EUVD-2026-48862
GHSA-mfg2-ph7g-pf6h
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2DescriptionCVE.org
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.
Analysis
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.
Same technique Buffer Overflow
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External POC / Exploit Code
Leaving vuln.today