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.
Affected versions
Linux kernel versions
7.0
and later are affected. Fixed in
7.0.10,
7.1
and their respective stable series.
References
2 totalFrequently asked questions
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What is CVE-2026-63863?
CVE-2026-63863 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 7.0 onward and has been patched in 7.0.10 and 7.1. CVE-2026-63863 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-63863?
Yes — CVE-2026-63863 has been patched. Fixed versions include 7.0.10 and 7.1. If you are running Linux kernel 7.0 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-63863 actively exploited?
No — CVE-2026-63863 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.