{"id":"CVE-2026-68364","summary":"drm/amd/display: Fix ISM dc_lock deadlock during suspend","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Fix ISM dc_lock deadlock during suspend\n\n[Why]\nSystem hang observed during suspend/resume while video is playing.\namdgpu_dm_ism_disable() is called under dc_lock and waits for ISM\ndelayed work via disable_delayed_work_sync(). The work handlers\nthemselves take dc_lock, producing an ABBA deadlock when a worker is\nin flight at suspend time.\n\n[How]\nSplit the disable path into two phases with opposite locking\ncontracts:\n  1. amdgpu_dm_ism_disable() -- quiesces workers, must NOT hold\n     dc_lock.\n  2. amdgpu_dm_ism_force_full_power() (new) -- drives the ISM FSM\n     back to FULL_POWER_RUNNING, must hold dc_lock.","modified":"2026-08-20T03:30:45.522815579Z","published":"2026-08-10T12:03:41.385Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68364.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3714fe242592e3699ac5e2c19d68b275a210be7d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/95776812e6b8f908563e8994d5d947b68baf68a6"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68364.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68364"},{"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":"754003486c3cc95f2fcb9d6b71a779047d6db95c"},{"fixed":"95776812e6b8f908563e8994d5d947b68baf68a6"},{"fixed":"3714fe242592e3699ac5e2c19d68b275a210be7d"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68364.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.1.0"},{"fixed":"7.1.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68364.json"}}],"schema_version":"1.9.0"}