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CVE-2022-23090

Status Candidate

Overview

The aio_aqueue function, used by the lio_listio system call, fails to release a reference to a credential in an error case. An attacker may cause the reference count to overflow, leading to a use after free (UAF).

Related Files

FreeBSD 13.0 aio_aqueue Kernel Refcount Local Privilege Escalation
Posted Aug 18, 2022
Authored by Chris J-D | Site accessvector.net

FreeBSD versions 11.0 through 13.0 suffers from a local privilege escalation vulnerability via an aio_aqueue kernel refcount bug. This research post goes into great depth on how the researcher traversed the logic flow and achieved exploitability.

tags | exploit, paper, kernel, local
systems | freebsd, bsd
advisories | CVE-2022-23090
SHA-256 | 326b5e8f7907c92be98ab7e3ac35bb7766ebdf09bf20a0f1659fef3debf9aa56
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