In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7915: unlink TWT flow if the MCU rejects the agreement The flow is… (CVE-2026-90357)
A high-severity vulnerability in the Linux kernel's mt76 wifi driver for the mt7915 chipset has been resolved. The issue involves improper unlinking of a TWT (Target Wake Time) flow when the MCU rejects the agreement, leading to list corruption and potential use-after-free conditions. This flaw could result in confidentiality, integrity, and availability impacts.
AI Analysis
Technical Summary
The vulnerability in the Linux kernel's mt76 driver for the mt7915 wifi chipset occurs because the TWT flow is added to the device's twt_list before sending the agreement to the firmware. If the MCU rejects the agreement, the error path leaves the flow linked without setting the flowid_mask. Consequently, the flow slot can be reused and memset while still linked, corrupting the twt_list. Additionally, station removal leaves a dangling entry that mt7915_mac_twt_sched_list_add() later accesses, potentially causing memory corruption or crashes.
Potential Impact
Successful exploitation could lead to memory corruption within the kernel's wifi driver, resulting in denial of service (system crashes) or potentially allowing an attacker to execute arbitrary code with kernel privileges. The CVSS score of 8.8 reflects high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
A fix for this vulnerability has been implemented in the Linux kernel. Users and administrators should apply the official kernel updates that address this issue. Since this is a kernel-level vulnerability, updating to the patched kernel version is the recommended remediation. No additional mitigations are indicated.
In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7915: unlink TWT flow if the MCU rejects the agreement The flow is… (CVE-2026-90357)
Description
A high-severity vulnerability in the Linux kernel's mt76 wifi driver for the mt7915 chipset has been resolved. The issue involves improper unlinking of a TWT (Target Wake Time) flow when the MCU rejects the agreement, leading to list corruption and potential use-after-free conditions. This flaw could result in confidentiality, integrity, and availability impacts.
CVSS v3.1
Score 8.8high
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in the Linux kernel's mt76 driver for the mt7915 wifi chipset occurs because the TWT flow is added to the device's twt_list before sending the agreement to the firmware. If the MCU rejects the agreement, the error path leaves the flow linked without setting the flowid_mask. Consequently, the flow slot can be reused and memset while still linked, corrupting the twt_list. Additionally, station removal leaves a dangling entry that mt7915_mac_twt_sched_list_add() later accesses, potentially causing memory corruption or crashes.
Potential Impact
Successful exploitation could lead to memory corruption within the kernel's wifi driver, resulting in denial of service (system crashes) or potentially allowing an attacker to execute arbitrary code with kernel privileges. The CVSS score of 8.8 reflects high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
A fix for this vulnerability has been implemented in the Linux kernel. Users and administrators should apply the official kernel updates that address this issue. Since this is a kernel-level vulnerability, updating to the patched kernel version is the recommended remediation. No additional mitigations are indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-9px9-hrqm-cp96
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-90357"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6aade51e55bf5e2cf5edc160
Added to database: 09/19/2026, 01:27:58 UTC
Last enriched: 09/19/2026, 01:47:44 UTC
Last updated: 09/19/2026, 01:47:44 UTC
Views: 2
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