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…
Does this matter?
Lower severity and a low EPSS score (0.62%). Track it; it rarely justifies an emergency change on its own.
Description
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).
- CVSS 3.0
- 6.5 MEDIUMCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 0.62% probability · 50th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Affected
- google/fscrypt
- Source
- security@ubuntu.com
EPSS 0.6% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.