CVE-2026-63863

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-63863

Key Details

CVE	CVE-2026-63863
CVSS Score / Version	8.8 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is changed; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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

drm/gpusvm: Fix unbalanced unlock in drm_gpusvm_scan_mm()

There is a unbalanced lock/unlock to gpusvm notifier lock:

[ 931.045868] =====================================

[ 931.046509] WARNING: bad unlock balance detected!

[ 931.047149] 6.19.0-rc6+xe-**************** #9 Tainted: G U

[ 931.048150] -------------------------------------

[ 931.048790] kworker/u5:0/51 is trying to release lock (&gpusvm->notifier_lock) at:

[ 931.049801] [<ffffffffa090c0d8>] drm_gpusvm_scan_mm+0x188/0x460 [drm_gpusvm_helper]

[ 931.050802] but there are no more locks to release!

[ 931.051463]

The drm_gpusvm_notifier_unlock() sits under err_free label and the

first jump to err_free is just before calling the

drm_gpusvm_notifier_lock() causing unbalanced unlock. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-63863
CVE	https://www.cve.org/CVERecord?id=CVE-2026-63863

Source

Reference

NVD

CVE