VDB

RHSA-2026:56131

RHSA-2026:56131 PUBLISHED CVSS 4.800000190734863 MEDIUM

A flaw was found in Linux-PAM's `pam_userdb` module. This vulnerability, categorized as an Observable Timing Discrepancy (CWE-208), allows a local or network-adjacent attacker to recover plaintext passwords. By repeatedly attempting authentication and measuring response-timing differences during plaintext password comparison, an attacker can deduce the password. This flaw is exploitable when the `pam_userdb` module is configured to store and compare credentials in plaintext, which is not a default setting.

Risk Scores

CVSS 3.1
4.800000190734863
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected Products

VendorProductVersions
Red Hatpam-debugsource-0:1.3.1-40.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)0:1.3.1-40.el8_10
Red Hatpam-0:1.3.1-40.el8_10.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 8)0:1.3.1-40.el8_10
Red Hatpam-debugsource-0:1.3.1-40.el8_10.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)0:1.3.1-40.el8_10
Red Hatpam-devel-0:1.3.1-40.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)0:1.3.1-40.el8_10
Red Hatpam-devel-0:1.3.1-40.el8_10.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)0:1.3.1-40.el8_10
Red Hatpam-0:1.3.1-40.el8_10.src as a component of Red Hat Enterprise Linux BaseOS (v. 8)0:1.3.1-40.el8_10
Red Hatpam-devel-0:1.3.1-40.el8_10.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)0:1.3.1-40.el8_10
Red Hatpam-debuginfo-0:1.3.1-40.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)0:1.3.1-40.el8_10
Red Hatpam-debuginfo-0:1.3.1-40.el8_10.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)0:1.3.1-40.el8_10
Red Hatpam-debugsource-0:1.3.1-40.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)0:1.3.1-40.el8_10
Red Hatpam-0:1.3.1-40.el8_10.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)0:1.3.1-40.el8_10
Red Hatpam-0:1.3.1-40.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)0:1.3.1-40.el8_10
Red Hatpam-debugsource-0:1.3.1-40.el8_10.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 8)0:1.3.1-40.el8_10
Red Hatpam-0:1.3.1-40.el8_10.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)0:1.3.1-40.el8_10
Red Hatpam-debugsource-0:1.3.1-40.el8_10.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)0:1.3.1-40.el8_10
Red Hatpam-devel-0:1.3.1-40.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)0:1.3.1-40.el8_10
Red Hatpam-0:1.3.1-40.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)0:1.3.1-40.el8_10
Red Hatpam-devel-0:1.3.1-40.el8_10.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 8)0:1.3.1-40.el8_10
Red Hatpam-debuginfo-0:1.3.1-40.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)0:1.3.1-40.el8_10
Red Hatpam-debuginfo-0:1.3.1-40.el8_10.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 8)0:1.3.1-40.el8_10

…and 1 more

Timeline

  • Aug 18, 2026 CVE Published
  • Aug 18, 2026 CVE Updated
  • Aug 18, 2026 Distribution Patch
  • Aug 18, 2026 Distribution Patch
  • Aug 18, 2026 Security Advisory
  • Aug 18, 2026 Security Advisory

References

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