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Linux Kernel mt7925 CVE-2026-53318

| EUVDEUVD-2026-39853 MEDIUM
NULL Pointer Dereference (CWE-476)
2026-06-26 Linux GHSA-36x8-5j9r-qw5f
Linux Denial Of Service Null Pointer Dereference Red Hat Suse
5.5
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
5.5 MEDIUM
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
vuln.today AI
5.5 MEDIUM

Local access with low privileges required to trigger TX path; availability-only impact via kernel panic; no confidentiality or integrity loss.

3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.0 AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE
MEDIUM
qualitative
Red Hat
5.5 MEDIUM
qualitative

Primary rating from NVD.

CVSS VectorNVD

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

5
Analysis Generated
Jul 06, 2026 - 20:44 vuln.today
CVSS changed
Jul 06, 2026 - 20:22 NVD
5.5 (MEDIUM)
Patch available
Jun 26, 2026 - 21:02 EUVD
CVE Published
Jun 26, 2026 - 19:41 nvd
MEDIUM 5.5
CVE Published
Jun 26, 2026 - 19:41 cve.org
UNKNOWN (no severity yet)

DescriptionNVD

In the Linux kernel, the following vulnerability has been resolved:

wifi: mt76: mt7925: prevent NULL pointer dereference in mt7925_tx_check_aggr()

Move the NULL check for 'sta' before dereferencing it to prevent a possible crash.

AnalysisAI

NULL pointer dereference in the Linux kernel's mt76/mt7925 WiFi driver crashes the kernel when the 'sta' pointer is dereferenced before a NULL check in mt7925_tx_check_aggr(). Systems with MediaTek mt7925 WiFi hardware running affected kernel versions are exposed to a local denial-of-service via kernel panic. No public exploit exists and EPSS is at the 5th percentile (0.16%), indicating no observed widespread exploitation; patches have been applied across multiple stable kernel branches.

Technical ContextAI

The affected code resides in the mt76 upstream WiFi driver for MediaTek mt7925 chipsets (CPE: cpe:2.3:a:linux:linux). The function mt7925_tx_check_aggr() performs aggregation checks during TX path processing and dereferences a 'sta' (station) pointer without first validating it against NULL. CWE-476 (NULL Pointer Dereference) is the root cause class - a classic defect where a pointer assumed to be valid can be NULL under certain runtime conditions (e.g., a disconnected or transitioning station entry during TX), causing an unhandled kernel exception and system crash. The driver is part of the broader mt76 subsystem used for MediaTek 802.11ax (Wi-Fi 6/6E) hardware common in consumer and enterprise laptops.

RemediationAI

Update to a patched stable kernel release: Linux 6.12.91, 6.18.33, 7.0.10, or 7.1. The upstream fixes are available at git.kernel.org stable commits 28ed0b61f673, 93d0694fb56d, b0332428a8d4, and 83ae3a18ba95. Distribution maintainers (Debian, Ubuntu, RHEL, etc.) should be tracked for corresponding package updates. If immediate patching is not feasible, a compensating control is to blacklist or unload the mt7925 driver module (modprobe -r mt7925e) on systems where the WiFi hardware is not required - this eliminates the attack surface entirely at the cost of losing WiFi functionality. Restricting local shell access to trusted users on affected systems also limits exposure given the PR:L requirement.

Same weakness CWE-476 – NULL Pointer Dereference

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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Not-Affected
SUSE Linux Enterprise Desktop 15 SP7 Not-Affected
SUSE Linux Enterprise High Availability Extension 15 SP7 Not-Affected
SUSE Linux Enterprise High Availability Extension 15 SP7 Not-Affected
SUSE Linux Enterprise High Performance Computing 15 SP7 Not-Affected

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CVE-2026-53318 vulnerability details – vuln.today
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