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CVE Record

CVE-2023-53745: um: vector: Fix memory leak in vector_config

In the Linux kernel, the following vulnerability has been resolved: um: vector: Fix memory leak in vector_config If the return value of the uml_parse_vector_ifspec function is NULL, we should call kfree(params) to prevent memory leak.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2023-53745 is a Linux kernel memory leak in the User Mode Linux vector configuration path. If a parsing function fails, allocated parameters were not freed. The sources do not provide a CVSS score, active exploitation evidence, or broad impact details.

Executive priority

Treat as a low-urgency kernel maintenance item unless UML vector networking is business-critical. The record lacks severity scoring and exploitation evidence, so prioritize normal patch cycles and targeted validation.

Technical view

The fix adds cleanup when uml_parse_vector_ifspec returns NULL in vector_config, preventing a leaked params allocation. The CVE record lists Linux kernel versions including 4.17, 4.19.276, 5.4.235, 5.10.173, 5.15.100, 6.1.18, 6.2.5, and 6.3 as affected.

Likely exposure

Exposure appears limited to Linux systems using User Mode Linux vector networking/configuration code. Most standard Linux deployments may not use this path, but distribution kernels can vary and may carry backported fixes.

Exploitation context

The source bundle says KEV is false and provides no evidence of public exploitation. Based on the description, the credible concern is resource leakage, not code execution, but exploitability details are incomplete.

Researcher notes

The evidence identifies a missing kfree(params) on a NULL return path from uml_parse_vector_ifspec. Further impact assessment needs kernel configuration context, reachable callers, privilege requirements, and distro backport mapping.

Mitigation direction

  • Update to a kernel package containing the referenced stable fixes.
  • Check your Linux distribution advisory for backported remediation status.
  • Prioritize systems using User Mode Linux or UML vector networking.
  • If patching is delayed, reduce reliance on affected UML vector functionality.

Validation and detection

  • Inventory running kernel versions across Linux hosts.
  • Identify systems using User Mode Linux vector networking.
  • Map kernel builds to vendor advisories or referenced stable commits.
  • Monitor relevant UML workloads for unexplained memory growth.
  • Confirm fixed kernels are running after maintenance windows.
Prepared
Confidence
medium
Sources
9

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-2023-53745 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
8Source 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
LinuxLinux49da7e64f33e80edffb1a9eeb230fa4c3f42dffb, 49da7e64f33e80edffb1a9eeb230fa4c3f42dffb, 49da7e64f33e80edffb1a9eeb230fa4c3f42dffb, 49da7e64f33e80edffb1a9eeb230fa4c3f42dffb, 49da7e64f33e80edffb1a9eeb230fa4c3f42dffb, 49da7e64f33e80edffb1a9eeb230fa4c3f42dffb, 49da7e64f33e80edffb1a9eeb230fa4c3f42dffbunaffected
LinuxLinux4.17, 0, 4.19.276, 5.4.235, 5.10.173, 5.15.100, 6.1.18, 6.2.5, 6.3affected
Weakness

CWE details

No CWE listed

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