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.
References10
- access.redhat.com/errata/RHSA-2026:1696
- access.redhat.com/errata/RHSA-2026:1852
- access.redhat.com/errata/RHSA-2026:1913
- access.redhat.com/errata/RHSA-2026:2485
- access.redhat.com/errata/RHSA-2026:2563
- access.redhat.com/errata/RHSA-2026:2737
- access.redhat.com/errata/RHSA-2026:2800
- access.redhat.com/errata/RHSA-2026:3406
- access.redhat.com/errata/RHSA-2026:4943
- access.redhat.com/errata/RHSA-2026:7180
Metrics
- CVSS 3.1
-
6.1
MEDIUM
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H - EPSS — exploit probability
- 0% percentile: 12 · as of 11 November 2026
- CWE
- CWE-125
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.