CVE-2026-64518
Description
A flaw was found in the Linux kernel's TCP implementation. An out-of-bounds access vulnerability exists when the lockdep_sock_is_held() function is called with a tcp_timewait_sock object. This occurs because the tcp_timewait_sock object lacks the necessary sk->sk_lock, leading to an incorrect lockdep annotation. This issue could potentially lead to system instability or other undefined behavior.
Understanding the Weakness (CWE)
Integrity
Technical Impact: Modify Memory; Execute Unauthorized Code or Commands
Write operations could cause memory corruption. In some cases, an adversary can modify control data such as return addresses in order to execute unexpected code.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
Attempting to access out-of-range, invalid, or unauthorized memory could cause the product to crash.
Other
Technical Impact: Unexpected State
Subsequent write operations can produce undefined or unexpected results.
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