CVE-2018-6558

The pam_fscrypt module in fscrypt before 0.2.4 may incorrectly restore primary and supplementary group IDs to the values associated with the root user, which allows attackers to gain privileges via a successful login through certain applications that use Linux-PAM (aka pam).

• https://github.com/google/fscrypt/commit/3022c1603d968c22f147b4a2c49c4637dd1be91bPatch, Third Party Advisory
• https://github.com/google/fscrypt/commit/315f9b042237200174a1fb99427f74027e191d66Patch, Third Party Advisory
• https://github.com/google/fscrypt/issues/77Issue Tracking, Third Party Advisory
• https://launchpad.net/bugs/1787548Issue Tracking, Patch, Third Party Advisory
• https://github.com/google/fscrypt/commit/3022c1603d968c22f147b4a2c49c4637dd1be91bPatch, Third Party Advisory
• https://github.com/google/fscrypt/commit/315f9b042237200174a1fb99427f74027e191d66Patch, Third Party Advisory
• https://github.com/google/fscrypt/issues/77Issue Tracking, Third Party Advisory
• https://launchpad.net/bugs/1787548Issue Tracking, Patch, Third Party Advisory

Published

Aug 23, 2018

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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