{"id":"CVE-2024-56764","summary":"ublk: detach gendisk from ublk device if add_disk() fails","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nublk: detach gendisk from ublk device if add_disk() fails\n\nInside ublk_abort_requests(), gendisk is grabbed for aborting all\ninflight requests. And ublk_abort_requests() is called when exiting\nthe uring context or handling timeout.\n\nIf add_disk() fails, the gendisk may have been freed when calling\nublk_abort_requests(), so use-after-free can be caused when getting\ndisk's reference in ublk_abort_requests().\n\nFixes the bug by detaching gendisk from ublk device if add_disk() fails.","modified":"2026-04-02T12:25:13.542257Z","published":"2025-01-06T16:20:43.256Z","related":["USN-7379-2","USN-7380-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/56xxx/CVE-2024-56764.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/75cd4005da5492129917a4a4ee45e81660556104"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7d680f2f76a3417fdfc3946da7471e81464f7b41"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/56xxx/CVE-2024-56764.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-56764"},{"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":"bd23f6c2c2d00518e2f27f2d25cef795de9bee56"},{"fixed":"7d680f2f76a3417fdfc3946da7471e81464f7b41"},{"fixed":"75cd4005da5492129917a4a4ee45e81660556104"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-56764.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}