{"id":"CVE-2026-63863","summary":"drm/gpusvm: Fix unbalanced unlock in drm_gpusvm_scan_mm()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/gpusvm: Fix unbalanced unlock in drm_gpusvm_scan_mm()\n\nThere is a unbalanced lock/unlock to gpusvm notifier lock:\n[  931.045868] =====================================\n[  931.046509] WARNING: bad unlock balance detected!\n[  931.047149] 6.19.0-rc6+xe-**************** #9 Tainted: G     U\n[  931.048150] -------------------------------------\n[  931.048790] kworker/u5:0/51 is trying to release lock (&gpusvm-\u003enotifier_lock) at:\n[  931.049801] [\u003cffffffffa090c0d8\u003e] drm_gpusvm_scan_mm+0x188/0x460 [drm_gpusvm_helper]\n[  931.050802] but there are no more locks to release!\n[  931.051463]\n\nThe drm_gpusvm_notifier_unlock() sits under err_free label and the\nfirst jump to err_free is just before calling the\ndrm_gpusvm_notifier_lock() causing unbalanced unlock.","modified":"2026-07-22T05:30:09.195638807Z","published":"2026-07-19T14:04:49.967Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63863.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/8efaa47a871662a8c21b819cec60786f7ef17ab4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d287dee565c3c32e1ed76ec1847af46809c29b90"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63863.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63863"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"f1d08a5864822684773105c60528e2abb577ca6c"},{"fixed":"8efaa47a871662a8c21b819cec60786f7ef17ab4"},{"fixed":"d287dee565c3c32e1ed76ec1847af46809c29b90"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63863.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.0.0"},{"fixed":"7.0.10"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63863.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"}]}