CVE - CVE-2022-48950

CVE-ID
CVE-2022-48950	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: perf: Fix perf_pending_task() UaF Per syzbot it is possible for perf_pending_task() to run after the event is free()'d. There are two related but distinct cases: - the task_work was already queued before destroying the event; - destroying the event itself queues the task_work. The first cannot be solved using task_work_cancel() since perf_release() itself might be called from a task_work (____fput), which means the current->task_works list is already empty and task_work_cancel() won't be able to find the perf_pending_task() entry. The simplest alternative is extending the perf_event lifetime to cover the task_work. The second is just silly, queueing a task_work while you know the event is going away makes no sense and is easily avoided by re-arranging how the event is marked STATE_DEAD and ensuring it goes through STATE_OFF on the way down.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/517e6a301f34613bff24a8e35b5455884f2d83d8 URL:https://git.kernel.org/stable/c/517e6a301f34613bff24a8e35b5455884f2d83d8 MISC:https://git.kernel.org/stable/c/78e1317a174edbfd1182599bf76c092a2877672c URL:https://git.kernel.org/stable/c/78e1317a174edbfd1182599bf76c092a2877672c MISC:https://git.kernel.org/stable/c/8bffa95ac19ff27c8261904f89d36c7fcf215d59 URL:https://git.kernel.org/stable/c/8bffa95ac19ff27c8261904f89d36c7fcf215d59
Assigning CNA
kernel.org
Date Record Created
20240822	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240822)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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