wifi: mt76: mt7921: Place upper limit on station AID

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Summary

CVECVE-2026-53317
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-26 20:17:25 UTC
Updated2026-06-26 20:17:25 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7921: Place upper limit on station AID Any station configured with an AID over 20 causes a firmware crash. This situation occurred in our testing using an AP interface on 7922 hardware, with a modified hostapd, sourced from Mediatek's OpenWRT feeds. In stock hostapd, station AIDs begin counting at 1, and this configuration is prevented with an upper limit on associated stations. However, the modified hostapd began allocation at 65, which caused the firmware to crash. This fix does not allow these AIDs to work, but will prevent the firmware crash. This crash was only seen on IFTYPE_AP interfaces, and the fix does not appear to have an effect on IFTYPE_STATION behavior.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 5c14a5f944b91371961548b1907802f74a4d2e5c 6dbe70f9ef14d8ac1c24bf19fd9510978a3ab952 git Not specified
CNA Linux Linux affected 5c14a5f944b91371961548b1907802f74a4d2e5c 35835ff71e6e618155578b8e3905597edd5f601c git Not specified
CNA Linux Linux affected 5c14a5f944b91371961548b1907802f74a4d2e5c 1a4b802afe15c5b33b2dcb37a594aba2fa215d52 git Not specified
CNA Linux Linux affected 5c14a5f944b91371961548b1907802f74a4d2e5c 4d0bf21e3e20619d51d06c0c36207aabab8b712c git Not specified
CNA Linux Linux affected 5.12 Not specified
CNA Linux Linux unaffected 5.12 semver Not specified
CNA Linux Linux unaffected 6.12.91 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.33 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.10 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/1a4b802afe15c5b33b2dcb37a594aba2fa215d52 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4d0bf21e3e20619d51d06c0c36207aabab8b712c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/35835ff71e6e618155578b8e3905597edd5f601c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6dbe70f9ef14d8ac1c24bf19fd9510978a3ab952 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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