wifi: mt76: mt7996: reserve space for the CSA-abort countdown TLV

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Summary

CVECVE-2026-90366
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 17:17:35 UTC
Updated2026-10-19 09:19:30 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7996: reserve space for the CSA-abort countdown TLV When a CSA countdown is active, mt7996_mcu_beacon_cntdwn() emits two bss_bcn_cntdwn_tlv entries (the CSA countdown and the CCA-abort BCC), but MT7996_BEACON_UPDATE_SIZE only reserved one. With MBSSID enabled and a near-maximum beacon template the extra 8 bytes could push the offload command past MT7996_MAX_BSS_OFFLOAD_SIZE and trigger skb_over_panic(). Reserve room for both countdown TLVs.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 98686cd21624c75a043e96812beadddf4f6f48e5 1d348f96623ec20d700af7d4dfc00a74da6238ac git Not specified
CNA Linux Linux affected 98686cd21624c75a043e96812beadddf4f6f48e5 bc1d694a1ffe0062c3adf0db1d64ad54454398ec git Not specified
CNA Linux Linux affected 98686cd21624c75a043e96812beadddf4f6f48e5 45d8896e4cffffb2c6554ccbec6efe7a0d53166f git Not specified
CNA Linux Linux affected 98686cd21624c75a043e96812beadddf4f6f48e5 1a51aff0e048dc5b8252d65808b79939c942d6ec git Not specified
CNA Linux Linux affected 98686cd21624c75a043e96812beadddf4f6f48e5 50c66bab321140c49aa2ed779a3ec9d2f085b458 git Not specified
CNA Linux Linux affected 6.2 Not specified
CNA Linux Linux unaffected 6.2 semver Not specified
CNA Linux Linux unaffected 6.6.157 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.110 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.52 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.6 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/bc1d694a1ffe0062c3adf0db1d64ad54454398ec 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/45d8896e4cffffb2c6554ccbec6efe7a0d53166f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1d348f96623ec20d700af7d4dfc00a74da6238ac 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/50c66bab321140c49aa2ed779a3ec9d2f085b458 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1a51aff0e048dc5b8252d65808b79939c942d6ec 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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