CVE-2026-63863: Linux, състезание за ресурс

Описание

Оригинално описание

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.

Засегнати продукти

• Linux Linux: f1d08a5864822684773105c60528e2abb577ca6c преди 8efaa47a871662a8c21b819cec60786f7ef17ab4; f1d08a5864822684773105c60528e2abb577ca6c преди d287dee565c3c32e1ed76ec1847af46809c29b90
• Linux Linux: 7.0; преди 7.0; 7.0.10 до 7.0.*; 7.1 до *

Вид слабост

• CWE-667 Improper Locking

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99268
• CVE-2026-99266
• CVE-2026-99267

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-63863
• https://nvd.nist.gov/vuln/detail/CVE-2026-63863
• https://git.kernel.org/stable/c/8efaa47a871662a8c21b819cec60786f7ef17ab4
• https://git.kernel.org/stable/c/d287dee565c3c32e1ed76ec1847af46809c29b90