octeontx2-af: fix out-of-bounds read setting MSI-X irq affinity

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-93246
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-24 16:17:20 UTC
Updated2026-09-24 16:17:20 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: octeontx2-af: fix out-of-bounds read setting MSI-X irq affinity rvu_register_interrupts() walks every MSI-X vector and uses strstr() to match "Mbox" or "FLR" in irq_name before pinning those interrupts to CPU 0. irq_name is a per-vector NAME_SIZE buffer, but not every slot is populated before this loop runs. strstr() keeps scanning until it finds a NUL terminator, so an uninitialized slot can trigger a KASAN slab-out-of-bounds read at boot when debug options are enabled. Use strnstr() with NAME_SIZE to bound the search within each vector's name buffer.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 4e527f1e5c155ce28164ba34cad47b635d16f827 2f460aa0211e97c011ef0cfe5016f8f2a2ed059b git Not specified
CNA Linux Linux affected 4e527f1e5c155ce28164ba34cad47b635d16f827 4d5df98369c5f45710b786499f8bd7ffc3196433 git Not specified
CNA Linux Linux affected 7.1 Not specified
CNA Linux Linux unaffected 7.1 semver Not specified
CNA Linux Linux unaffected 7.2.6 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/4d5df98369c5f45710b786499f8bd7ffc3196433 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2f460aa0211e97c011ef0cfe5016f8f2a2ed059b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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