Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7921: Place upper limit on station AID Any station configured with… (CVE-2026-53317)
A vulnerability in the Linux kernel's mt76 wifi driver for mt7921 hardware caused firmware crashes when a station was configured with an AID (Association ID) over 20. This issue was triggered by modified hostapd software allocating station AIDs starting at 65, which is outside the expected range and leads to firmware instability on AP interfaces. The fix places an upper limit on station AIDs to prevent such crashes. This vulnerability affects certain Linux kernel versions prior to 7.0.0-28.28 and related builds.
AI Analysis
Technical Summary
The Linux kernel mt76 wifi driver for mt7921 hardware had a vulnerability where any station configured with an AID over 20 caused a firmware crash. This was observed during testing with an AP interface on 7922 hardware using a modified hostapd from Mediatek's OpenWRT feeds, which allocated station AIDs starting at 65 instead of the standard starting point of 1. The fix implemented places an upper limit on station AIDs to prevent firmware crashes, though it does not allow AIDs over 20 to function. The issue only affected IFTYPE_AP interfaces and did not impact IFTYPE_STATION behavior. The vulnerability is tracked as CVE-2026-53317 and has a CVSS 3.1 base score of 5.5 (medium severity) with an impact on availability (firmware crash) but no confidentiality or integrity impact.
Potential Impact
The vulnerability causes a denial of service condition by crashing the wifi firmware when a station is configured with an AID over 20 on AP interfaces using affected hardware and driver versions. There is no impact on confidentiality or integrity. The crash could disrupt wifi service on affected devices. This issue does not affect station mode interfaces.
Mitigation Recommendations
A patch is available and should be applied to update the Linux kernel to versions 7.0.0-28.28 or later (and related builds as listed). After updating, a system reboot is required. The fix prevents firmware crashes by enforcing an upper limit on station AIDs. No additional mitigation steps are necessary as the patch addresses the issue directly.
Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7921: Place upper limit on station AID Any station configured with… (CVE-2026-53317)
Description
A vulnerability in the Linux kernel's mt76 wifi driver for mt7921 hardware caused firmware crashes when a station was configured with an AID (Association ID) over 20. This issue was triggered by modified hostapd software allocating station AIDs starting at 65, which is outside the expected range and leads to firmware instability on AP interfaces. The fix places an upper limit on station AIDs to prevent such crashes. This vulnerability affects certain Linux kernel versions prior to 7.0.0-28.28 and related builds.
CVSS v3.1
Score 5.5medium
Affected software
pkg:deb/ubuntu/[email protected]~16.04.1?arch=source&distro=xenialpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]~18.04.2?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]~18.04.1?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]~18.04.1?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]~18.04.1?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]~18.04.2?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]~18.04.1?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=esm-infra/focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.2?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=esm-infra/focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=focalpkg:deb/ubuntu/[email protected]+cvm1.1?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=esm-infra/focalpkg:deb/ubuntu/[email protected]~20.04.3?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=esm-infra/focalpkg:deb/ubuntu/[email protected]?arch=source&distro=focalpkg:deb/ubuntu/[email protected]?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=focalpkg:deb/ubuntu/[email protected]?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=esm-infra/focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=esm-infra/focalpkg:deb/ubuntu/[email protected]?arch=source&distro=focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=esm-infra/focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=esm-infra/focalpkg:deb/ubuntu/[email protected]~20.04.1?arch=source&distro=esm-infra/focalpkg:deb/ubuntu/[email protected]?arch=source&distro=focalpkg:deb/ubuntu/[email 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protected]~24.04.1?arch=source&distro=realtime/noblepkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resoluteRun on your own infrastructure? 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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel mt76 wifi driver for mt7921 hardware had a vulnerability where any station configured with an AID over 20 caused a firmware crash. This was observed during testing with an AP interface on 7922 hardware using a modified hostapd from Mediatek's OpenWRT feeds, which allocated station AIDs starting at 65 instead of the standard starting point of 1. The fix implemented places an upper limit on station AIDs to prevent firmware crashes, though it does not allow AIDs over 20 to function. The issue only affected IFTYPE_AP interfaces and did not impact IFTYPE_STATION behavior. The vulnerability is tracked as CVE-2026-53317 and has a CVSS 3.1 base score of 5.5 (medium severity) with an impact on availability (firmware crash) but no confidentiality or integrity impact.
Potential Impact
The vulnerability causes a denial of service condition by crashing the wifi firmware when a station is configured with an AID over 20 on AP interfaces using affected hardware and driver versions. There is no impact on confidentiality or integrity. The crash could disrupt wifi service on affected devices. This issue does not affect station mode interfaces.
Mitigation Recommendations
A patch is available and should be applied to update the Linux kernel to versions 7.0.0-28.28 or later (and related builds as listed). After updating, a system reboot is required. The fix prevents firmware crashes by enforcing an upper limit on station AIDs. No additional mitigation steps are necessary as the patch addresses the issue directly.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-53317
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:16.04:LTS","Ubuntu:18.04:LTS","Ubuntu:20.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:Nvidia-BlueField:22.04:LTS","Ubuntu:Pro:FIPS-preview:22.04:LTS","Ubuntu:Pro:FIPS-updates:22.04:LTS","Ubuntu:Pro:Realtime:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:Nvidia-BlueField:24.04:LTS","Ubuntu:Pro:FIPS-updates:24.04:LTS","Ubuntu:Pro:Realtime:24.04:LTS","Ubuntu:25.10","Ubuntu:26.04:LTS"]
- Cvss Version
- 3.1
Threat ID: 6a5a00c091ae9bcd3f7f017f
Added to database: 07/17/2026, 10:15:28 UTC
Last enriched: 09/07/2026, 21:35:35 UTC
Last updated: 09/14/2026, 22:01:35 UTC
Views: 23
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