CVE-2026-64518
CVE CVE-2026-64518EUVD EUVD-2026-48862Published 2026-07-25T09:14:44.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: tcp: Fix out-of-bounds access for twsk in tcp_ao_established_key(). lockdep_sock_is_held() was added in tcp_ao_established_key() by the cited commit. It can be called from tcp_v[46]_timewait_ack() with twsk. Since it does not have sk->sk_lock, the lockdep annotation results in out-of-bound access. $ pahole -C tcp_timewait_sock vmlinux | grep size /* size: 288, cachelines: 5, members: 8 */ $ pahole -C sock vmlinux | grep sk_lock socket_lock_t sk_lock; /* 440 192 */ Let's not use lockdep_sock_is_held() for TCP_TIME_WAIT.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux 051f49d5176613dea88ecf73a101c3a99f4720e9 <87bb3e719042f0030a6dad39118c6a6b2a491ad9; 6b2d11e2d8fc130df4708be0b6b53fd3e6b54cf6 <03cb001ef87b3f8d859cf7f96329acf3d6235d29; 6b2d11e2d8fc130df4708be0b6b53fd3e6b54cf6 <510db031ba6eb40134f84c90ef963ea4b6dfb878; patch: 0; 6.13; 6b2d11e2d8fc130df4708be0b6b53fd3e6b54cf6 <29cf64d128c94cf98d1c69d8b2962d39db5ff4c6; patch: 7.1; patch: 6.12.92; patch: 6.18.34; patch: 7.0.11; 6.12.5 <6.12.92
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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