CVE-2020-25639

low

Published — · Modified —

CVSS v3

—

CVSS v2

—

VIR risk

2.5

Description

A NULL pointer dereference flaw was found in the Linux kernel's GPU Nouveau driver functionality in versions prior to 5.12-rc1 in the way the user calls ioctl DRM_IOCTL_NOUVEAU_CHANNEL_ALLOC. This flaw allows a local user to crash the system.

Predictions

Exploit likelihood

20%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2020-25639

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2020-25639.html

OS impact

OS	Version	Status	Fixed in
arch		fixed	`5.10.21.hardened1-1`
sles		affected
debian	bookworm	fixed	`5.10.19-1`
debian	bullseye	fixed	`5.10.19-1`
debian	forky	fixed	`5.10.19-1`
debian	sid	fixed	`5.10.19-1`
debian	trixie	fixed	`5.10.19-1`

References

https://www.suse.com/security/cve/CVE-2020-25639.html
https://security-tracker.debian.org/tracker/CVE-2020-25639

Verify integrity in audit chain (admin only). AS-IS.