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CVE-2026-54411 is an observable timing discrepancy in Linux-PAM through version 1.7.2 in pam_userdb's plaintext-password comparison path. When pam_userdb is configured to perform plaintext comparison, comparison timing varies according to password length and the number of leading bytes matching the stored credential. An attacker can repeatedly submit authentication attempts and statistically measure these differences to infer the target account's plaintext password.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
24 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A timing-discrepancy vulnerability in the linux-pam pam_userdb module that can enable recovery of plaintext passwords. It affects PAM packages on Red Hat Enterprise Linux 8 systems covered by RHSA-2026:61223.
A timing-discrepancy vulnerability in the linux-pam pam_userdb module that can enable plaintext password recovery. It affects installed PAM packages on Red Hat Enterprise Linux 8 systems covered by RHSA-2026:61225.
A timing-discrepancy vulnerability in Linux-PAM's pam_userdb module that can enable plaintext password recovery. It affects the PAM packages on Red Hat Enterprise Linux 7 systems covered by RHSA-2026:61227.
A timing-discrepancy vulnerability in Linux-PAM's pam_userdb module that can enable plaintext password recovery. It affects PAM packages on Red Hat Enterprise Linux 8 hosts covered by RHSA-2026:61224.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.