{"cve":"CVE-2026-64518","nvd":{"published":"2026-07-25T10:17:38.080","modified":"2026-07-25T10:17:38.080","status":"Received","description":"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.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/03cb001ef87b3f8d859cf7f96329acf3d6235d29","https://git.kernel.org/stable/c/29cf64d128c94cf98d1c69d8b2962d39db5ff4c6","https://git.kernel.org/stable/c/510db031ba6eb40134f84c90ef963ea4b6dfb878","https://git.kernel.org/stable/c/87bb3e719042f0030a6dad39118c6a6b2a491ad9"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:46:40.600842820+00:00"},"epss":{"cve":"CVE-2026-64518","score":0.00168,"percentile":0.0607,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}