CVE-2022-48887

drm/vmwgfx: Remove rcu locks from user resources

CVE-2022-48887 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-48887, released August 21, 2024. It is not reported as exploited. Patch Radar priority: Routine.

Routine

CVSS

5.5

Moderate

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0025

16th percentile

In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: Remove rcu locks from user resources User resource lookups used rcu to avoid two extra atomics. Unfortunately the rcu paths were buggy and it was easy to make the driver crash by submitting command buffers from two different threads. Because the lookups never show up in performance profiles replace them with a regular spin lock which fixes the races in accesses to those shared resources. Fixes kernel oops'es in IGT's vmwgfx execution_buffer stress test and seen crashes with apps using shared resources.

Where it's fixed

Product	Fixed in	Fix	Released
Linux
linux · Debian 12.15 (bookworm)	6.1.7-1	DEBIAN-CVE-2022-48887	Aug 21, 2024
linux · Debian 13.5 (trixie)	6.1.7-1	DEBIAN-CVE-2022-48887	Aug 21, 2024
linux · Debian 14	6.1.7-1	DEBIAN-CVE-2022-48887	Aug 21, 2024

Details

Published
August 21, 2024
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-48887

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