6eb40134f84c90ef963ea4b6dfb878"},{"url":"https://git.kernel.org/stable/c/29cf64d128c94cf98d1c69d8b2962d39db5ff4c6"},{"url":"https://git.kernel.org/stable/c/03cb001ef87b3f8d859cf7f96329acf3d6235d29"}],"title":"tcp: Fix out-of-bounds access for twsk in tcp_ao_established_key().","x_generator":{"engine":"bippy-1.2.0"}}}}