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CVE Record

CVE-2023-54052: wifi: mt76: mt7921: fix skb leak by txs missing in AMSDU

In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7921: fix skb leak by txs missing in AMSDU txs may be dropped if the frame is aggregated in AMSDU. When the problem shows up, some SKBs would be hold in driver to cause network stopped temporarily. Even if the problem can be recovered by txs timeout handling, mt7921 still need to disable txs in AMSDU to avoid this issue.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel Wi-Fi driver reliability issue. Under a specific aggregation condition, the MediaTek mt7921 driver can retain network buffers and temporarily stop networking. The source describes recovery via timeout handling, but the kernel fix changes driver behavior to avoid the condition.

Executive priority

Handle through normal kernel maintenance unless affected systems rely heavily on mt7921 Wi-Fi availability. Escalate if business-critical endpoints show recurring wireless outages or vendor advisories raise severity.

Technical view

In the Linux mt76 mt7921 driver, TX status may be missing when a frame is aggregated in AMSDU. The driver can retain SKBs, temporarily stopping network traffic until timeout recovery. The resolved fix disables TX status handling in AMSDU for this path.

Likely exposure

Exposure appears limited to Linux systems using the mt76 mt7921 Wi-Fi driver on affected kernel builds. Servers without this Wi-Fi hardware or driver are unlikely to be exposed based on the provided sources.

Exploitation context

No KEV listing is provided, and the bundle does not cite active exploitation. The source does not establish attacker control, remote triggerability, privilege requirements, or exploit availability. Treat this primarily as availability risk until stronger evidence appears.

Researcher notes

The public description is narrow and lacks CVSS, CWE, CPEs, and exploitation detail. Analysis should focus on affected kernel lineage, whether the mt7921 path is present, and whether distribution kernels backported the stable commits.

Mitigation direction

  • Apply Linux kernel or distribution updates containing the referenced stable fixes.
  • Prioritize affected laptops, workstations, and embedded systems using mt7921 Wi-Fi.
  • If updates are unavailable, check vendor guidance for supported mitigations.
  • Track distribution advisories for backported kernel fixes.

Validation and detection

  • Inventory Linux systems for mt7921 or mt76 Wi-Fi driver usage.
  • Compare installed kernels with vendor-fixed builds or referenced stable commits.
  • Review wireless network interruption reports on affected endpoints.
  • Confirm post-update kernels include the mt7921 AMSDU TX status fix.
Prepared
Confidence
medium
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-2023-54052 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
0ADP providers
5Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux163f4d22c118d4eb9e275bf9ee1577c0d14b3208, 163f4d22c118d4eb9e275bf9ee1577c0d14b3208, 163f4d22c118d4eb9e275bf9ee1577c0d14b3208, 163f4d22c118d4eb9e275bf9ee1577c0d14b3208unaffected
LinuxLinux5.12, 0, 6.1.52, 6.4.15, 6.5.2, 6.6affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.