{"id":"CVE-2026-23063","summary":"uacce: ensure safe queue release with state management","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nuacce: ensure safe queue release with state management\n\nDirectly calling `put_queue` carries risks since it cannot\nguarantee that resources of `uacce_queue` have been fully released\nbeforehand. So adding a `stop_queue` operation for the\nUACCE_CMD_PUT_Q command and leaving the `put_queue` operation to\nthe final resource release ensures safety.\n\nQueue states are defined as follows:\n- UACCE_Q_ZOMBIE: Initial state\n- UACCE_Q_INIT: After opening `uacce`\n- UACCE_Q_STARTED: After `start` is issued via `ioctl`\n\nWhen executing `poweroff -f` in virt while accelerator are still\nworking, `uacce_fops_release` and `uacce_remove` may execute\nconcurrently. This can cause `uacce_put_queue` within\n`uacce_fops_release` to access a NULL `ops` pointer. Therefore, add\nstate checks to prevent accessing freed pointers.","modified":"2026-04-02T17:29:40.596640Z","published":"2026-02-04T16:07:45.426Z","related":["SUSE-SU-2026:0962-1","SUSE-SU-2026:1081-1","SUSE-SU-2026:20667-1","SUSE-SU-2026:20720-1","SUSE-SU-2026:20838-1","SUSE-SU-2026:20845-1","SUSE-SU-2026:20876-1","SUSE-SU-2026:20931-1","openSUSE-SU-2026:20416-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23063.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/26c08dabe5475d99a13f353d8dd70e518de45663"},{"type":"WEB","url":"https://git.kernel.org/stable/c/336fb41a186e7c0415ae94fec9e23d1f04b87483"},{"type":"WEB","url":"https://git.kernel.org/stable/c/43f233eb6e7b9d88536881a9bc43726d0e34800d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/47634d70073890c9c37e39ab4ff93d4b585b028a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8b57bf1d3b1db692f34bce694a03e41be79f6016"},{"type":"WEB","url":"https://git.kernel.org/stable/c/92e4f11e29b98ef424ff72d6371acac03e5d973c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b457abeb5d962db88aaf60e249402fd3073dbfab"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23063.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23063"},{"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":"015d239ac0142ad0e26567fd890ef8d171f13709"},{"fixed":"b457abeb5d962db88aaf60e249402fd3073dbfab"},{"fixed":"8b57bf1d3b1db692f34bce694a03e41be79f6016"},{"fixed":"336fb41a186e7c0415ae94fec9e23d1f04b87483"},{"fixed":"43f233eb6e7b9d88536881a9bc43726d0e34800d"},{"fixed":"47634d70073890c9c37e39ab4ff93d4b585b028a"},{"fixed":"92e4f11e29b98ef424ff72d6371acac03e5d973c"},{"fixed":"26c08dabe5475d99a13f353d8dd70e518de45663"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23063.json"}}],"schema_version":"1.7.5"}