{"id":"CVE-2026-74634","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-74634","summary":"ring-buffer: Prevent subbuf order change when resizing is disabled","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nring-buffer: Prevent subbuf order change when resizing is disabled\n\nBecause ring_buffer_subbuf_order_set() frees buffer pages, we can't\nallow it when resizing is disabled. A non-consuming reader is at risk of\nuse-after-free (rb_advance_iter()).\n\nReturn -EBUSY on resize_disabled, matching ring_buffer_resize()\nbehaviour.","published":"2026-08-22T15:32:14.547Z","modified":"2026-08-24T11:47:14.121519289Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.12.104"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/62978cf6347972c04130e4e841ba404504d92b32"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7568e9e717e7540bd05bcc007f5d76fcaff3cdff"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b45b91db41379ee5fb36c187d6d7c37b725cbe8e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bf98d7b0d5a99991e47e66cee4eb1d3fa514be97"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74634.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74634"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-24T11:47:14.121519289Z"}}