CVE-2026-54411
Fixed in a distro release EPSS <1%CVSS 5.9
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.
Products: linux-pam
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux 10 | pam | 1.6.1-9.el10_2.1 |
| AlmaLinux 10 | pam-devel | 1.6.1-9.el10_2.1 |
| AlmaLinux 10 | pam-libs | 1.6.1-9.el10_2.1 |
| AlmaLinux 8 | pam | 1.3.1-40.el8_10 |
| AlmaLinux 8 | pam-devel | 1.3.1-40.el8_10 |
| AlmaLinux 9 | pam | 1.5.1-28.el9_8.1 |
| AlmaLinux 9 | pam-devel | 1.5.1-28.el9_8.1 |
| AlmaLinux 9 | pam-docs | 1.5.1-28.el9_8.1 |
| Chainguard | linux-pam | 0 |
| Debian 12 | pam | no fix |
| Debian 13 | pam | no fix |
| Debian 14 | pam | no fix |
| Red Hat Enterprise Linux 10.2 | pam | 0:1.6.1-9.el10_2.1 |
| Red Hat Enterprise Linux 10.2 | pam-debuginfo | 0:1.6.1-9.el10_2.1 |
| Red Hat Enterprise Linux 10.2 | pam-debugsource | 0:1.6.1-9.el10_2.1 |
| Red Hat Enterprise Linux 10.2 | pam-devel | 0:1.6.1-9.el10_2.1 |
| Red Hat Enterprise Linux 10.2 | pam-libs | 0:1.6.1-9.el10_2.1 |
| Red Hat Enterprise Linux 10.2 | pam-libs-debuginfo | 0:1.6.1-9.el10_2.1 |
| Red Hat Enterprise Linux 8 | pam | 0:1.3.1-40.el8_10 |
| Red Hat Enterprise Linux 8 | pam-debuginfo | 0:1.3.1-40.el8_10 |
| Red Hat Enterprise Linux 8 | pam-debugsource | 0:1.3.1-40.el8_10 |
| Red Hat Enterprise Linux 8 | pam-devel | 0:1.3.1-40.el8_10 |
| Red Hat Enterprise Linux 9 | pam | 0:1.5.1-27.el9_8.1 |
| Red Hat Enterprise Linux 9 | pam | 0:1.5.1-28.el9_8.1 |
| Red Hat Enterprise Linux 9 | pam-debuginfo | 0:1.5.1-27.el9_8.1 |
| Red Hat Enterprise Linux 9 | pam-debuginfo | 0:1.5.1-28.el9_8.1 |
| Red Hat Enterprise Linux 9 | pam-debugsource | 0:1.5.1-27.el9_8.1 |
| Red Hat Enterprise Linux 9 | pam-debugsource | 0:1.5.1-28.el9_8.1 |
| Red Hat Enterprise Linux 9 | pam-devel | 0:1.5.1-27.el9_8.1 |
| Red Hat Enterprise Linux 9 | pam-devel | 0:1.5.1-28.el9_8.1 |
| Red Hat Enterprise Linux 9 | pam-docs | 0:1.5.1-28.el9_8.1 |
| Red Hat Enterprise Linux 9 | pam-docs | 0:1.5.1-27.el9_8.1 |
| Red Hat Enterprise Linux eus 10.0 | pam | 0:1.6.1-8.el10_0.1 |
| Red Hat Enterprise Linux eus 10.0 | pam-debuginfo | 0:1.6.1-8.el10_0.1 |
| Red Hat Enterprise Linux eus 10.0 | pam-debugsource | 0:1.6.1-8.el10_0.1 |
| Red Hat Enterprise Linux eus 10.0 | pam-devel | 0:1.6.1-8.el10_0.1 |
| Red Hat Enterprise Linux eus 10.0 | pam-libs | 0:1.6.1-8.el10_0.1 |
