{"id":"CVE-2026-63863","revision":"efa4896af3be494f828d5e5892349489","records":[{"revision":"efa4896af3be494f828d5e5892349489","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-63863","aliases":[],"title":"drm/gpusvm: Fix unbalanced unlock in drm_gpusvm_scan_mm()","description":"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->notifier_lock) at:\n[  931.049801] [<ffffffffa090c0d8>] 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.","state":0,"publishedAt":"2026-07-19T14:04:49.967+00:00","modifiedAt":"2026-10-19T20:17:53.141+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/gpu/drm/drm_gpusvm.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"f1d08a5864822684773105c60528e2abb577ca6c\",\n                            \"lessThan\": \"8efaa47a871662a8c21b819cec60786f7ef17ab4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f1d08a5864822684773105c60528e2abb577ca6c\",\n                            \"lessThan\": \"d287dee565c3c32e1ed76ec1847af46809c29b90\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/gpu/drm/drm_gpusvm.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"7.0\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"7.0\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0.10\",\n                            \"lessThanOrEqual\": \"7.0.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","score":8.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/8efaa47a871662a8c21b819cec60786f7ef17ab4","https://git.kernel.org/stable/c/d287dee565c3c32e1ed76ec1847af46809c29b90"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-63863","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-63863","identifiers":["CVE-2026-63863"]},"retained":false,"historicalAffected":[]}],"coverage":[]}