CVE-2026-63863

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.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.0 / Impact : 6.0

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://git.kernel.org/stable/c/8efaa47a871662a8c21b819cec60786f7ef17ab4	Patch
https://git.kernel.org/stable/c/d287dee565c3c32e1ed76ec1847af46809c29b90	Patch

Configurations

Configuration 1 (hide)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

History

26 Oct 2026, 17:00

Type	Values Removed	Values Added
CPE		cpe:2.3:o:linux:linux_kernel::::::::
References	~~() https://git.kernel.org/stable/c/8efaa47a871662a8c21b819cec60786f7ef17ab4 -~~	() https://git.kernel.org/stable/c/8efaa47a871662a8c21b819cec60786f7ef17ab4 - Patch
References	~~() https://git.kernel.org/stable/c/d287dee565c3c32e1ed76ec1847af46809c29b90 -~~	() https://git.kernel.org/stable/c/d287dee565c3c32e1ed76ec1847af46809c29b90 - Patch
First Time		Linux linux Kernel Linux

19 Oct 2026, 21:17

Type	Values Removed	Values Added
CWE		CWE-667

Information

Published : 2026-07-19 15:16

Updated : 2026-10-26 17:00

NVD link : CVE-2026-63863

Mitre link : CVE-2026-63863

CVE.ORG link : CVE-2026-63863

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-667

Improper Locking

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