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      <title>CVE-2026-54411 — Linux-PAM pam_userdb Observable Timing Discrepancy in Plaintext Password Comparison</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-54411</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux-PAM&lt;/p&gt;
&lt;p&gt;Linux-PAM through 1.7.2 contains an observable timing discrepancy (CWE-208) in the pam_userdb module&amp;#39;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.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux-PAM&lt;/p&gt;
&lt;p&gt;Linux-PAM through 1.7.2 contains an observable timing discrepancy (CWE-208) in the pam_userdb module&amp;#39;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.&lt;/p&gt;</content:encoded>
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