ring-buffer: Initialise reader page order in rb_allocate_cpu_buffer()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74602
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-22 16:16:32 UTC
Updated2026-08-22 16:16:32 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ring-buffer: Initialise reader page order in rb_allocate_cpu_buffer() In rb_allocate_cpu_buffer(), bpage->order was omitted, leaving it as 0. This is an issue for a ring-buffer with subbufs bigger than PAGE_SIZE if when freed: free_buffer_page() relies on this value. Align the value with the actual allocation size (buffer::subbuf_order).

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected f9b94daa542a8d2532f0930f01cd9aec2d19621b 2e37f2bf111429fbfa4d985b12df3ba496ca70aa git Not specified
CNA Linux Linux affected f9b94daa542a8d2532f0930f01cd9aec2d19621b 3b3e0a6ee5bb3ac000f135beef26b2b7ed1a771a git Not specified
CNA Linux Linux affected f9b94daa542a8d2532f0930f01cd9aec2d19621b 6d014e44b68ddd43f71288d2a4dbb1a259869149 git Not specified
CNA Linux Linux affected 6.8 Not specified
CNA Linux Linux unaffected 6.8 semver Not specified
CNA Linux Linux unaffected 6.18.45 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/3b3e0a6ee5bb3ac000f135beef26b2b7ed1a771a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6d014e44b68ddd43f71288d2a4dbb1a259869149 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2e37f2bf111429fbfa4d985b12df3ba496ca70aa 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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