{"id":"CVE-2023-0266","aliases":["A-265303544","PUB-A-265303544"],"url":"https://o3.security/vulnerability/CVE-2023-0266","summary":"Use after free in SNDRV_CTL_IOCTL_ELEM in Linux Kernel","details":"A use after free vulnerability exists in the ALSA PCM package in the Linux Kernel. SNDRV_CTL_IOCTL_ELEM_{READ|WRITE}32 is missing locks that can be used in a use-after-free that can result in a priviledge escalation to gain ring0 access from the system user. We recommend upgrading past commit 56b88b50565cd8b946a2d00b0c83927b7ebb055e","published":"2023-01-30T13:09:32.141Z","modified":"2026-10-21T08:21:28.376864003Z","cvss":{"score":7.9,"severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:L/I:H/A:H"},"epss":{"score":0.03702,"percentile":0.89133,"asOf":"2026-09-15"},"cisaKev":null,"exploitsKnown":5,"affectedPackages":[],"fix":{"url":"https://github.com/torvalds/linux/commit/56b88b50565cd8b946a2d00b0c83927b7ebb055e","label":"torvalds/linux@56b88b5"},"references":[{"type":"WEB","url":"https://git.kernel.org"},{"type":"WEB","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/queue-5.10/alsa-pcm-move-rwsem-lock-inside-snd_ctl_elem_read-to-prevent-uaf.patch?id=72783cf35e6c55bca84c4bb7b776c58152856fd4"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html"},{"type":"WEB","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-0266"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/0xxx/CVE-2023-0266.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-0266"},{"type":"FIX","url":"https://github.com/torvalds/linux/commit/56b88b50565cd8b946a2d00b0c83927b7ebb055e"},{"type":"FIX","url":"https://github.com/torvalds/linux/commit/becf9e5d553c2389d857a3c178ce80fdb34a02e1"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-21T08:21:28.376864003Z"}}