| Red Hat Enterprise Linux eus 10.0 | pam-libs-debuginfo | 0:1.6.1-8.el10_0.1 |
| Red Hat hummingbird 1 | pam | 0:1.7.2-1.1.hum1 |
| Red Hat hummingbird 1 | pam | 0:1.7.2-2.2.hum1 |
| Red Hat hummingbird 1 | pam-devel | 0:1.7.2-2.2.hum1 |
| Red Hat hummingbird 1 | pam-devel | 0:1.7.2-1.1.hum1 |
| Red Hat hummingbird 1 | pam-doc | 0:1.7.2-1.1.hum1 |
| Red Hat hummingbird 1 | pam-doc | 0:1.7.2-2.2.hum1 |
| Red Hat hummingbird 1 | pam-libs | 0:1.7.2-1.1.hum1 |
| Red Hat hummingbird 1 | pam-libs | 0:1.7.2-2.2.hum1 |
| Red Hat rhel aus 8.4 | pam | 0:1.3.1-14.el8_4.3 |
| Red Hat rhel aus 8.4 | pam-debuginfo | 0:1.3.1-14.el8_4.3 |
| Red Hat rhel aus 8.4 | pam-debugsource | 0:1.3.1-14.el8_4.3 |
| Red Hat rhel aus 8.4 | pam-devel | 0:1.3.1-14.el8_4.3 |
| Red Hat rhel aus 8.6 | pam | 0:1.3.1-16.el8_6.4 |
| Red Hat rhel aus 8.6 | pam-debuginfo | 0:1.3.1-16.el8_6.4 |
| Red Hat rhel aus 8.6 | pam-debugsource | 0:1.3.1-16.el8_6.4 |
| Red Hat rhel aus 8.6 | pam-devel | 0:1.3.1-16.el8_6.4 |
| Red Hat rhel e4s 8.8 | pam | 0:1.3.1-26.el8_8.3 |
| Red Hat rhel e4s 8.8 | pam-debuginfo | 0:1.3.1-26.el8_8.3 |
| Red Hat rhel e4s 8.8 | pam-debugsource | 0:1.3.1-26.el8_8.3 |
| Red Hat rhel e4s 8.8 | pam-devel | 0:1.3.1-26.el8_8.3 |
| Red Hat rhel e4s 9.2 | pam | 0:1.5.1-15.el9_2.3 |
| Red Hat rhel e4s 9.2 | pam-debuginfo | 0:1.5.1-15.el9_2.3 |
| Red Hat rhel e4s 9.2 | pam-debugsource | 0:1.5.1-15.el9_2.3 |
| Red Hat rhel e4s 9.2 | pam-devel | 0:1.5.1-15.el9_2.3 |
| Red Hat rhel e4s 9.2 | pam-docs | 0:1.5.1-15.el9_2.3 |
| Red Hat rhel e4s 9.4 | pam | 0:1.5.1-24.el9_4.2 |
| Red Hat rhel e4s 9.4 | pam-debuginfo | 0:1.5.1-24.el9_4.2 |
| Red Hat rhel e4s 9.4 | pam-debugsource | 0:1.5.1-24.el9_4.2 |
| Red Hat rhel e4s 9.4 | pam-devel | 0:1.5.1-24.el9_4.2 |
| Red Hat rhel e4s 9.4 | pam-docs | 0:1.5.1-24.el9_4.2 |
| Red Hat rhel els 7 | pam | 0:1.1.8-23.el7_9.3 |
| Red Hat rhel els 7 | pam-debuginfo | 0:1.1.8-23.el7_9.3 |
| Red Hat rhel els 7 | pam-devel | 0:1.1.8-23.el7_9.3 |
| Red Hat rhel eus 9.6 | pam | 0:1.5.1-26.el9_6.1 |
| Red Hat rhel eus 9.6 | pam-debuginfo | 0:1.5.1-26.el9_6.1 |
| Red Hat rhel eus 9.6 | pam-debugsource | 0:1.5.1-26.el9_6.1 |
| Red Hat rhel eus 9.6 | pam-devel | 0:1.5.1-26.el9_6.1 |
| Red Hat rhel eus 9.6 | pam-docs | 0:1.5.1-26.el9_6.1 |
| Red Hat rhel eus long life 8.4 | pam | 0:1.3.1-14.el8_4.3 |
