UAF in eventpoll.c allows local privilege escalation
CVE-2026-56906 Published on October 6, 2026
In ep_free of eventpoll.c, there is a possible use-after-free due to a race condition. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
Vulnerability Analysis
CVE-2026-56906 is exploitable with local system access, and requires small amount of user privileges. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
What is a Race Condition Vulnerability?
The program contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently.
CVE-2026-56906 has been classified to as a Race Condition vulnerability or weakness.
Products Associated with CVE-2026-56906
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