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High, CVSS 7.0

apko is vulnerable to attack through incorrect permissions in /etc/ld.so.cache and other files

CVE-2025-53945GHSA-x6ph-r535-3vjw

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (chainguard.dev/apko 0.29.5), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
7.0 · CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L
EPSS
  • CVE-2025-53945: 0.14% estimated exploitation activity in the next 30 days; percentile 3.59 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

It was discovered that the ld.so.cache in images generated by apko had file system permissions mode 0666: This issue was introduced in commit 04f37e2 ("generate /etc/ld.so.cache (#1629)")(v0.27.0). Impact This potentially allows a local unprivileged user to add additional additional directories including dynamic libraries to the dynamic loader path. A user could exploit this by placing a malicious library in a directory they control. Patches This issue was addressed in apko in aedb077 ("fix: /etc/ld.so.cache file permissions (#1758)") (v0.29.5). Acknowledgements Many thanks to Cody Harris from H2O.ai for reporting this issue.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-x6ph-r535-3vjw

Agent brief

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# Patch Next advisory brief: CVE-2025-53945

Advisory: apko is vulnerable to attack through incorrect permissions in /etc/ld.so.cache and other files
IDs: CVE-2025-53945, GHSA-x6ph-r535-3vjw
Record: https://patchnext.com/advisories/cve-2025-53945 (revision 1, source checked 26 Oct 2026, 15:09 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.0)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: chainguard.dev/apko 0.29.5. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go chainguard.dev/apko: affected >= 0.27.0, < 0.29.5; fixed in 0.29.5

## Suggested inspection (read-only)
- Go chainguard.dev/apko: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on chainguard.dev/apko.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-x6ph-r535-3vjw (GitHub-reviewed advisory GHSA-x6ph-r535-3vjw lists affected ranges: Go chainguard.dev/apko >=0.27.0 <0.29.5)

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