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Back to active CVEs
Medium · CVSS 5.5CVE-2023-53684

xfrm: Zero padding when dumping algos and encapCVE-2023-53684

Answer in brief

CVE-2023-53684 records a Medium severity (CVSS 5.5) vulnerability in xfrm: Zero padding when dumping algos and encap. 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 Oct 7, 2025Updated Nov 5, 2026Source checked Nov 5, 2026First seen by HOL Oct 29, 2026Material review Nov 5, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 5.5
Exploitation
Not marked as known exploited
Affected software
5 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 5.5. 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.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:linux:linux_kernel:6.3:rc1:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:linux:linux_kernel:6.3:rc2:*:*:*:*:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=c7a5899eb26e2a4d516d53f65b6dd67be2228041 <0725daaa9a879388ed312110f62dbd5ea2d75f8f || >=c7a5899eb26e2a4d516d53f65b6dd67be2228041 <5218af4ad5d8948faac19f71583bcd786c3852df || >=c7a5899eb26e2a4d516d53f65b6dd67be2228041 <1a351e26cc010d6991fbbd5701ac16581372e26f || >=c7a5899eb26e2a4d516d53f65b6dd67be2228041 <8222d5910dae08213b6d9d4bc9a7f8502855e6240725daaa9a879388ed312110f62dbd5ea2d75f8f, 5218af4ad5d8948faac19f71583bcd786c3852df, 1a351e26cc010d6991fbbd5701ac16581372e26f, 8222d5910dae08213b6d9d4bc9a7f8502855e624
Linux/Linuxgeneric5.11Not 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 0725daaa9a879388ed312110f62dbd5ea2d75f8f if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 7, 2025

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

  2. Source modified

    Nov 5, 2026

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

  3. First seen by HOL

    Oct 29, 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: xfrm: Zero padding when dumping algos and encap When copying data to user-space we should ensure that only valid data is copied over. Padding in structures may be filled with random (possibly sensitve) data and should never be given directly to user-space. This patch fixes the copying of xfrm algorithms and the encap template in xfrm_user so that padding is zeroed.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
NVD-CWE-noinfo
Source
CVE List V5
Source checked
Nov 5, 2026
References
4 linked sources
Open source record