CVE-2026-64518

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux051f49d5176613dea88ecf73a101c3a99f4720e9 < 87bb3e719042f0030a6dad39118c6a6b2a491ad9affected
LinuxLinux6b2d11e2d8fc130df4708be0b6b53fd3e6b54cf6 < 510db031ba6eb40134f84c90ef963ea4b6dfb878affected
LinuxLinux6b2d11e2d8fc130df4708be0b6b53fd3e6b54cf6 < 29cf64d128c94cf98d1c69d8b2962d39db5ff4c6affected
LinuxLinux6b2d11e2d8fc130df4708be0b6b53fd3e6b54cf6 < 03cb001ef87b3f8d859cf7f96329acf3d6235d29affected
LinuxLinux6.12.5 < 6.12.92affected
LinuxLinux6.13affected
LinuxLinux0 < 6.13unaffected
LinuxLinux6.12.92 <= 6.12.*unaffected
LinuxLinux6.18.34 <= 6.18.*unaffected
LinuxLinux7.0.11 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References