CVE-2026-63863
- Source
- https://cve.org/CVERecord?id=CVE-2026-63863
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63863.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-63863
- Downstream
- Published
- 2026-07-19T14:04:49.967Z
- Modified
- 2026-07-22T05:30:09.195638807Z
- Severity
-
- 8.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
- Summary
- drm/gpusvm: Fix unbalanced unlock in drm_gpusvm_scan_mm()
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
drm/gpusvm: Fix unbalanced unlock in drmgpusvmscan_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->notifierlock) at: [ 931.049801] [<ffffffffa090c0d8>] drmgpusvmscanmm+0x188/0x460 [drmgpusvmhelper] [ 931.050802] but there are no more locks to release! [ 931.051463]
The drmgpusvmnotifierunlock() sits under errfree label and the first jump to errfree is just before calling the drmgpusvmnotifierlock() causing unbalanced unlock.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63863.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/stable/c/8efaa47a871662a8c21b819cec60786f7ef17ab4
- https://git.kernel.org/stable/c/d287dee565c3c32e1ed76ec1847af46809c29b90
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63863.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-63863
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git