wifi: mac80211: avoid out-of-bounds read for empty PREQ elements

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-98183
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-06 09:18:03 UTC
Updated2026-10-06 09:18:03 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: avoid out-of-bounds read for empty PREQ elements ieee80211_mesh_preq_size_ok() derives the location of the PREQ bottom fields before checking whether the element contains even the fixed header. ieee80211_mesh_hwmp_preq_get_bottom() reads the flags byte to account for the optional Address Extension field. Consequently, an empty PREQ element causes a one-byte read beyond its declared payload. Move the helper call after both size checks, so the bottom fields are only accessed when they are present.

Risk And Classification

EPSS: 0.001620000 probability, percentile 0.048450000 (date 2026-10-06)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 8b40b1d24a6099fe9fac8e207d4cb04ab5e0baae 3beddbd56946577478fd5e649f556aaaebe15b0a git Not specified
CNA Linux Linux affected 8b40b1d24a6099fe9fac8e207d4cb04ab5e0baae e6031f02269c0f51cf67886d177f02bc300b47cd git Not specified
CNA Linux Linux affected 7.2 Not specified
CNA Linux Linux unaffected 7.2 semver Not specified
CNA Linux Linux unaffected 7.2.8 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc4 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/e6031f02269c0f51cf67886d177f02bc300b47cd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3beddbd56946577478fd5e649f556aaaebe15b0a 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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