CVE-2026-74634

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.

CVSS 3.1

7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.1% chance of exploitation in the next 30 days; higher than 2% of CVEs (scores of 2026-10-25)

Published

2026-08-22

Modified

2026-10-14

Record from

the NVD, synced 2026-10-19

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

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