CVE-2026-74634
- Source
- https://cve.org/CVERecord?id=CVE-2026-74634
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74634.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-74634
- Downstream
- Published
- 2026-08-22T15:32:14Z
- Modified
- 2026-08-27T11:30:40Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- ring-buffer: Prevent subbuf order change when resizing is disabled
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
ring-buffer: Prevent subbuf order change when resizing is disabled
Because ring_buffer_subbuf_order_set() frees buffer pages, we can't allow it when resizing is disabled. A non-consuming reader is at risk of use-after-free (rb_advance_iter()).
Return -EBUSY on resize_disabled, matching ring_buffer_resize() behaviour.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74634.json" }- References
-
- https://git.kernel.org/stable/c/62978cf6347972c04130e4e841ba404504d92b32
- https://git.kernel.org/stable/c/7568e9e717e7540bd05bcc007f5d76fcaff3cdff
- https://git.kernel.org/stable/c/b45b91db41379ee5fb36c187d6d7c37b725cbe8e
- https://git.kernel.org/stable/c/bf98d7b0d5a99991e47e66cee4eb1d3fa514be97
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74634.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-74634
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / 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
-
Introducedf9b94daa542a8d2532f0930f01cd9aec2d19621bFixedb45b91db41379ee5fb36c187d6d7c37b725cbe8eFixed62978cf6347972c04130e4e841ba404504d92b32Fixed7568e9e717e7540bd05bcc007f5d76fcaff3cdffFixedbf98d7b0d5a99991e47e66cee4eb1d3fa514be97