CVE-2023-0468

Published: Jan 26, 2023Modified: Jun 17, 2026

4.7

Vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploitability: 1.0 / Impact: 3.6

Source: NVD

Description

A use-after-free flaw was found in io_uring/poll.c in io_poll_check_events in the io_uring subcomponent in the Linux Kernel due to a race condition of poll_refs. This flaw may cause a NULL pointer dereference.

Affected (8)

Products: Linux: Linux Kernel

Linux

1 product

Linux Kernel

Configuration A

8 vulnerable

Vulnerable Software	Affected Versions
Linux Linux Kernel	Before 6.1
Linux Linux Kernel	Version 6.1
Linux Linux Kernel	Version 6.1 rc1
Linux Linux Kernel	Version 6.1 rc2
Linux Linux Kernel	Version 6.1 rc3
Linux Linux Kernel	Version 6.1 rc4
Linux Linux Kernel	Version 6.1 rc5
Linux Linux Kernel	Version 6.1 rc6

Related CWEs

CWE-416

Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

References (2)

https://bugzilla.redhat.com/show_bug.cgi?id=2164024

Source: secalert@redhat.com

ExploitIssue TrackingPatchThird Party Advisory

https://bugzilla.redhat.com/show_bug.cgi?id=2164024

Source: af854a3a-2127-422b-91ae-364da2661108

ExploitIssue TrackingPatchThird Party Advisory

Timeline

No history available yet.