wifi: rtw89: add bounds check on firmware mac_id in link lookup

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Summary

CVECVE-2026-74409
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:22:42 UTC
Updated2026-08-15 06:22:42 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: wifi: rtw89: add bounds check on firmware mac_id in link lookup The mac_id field in RX descriptors is 8 bits wide (0-255), but assoc_link_on_macid[] has only RTW89_MAX_MAC_ID_NUM (128) entries. While the driver currently assigns mac_id values below 128, the descriptor value comes from firmware and is not validated before use as an array index. Add a defensive bounds check in rtw89_assoc_link_rcu_dereference() to guard against out-of-range firmware values.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 144c6cd24b3556e6e7a14271cee57a42ebf97450 ad445de67359f24088d4305c05fbd7e34c4e35e3 git Not specified
CNA Linux Linux affected 144c6cd24b3556e6e7a14271cee57a42ebf97450 920101305e7601a33b9e01019f4ca526af2526ae git Not specified
CNA Linux Linux affected 144c6cd24b3556e6e7a14271cee57a42ebf97450 6d88244bb129755acca696f9227200f4a2d106a6 git Not specified
CNA Linux Linux affected 6.14 Not specified
CNA Linux Linux unaffected 6.14 semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/ad445de67359f24088d4305c05fbd7e34c4e35e3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6d88244bb129755acca696f9227200f4a2d106a6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/920101305e7601a33b9e01019f4ca526af2526ae 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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