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CVE Record

CVE-2023-54266: media: dvb-usb: m920x: Fix a potential memory leak in m920x_i2c_xfer()

In the Linux kernel, the following vulnerability has been resolved: media: dvb-usb: m920x: Fix a potential memory leak in m920x_i2c_xfer() 'read' is freed when it is known to be NULL, but not when a read error occurs. Revert the logic to avoid a small leak, should a m920x_read() call fail.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

CVE-2023-54266 is a Linux kernel memory leak in the m920x DVB USB media driver. If an m920x read operation fails, a small allocation may not be freed. The public record does not provide CVSS, CWE, impact scale, or exploit evidence.

Executive priority

Treat as routine kernel maintenance unless exposed systems use DVB USB media hardware or custom kernels. No cited source supports emergency response, active exploitation, or broad remote impact.

Technical view

The flaw is in m920x_i2c_xfer() in the Linux kernel media dvb-usb m920x driver. The fix changes cleanup logic so the read buffer is freed on m920x_read() failure, avoiding a small leak. Multiple stable kernel commits are referenced as fixes.

Likely exposure

Exposure appears limited to Linux systems running affected kernel versions where the m920x DVB USB driver is present and reachable. General server exposure is likely limited, but embedded, desktop, or appliance builds with media/DVB USB support should be checked.

Exploitation context

The source bundle marks KEV as false and provides no evidence of active exploitation or public weaponization. The described impact is a small memory leak on read error, not code execution or privilege escalation in the cited material.

Researcher notes

The evidence is narrow: a kernel commit-level memory leak fix with no CVSS, CWE, reproducer, or operational impact detail. Triage should focus on driver reachability, kernel version lineage, and whether downstream vendor patches incorporated the stable commits.

Mitigation direction

  • Apply Linux kernel updates containing the referenced stable fixes.
  • Prioritize vendor distribution kernel advisories for production systems.
  • Check vendor guidance for temporary mitigations if patching is delayed.
  • Retire affected custom kernels where stable fixed versions are available.

Validation and detection

  • Identify running Linux kernel versions across managed assets.
  • Check whether m920x DVB USB support is built or loaded.
  • Compare kernels against affected and fixed versions in the CVE record.
  • Confirm vendor kernel packages include the referenced stable fix commits.
Prepared
Confidence
medium
Sources
7

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

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2023-54266 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
10Source 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
LinuxLinux82ce3084892c0c0e006ec61f6144f2cc4e5ece88, 7dca4428d7eb33c89979e620228fe557593fde66, fe791612afabaeee9b911bd7b955985bcf5ff314, 830e5d1b4344c2575020ee4bdf63fb48e2b56ce3, 0c044e39d52abfbb4cb43dbc5a09c1dc1ed24648, a2ab06d7c4d6bfd0b545a768247a70463e977e27, a2ab06d7c4d6bfd0b545a768247a70463e977e27, a2ab06d7c4d6bfd0b545a768247a70463e977e27, a2ab06d7c4d6bfd0b545a768247a70463e977e27, 08cb4f0da9926277101d18d817048e1328ac2563, 273cac7a89712ba6b898214af150b71dc33abe0c, b7e221dc8f23727e00a7fb6709b3318547a7c4d8, 4.14.263, 4.19.226, 5.4.174, 5.10.94, 5.15.17, 4.4.300, 4.9.298, 5.16.3unaffected
LinuxLinux5.17, 0, 4.14.326, 4.19.295, 5.4.257, 5.10.195, 5.15.132, 6.1.53, 6.4.16, 6.5.3, 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.