CVE-2022-48771

drm/vmwgfx: Fix stale file descriptors on failed usercopy

State: Published
Severity: 7.8 High
Published: Jun 20, 2024
Updated: Aug 5, 2026
Reserved: Jun 20, 2024

Description

In the Linux kernel, the following vulnerability has been resolved:

drm/vmwgfx: Fix stale file descriptors on failed usercopy

A failing usercopy of the fence_rep object will lead to a stale entry in the file descriptor table as put_unused_fd() won't release it. This enables userland to refer to a dangling 'file' object through that still valid file descriptor, leading to all kinds of use-after-free exploitation scenarios.

Fix this by deferring the call to fd_install() until after the usercopy has succeeded.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	c906965dee22d5e95d0651759ba107b420212a9f to before e8d092a62449dcfc73517ca43963d2b8f44d0516Affected c906965dee22d5e95d0651759ba107b420212a9f to before 0008a0c78fc33a84e2212a7c04e6b21a36ca6f4dAffected c906965dee22d5e95d0651759ba107b420212a9f to before 84b1259fe36ae0915f3d6ddcea6377779de48b82Affected c906965dee22d5e95d0651759ba107b420212a9f to before ae2b20f27732fe92055d9e7b350abc5cdf3e2414Affected c906965dee22d5e95d0651759ba107b420212a9f to before 6066977961fc6f437bc064f628cf9b0e4571c56cAffected c906965dee22d5e95d0651759ba107b420212a9f to before 1d833b27fb708d6fdf5de9f6b3a8be4bd4321565Affected c906965dee22d5e95d0651759ba107b420212a9f to before a0f90c8815706981c483a652a6aefca51a5e191cAffected
LinuxLinux	4.14Affected before 4.14Not affected 4.14.264 through 4.14.Not affected 4.19.227 through 4.19.Not affected 5.4.175 through 5.4.Not affected 5.10.95 through 5.10.Not affected 5.15.18 through 5.15.Not affected 5.16.4 through 5.16.Not affected 5.17 and laterNot affected

Product

Versions

LinuxLinux

c906965dee22d5e95d0651759ba107b420212a9f to before e8d092a62449dcfc73517ca43963d2b8f44d0516Affected
c906965dee22d5e95d0651759ba107b420212a9f to before 0008a0c78fc33a84e2212a7c04e6b21a36ca6f4dAffected
c906965dee22d5e95d0651759ba107b420212a9f to before 84b1259fe36ae0915f3d6ddcea6377779de48b82Affected
c906965dee22d5e95d0651759ba107b420212a9f to before ae2b20f27732fe92055d9e7b350abc5cdf3e2414Affected
c906965dee22d5e95d0651759ba107b420212a9f to before 6066977961fc6f437bc064f628cf9b0e4571c56cAffected
c906965dee22d5e95d0651759ba107b420212a9f to before 1d833b27fb708d6fdf5de9f6b3a8be4bd4321565Affected
c906965dee22d5e95d0651759ba107b420212a9f to before a0f90c8815706981c483a652a6aefca51a5e191cAffected

LinuxLinux

4.14Affected
before 4.14Not affected
4.14.264 through 4.14.*Not affected
4.19.227 through 4.19.*Not affected
5.4.175 through 5.4.*Not affected
5.10.95 through 5.10.*Not affected
5.15.18 through 5.15.*Not affected
5.16.4 through 5.16.*Not affected
5.17 and laterNot affected

References

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