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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade pamUpgrade pam-develUpgrade pam-docs | Oct 11, 2026 | Aug 18, 2026 |
| Redhat_linux | — | Upgrade pam-debuginfoUpgrade pam-libs-debuginfoUpgrade pam-develNo solution existsUpgrade pamUpgrade pam-libsUpgrade pam-debugsourceUpgrade pam-docs | Jul 17, 2026 | Jun 14, 2026 |
| Rocky_linux | — | Upgrade pamUpgrade pam-develUpgrade pam-libs-debuginfoUpgrade pam-debuginfoUpgrade pam-debugsourceUpgrade pam-docsUpgrade pam-libs | Aug 20, 2026 | Aug 19, 2026 |
| Ubuntu | — | Upgrade libpam-modules | Jul 26, 2026 | Jul 23, 2026 |
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