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VULNERABILITIES

CVE-2026-74634 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: kernel.orgCVSS-B:7.8 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://git.kernel.org/stable/c/62978cf6347972c04130e4e841ba404504d92b32 kernel.org
https://git.kernel.org/stable/c/7568e9e717e7540bd05bcc007f5d76fcaff3cdff kernel.org
https://git.kernel.org/stable/c/b45b91db41379ee5fb36c187d6d7c37b725cbe8e kernel.org
https://git.kernel.org/stable/c/bf98d7b0d5a99991e47e66cee4eb1d3fa514be97 kernel.org

Weakness Enumeration

No weakness enumeration is available for this CVE.

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-74634
NVD Published Date:
Aug 22, 2026
NVD Last Modified:
Aug 25, 2026
Source:
kernel.org