ring-buffer: Prevent subbuf order change when resizing is disabled

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74634
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-22 16:16:36 UTC
Updated2026-08-22 16:16:36 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected f9b94daa542a8d2532f0930f01cd9aec2d19621b b45b91db41379ee5fb36c187d6d7c37b725cbe8e git Not specified
CNA Linux Linux affected f9b94daa542a8d2532f0930f01cd9aec2d19621b 62978cf6347972c04130e4e841ba404504d92b32 git Not specified
CNA Linux Linux affected f9b94daa542a8d2532f0930f01cd9aec2d19621b 7568e9e717e7540bd05bcc007f5d76fcaff3cdff git Not specified
CNA Linux Linux affected f9b94daa542a8d2532f0930f01cd9aec2d19621b bf98d7b0d5a99991e47e66cee4eb1d3fa514be97 git Not specified
CNA Linux Linux affected 6.8 Not specified
CNA Linux Linux unaffected 6.8 semver Not specified
CNA Linux Linux unaffected 6.12.104 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.45 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.9 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/62978cf6347972c04130e4e841ba404504d92b32 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b45b91db41379ee5fb36c187d6d7c37b725cbe8e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7568e9e717e7540bd05bcc007f5d76fcaff3cdff 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/bf98d7b0d5a99991e47e66cee4eb1d3fa514be97 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report