Linux Kernel Vulnerability in rtmutex Component Affecting Multiple Versions
CVE-2026-43499
Key Information:
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What is CVE-2026-43499?
A vulnerability exists in the Linux kernel's rtmutex component where the remove_waiter() function incorrectly utilizes current instead of waiter::task during a dequeue operation within various mutex handling paths. This mismanagement leads to multiple issues, including potential use-after-free vulnerabilities due to dangling pointers and improper priority management across tasks. The implications of this vulnerability necessitate careful attention to maintain system integrity and security.
Affected Version(s)
Linux 8161239a8bcce9ad6b537c04a1fa3b5c68bae693
Linux 8161239a8bcce9ad6b537c04a1fa3b5c68bae693 < 8a1fc8d698ac5e5916e3082a0f74450d71f9611f
Linux 8161239a8bcce9ad6b537c04a1fa3b5c68bae693 < 6d52dfcb2a5db86e346cf51f8fcf2071b8085166
Exploit Proof of Concept (PoC)
PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.