CVEvulnerability
CVE-2026-74634
7.8 HIGH
Official page ↗
- Status
- Received
- Published
- 2026-08-22
- Last modified
- 2026-10-14
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
- 7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Description
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.
References
- https://git.kernel.org/stable/c/62978cf6347972c04130e4e841ba404504d92b32 git.kernel.org
- https://git.kernel.org/stable/c/7568e9e717e7540bd05bcc007f5d76fcaff3cdff git.kernel.org
- https://git.kernel.org/stable/c/b45b91db41379ee5fb36c187d6d7c37b725cbe8e git.kernel.org
- https://git.kernel.org/stable/c/bf98d7b0d5a99991e47e66cee4eb1d3fa514be97 git.kernel.org