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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
Denial Of Service Linux Null Pointer Dereference Red Hat Suse
5.5
CVSS 3.1 · NVD
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Gain local shell on mt7925 system
  2. Delivery
    Load or confirm mt7925 driver active
  3. Exploit
    Trigger TX aggregation path
  4. Execution
    Dereference NULL 'sta' pointer
  5. Persist
    Kernel panic
  6. Impact
    System crash (DoS)

Vulnerability Assessment

Weakness
CWE
CWE-476
OWASP Top 10:2025
A10:2025 - Mishandling of Exceptional Conditions
ASVS 5.0
V16 - Security Logging and Error Handling Null pointer safety, defensive checks
MITRE ATT&CK

1 technique across 1 tactic: Impact

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

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Exploitation Conditions

Exploitation requires: (1) local access with low-privilege user credentials (PR:L per CVSS vector); (2) target system must have MediaTek mt7925 WiFi hardware with the mt7925 driver loaded and active; (3) kernel version must fall within the affected commit range post-44eb173bdd4f1775e13fce483d9e44ea8929717f and prior to the respective stable-branch fix commits. What limits exploitation: remote exploitation is impossible (AV:L); the vulnerable code path is only reachable on systems with mt7925 hardware (a specific chipset, not universally present); no user interaction by another party is required, but the attacker must have an interactive session on the target. Network-only access scenarios are not affected.
Impact

Real-world risk is limited despite the High availability impact in the CVSS score. The AV:L/PR:L vector requires local authenticated access to a system with mt7925 hardware, ruling out remote exploitation. EPSS at 0.16% (5th percentile) corroborates no observed exploitation activity. The vulnerability is not listed in CISA KEV. No POC code is publicly referenced in available data. The impact is confined to a kernel panic (system crash), with no confidentiality or integrity component. This is a classic 'high-CVSS-but-low-real-risk' case: the availability impact is genuine but the attack surface is narrow - requiring physical presence or local shell access on a specific hardware platform. Priority should be routine patch deployment rather than emergency response.
Exploit ScenarioDerived

A local user with a standard shell account on a laptop equipped with a MediaTek mt7925 WiFi adapter triggers a transmit path operation - such as sustained high-throughput traffic or a rapid connect/disconnect cycle - that causes a NULL 'sta' pointer to reach mt7925_tx_check_aggr(). The kernel dereferences the pointer, generating a NULL pointer exception that results in a kernel panic and immediate system reboot or hang. No public exploit code is known at the time of analysis.
This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 06, 2026

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.

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.

Affected VersionsENISA

Linux patch: 0
Linux 44eb173bdd4f1775e13fce483d9e44ea8929717f <93d0694fb56de4628a921244d7f100c28acd2def
Linux 44eb173bdd4f1775e13fce483d9e44ea8929717f <83ae3a18ba957257b4c406273d2da2caeea2b439
Linux 44eb173bdd4f1775e13fce483d9e44ea8929717f <28ed0b61f67386c0ba1213227d350005000240fd
Linux patch: 7.1
Linux 44eb173bdd4f1775e13fce483d9e44ea8929717f <b0332428a8d4cf93752eda9e2b0d5585525e689f
Linux patch: 7.0.10
Linux patch: 6.12.91
Linux patch: 6.18.33
Linux 6.11

Affected Packages

euvd linux no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

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Technical ContextAI · show details

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.

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  • Exploit and PoC references, threat intelligence from 22 sources
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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
Red Hat 5.5 MEDIUM

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

4
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.

Threat Intelligence Overview

EPSS Score
0.2%
Top 95% exploitable
Prevalence
Low
specific MediaTek mt7925 chipset, not universally deployed
Data Quality
5 sources
Confidence: Medium
EUVD NVD CVE.org EPSS Vendor VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.2%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Defer
Exploitation· derived
None
System Exposure· derived
Small
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

28
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +28
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Null Pointer Dereference MEDIUM

A null pointer dereference occurs when a program attempts to access memory through a pointer that has been set to NULL (address 0x0).

Denial of Service MEDIUM

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

Same weakness CWE-476 – NULL Pointer Dereference

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CVE-2014-3470 MEDIUM
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CVE-2020-1967 HIGH POC
7.5
CVE-2017-3730 HIGH POC
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CVE-2017-3169 CRITICAL POC
9.8
CVE-2016-4957 HIGH
7.5
CVE-2021-3449 MEDIUM
5.9
CVE-2015-3194 HIGH
7.5

Same technique Denial Of Service

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CVE-2015-5119 CRITICAL POC
9.8
CVE-2011-2462 CRITICAL POC
9.8
CVE-2011-0611 HIGH POC
8.8
CVE-2012-1889 HIGH POC
8.8
CVE-2012-0507 CRITICAL POC
9.8
CVE-2014-1761 HIGH POC
7.8
CVE-2015-5122 CRITICAL POC
9.8
CVE-2011-0609 HIGH POC
7.8

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

References

Advisories & patches
ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-53318 ADVISORY https://ubuntu.com/security/notices/USN-8566-1 ADVISORY https://ubuntu.com/security/notices/USN-8568-1 ADVISORY https://vuldb.com/vuln/374388 REF https://git.kernel.org/stable/c/28ed0b61f67386c0ba1213227d350005000240fd REF https://git.kernel.org/stable/c/83ae3a18ba957257b4c406273d2da2caeea2b439 REF https://git.kernel.org/stable/c/93d0694fb56de4628a921244d7f100c28acd2def REF https://git.kernel.org/stable/c/b0332428a8d4cf93752eda9e2b0d5585525e689f

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