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Back to active CVEs
High · CVSS 7.8CVE-2023-53377

cifs: prevent use-after-free by freeing the cfile laterCVE-2023-53377

Answer in brief

CVE-2023-53377 records a High severity (CVSS 7.8) vulnerability in cifs: prevent use-after-free by freeing the cfile later. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 18, 2025Updated Aug 5, 2026Source checked Nov 4, 2026First seen by HOL Aug 5, 2026Material review Aug 5, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.8
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=76894f3e2f71177747b8b4763fb180e800279585 <4fe07d55a5461e66a55fbefb57f85ff0facea32b || >=76894f3e2f71177747b8b4763fb180e800279585 <b6353518ef8180816e863aa23b06456f395404d6 || >=76894f3e2f71177747b8b4763fb180e800279585 <d017880782cf71f8820ee4a2002843893176501d || >=76894f3e2f71177747b8b4763fb180e800279585 <33f736187d08f6bc822117629f263b97d3df4165 || 2d046892a493d9760c35fdaefc3017f27f91b621 || >=6.0.16 <6.14fe07d55a5461e66a55fbefb57f85ff0facea32b, b6353518ef8180816e863aa23b06456f395404d6, d017880782cf71f8820ee4a2002843893176501d, 33f736187d08f6bc822117629f263b97d3df4165, 6.1
Linux/Linuxgeneric6.1Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to 4fe07d55a5461e66a55fbefb57f85ff0facea32b if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Sep 18, 2025

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Aug 5, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 5, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
Upstream source description

In the Linux kernel, the following vulnerability has been resolved: cifs: prevent use-after-free by freeing the cfile later In smb2_compound_op we have a possible use-after-free which can cause hard to debug problems later on. This was revealed during stress testing with KASAN enabled kernel. Fixing it by moving the cfile free call to a few lines below, after the usage.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • FreeRDP before 3.32.2 Use-After-Free via rdpgfx Dynamic Virtual Channel CloseAlso CWE-416
  • FreeRDP before 3.32.2 Use-After-Free in Smartcard Emulation ReleaseContextAlso CWE-416

Record context

Vulnerability class
Memory Corruption
EPSS
Not reported
CWE IDs
CWE-416
Source
CVE List V5
Source checked
Nov 4, 2026
References
4 linked sources
Open source record