| Name | CVE-2026-54411 |
| Description | Linux-PAM through 1.7.2 contains an observable timing discrepancy (CWE-208) in the pam_userdb module's plaintext-password comparison path in modules/pam_userdb/pam_userdb.c that allows a local or network-adjacent attacker able to repeatedly drive authentication through a calling service to recover the plaintext password of a target account by measuring response-timing differences. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1140190 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| pam (PTS) | bullseye | 1.4.0-9+deb11u1 | vulnerable |
| bullseye (security) | 1.4.0-9+deb11u2 | vulnerable |
| bookworm | 1.5.2-6+deb12u2 | vulnerable |
| trixie | 1.7.0-5 | vulnerable |
| forky, sid | 1.7.0-8 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| pam | source | (unstable) | (unfixed) | | | 1140190 |
Notes
[trixie] - pam <no-dsa> (Minor issue)
[bookworm] - pam <postponed> (Minor issue)
[bullseye] - pam <postponed> (Minor issue)
https://github.com/linux-pam/linux-pam/issues/992
https://github.com/linux-pam/linux-pam/pull/991
https://github.com/linux-pam/linux-pam/commit/30708d973b63891bf700299ce3ae0f1086398284