In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7996: Clear wcid pointer in mt7996_mac_sta_deinit_link() Clear… (CVE-2026-63866)
In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7996: Clear wcid pointer in mt7996_mac_sta_deinit_link() Clear WCID pointer removing the sta link in mt7996_mac_sta_deinit_link routine.
AI Analysis
Technical Summary
The Linux kernel mt76 driver for the mt7996 wireless chipset had a vulnerability where the WCID pointer was not cleared during the deinitialization of a station link in the mt7996_mac_sta_deinit_link() function. This could lead to improper handling of wireless client identifiers. The vulnerability has been resolved by ensuring the WCID pointer is cleared in this routine.
Potential Impact
The vulnerability could potentially cause improper management of wireless client identifiers within the kernel driver, which might lead to undefined behavior or stability issues in the wireless subsystem. No specific exploitation details or impacts such as privilege escalation or denial of service are provided.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to clear the WCID pointer in the mt7996_mac_sta_deinit_link() function. Users should update to the fixed kernel version once available. Patch status is not yet confirmed; check the vendor advisory for current remediation guidance.
In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7996: Clear wcid pointer in mt7996_mac_sta_deinit_link() Clear… (CVE-2026-63866)
Description
In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7996: Clear wcid pointer in mt7996_mac_sta_deinit_link() Clear WCID pointer removing the sta link in mt7996_mac_sta_deinit_link routine.
CVSS v3.1
Score 8.8high
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel mt76 driver for the mt7996 wireless chipset had a vulnerability where the WCID pointer was not cleared during the deinitialization of a station link in the mt7996_mac_sta_deinit_link() function. This could lead to improper handling of wireless client identifiers. The vulnerability has been resolved by ensuring the WCID pointer is cleared in this routine.
Potential Impact
The vulnerability could potentially cause improper management of wireless client identifiers within the kernel driver, which might lead to undefined behavior or stability issues in the wireless subsystem. No specific exploitation details or impacts such as privilege escalation or denial of service are provided.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to clear the WCID pointer in the mt7996_mac_sta_deinit_link() function. Users should update to the fixed kernel version once available. Patch status is not yet confirmed; check the vendor advisory for current remediation guidance.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-xhw4-f4c3-7c2f
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-63866"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- 3.1
Threat ID: 6a5d27ac2a4a8d598913063f
Added to database: 07/19/2026, 19:38:20 UTC
Last enriched: 07/19/2026, 20:14:43 UTC
Last updated: 09/01/2026, 10:52:10 UTC
Views: 52
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