| Red Hat rhel eus long life 8.4 | pam-debuginfo | 0:1.3.1-14.el8_4.3 |
| Red Hat rhel eus long life 8.4 | pam-debugsource | 0:1.3.1-14.el8_4.3 |
| Red Hat rhel eus long life 8.4 | pam-devel | 0:1.3.1-14.el8_4.3 |
| Red Hat rhel eus long life 8.6 | pam | 0:1.3.1-16.el8_6.4 |
| Red Hat rhel eus long life 8.6 | pam-debuginfo | 0:1.3.1-16.el8_6.4 |
| Red Hat rhel eus long life 8.6 | pam-debugsource | 0:1.3.1-16.el8_6.4 |
| Red Hat rhel eus long life 8.6 | pam-devel | 0:1.3.1-16.el8_6.4 |
| Red Hat rhel tus 8.8 | pam | 0:1.3.1-26.el8_8.3 |
| Red Hat rhel tus 8.8 | pam-debuginfo | 0:1.3.1-26.el8_8.3 |
| Red Hat rhel tus 8.8 | pam-debugsource | 0:1.3.1-26.el8_8.3 |
| Red Hat rhel tus 8.8 | pam-devel | 0:1.3.1-26.el8_8.3 |
| Rocky Linux 10 | pam | 0:1.6.1-9.el10_2.1 |
| Rocky Linux 8 | pam | 0:1.3.1-40.el8_10 |
| Rocky Linux 9 | pam | 0:1.5.1-28.el9_8.1 |
| SUSE Linux Enterprise Micro 5.3 | pam | 1.3.0-150000.6.89.1 |
| SUSE Linux Enterprise Micro 5.4 | pam | 1.3.0-150000.6.89.1 |
| SUSE Linux Enterprise Micro 5.5 | pam | 1.3.0-150000.6.89.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | pam | 1.3.0-150000.6.89.1 |
| SUSE Linux Enterprise Module for Development Tools 15 SP7 | pam | 1.3.0-150000.6.89.1 |
| SUSE Linux Enterprise Server 16.0 | pam | 1.7.1-160000.5.1 |
| SUSE Linux Enterprise Server 16.0 | pam-full-src | 1.7.1-160000.5.1 |
| SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 | pam | 1.1.8-24.80.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | pam | 1.7.1-160000.5.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | pam-full-src | 1.7.1-160000.5.1 |
| SUSE Linux Micro 6.0 | pam | 1.6.0-6.1 |
| SUSE Linux Micro 6.1 | pam | 1.6.1-slfo.1.1_5.1 |
| SUSE Linux Micro 6.2 | pam | 1.7.1-160000.5.1 |
| SUSE Linux Micro 6.2 | pam-full-src | 1.7.1-160000.5.1 |
| Ubuntu 22.04 LTS | pam | 1.4.0-11ubuntu2.7 |
| Ubuntu 24.04 LTS | pam | 1.5.3-5ubuntu5.6 |
| Ubuntu 25.10 | pam | no fix |
| Ubuntu 26.04 LTS | pam | 1.7.0-5ubuntu3.1 |
| Ubuntu Pro 14.04 LTS | pam | no fix |
| Ubuntu Pro 16.04 LTS | pam | no fix |
| Ubuntu Pro 18.04 LTS | pam | no fix |
| Ubuntu Pro 20.04 LTS | pam | no fix |
| Wolfi | linux-pam | 0 |
| openSUSE Leap 16.0 | pam | 1.7.1-160000.5.1 |
| openSUSE Leap 16.0 | pam-full-src | 1.7.1-160000.5.1 |
| openSUSE Tumbleweed | pam | 1.7.2+git12-2.1 |