CVE catalog

CVE-2018-6558

fscrypt: CVE-2018-6558

Severity: Medium
Published: Aug 23, 2018, 5:00:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.62% · Oct 25, 2026

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).

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	fscrypt	sid	`0.3.7-1`	fixed
Debian	fscrypt	forky	`0.3.7-1`	fixed
Debian	fscrypt	trixie	`0.3.5-1`	fixed
Debian	fscrypt	bookworm	`0.3.3-1`	fixed
Ubuntu	fscrypt	18.04	`0.2.2-0ubuntu2`	vulnerable
Ubuntu	fscrypt	18.04	`0.2.2-0ubuntu2.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	fscrypt	source	sid	`0.2.4-1`	not yet assigned	Not reported	[907074]
Debian	fscrypt	source	forky	`0.2.4-1`	not yet assigned	Not reported	[907074]
Debian	fscrypt	source	trixie	`0.2.4-1`	not yet assigned	Not reported	[907074]
Debian	fscrypt	source	bookworm	`0.2.4-1`	not yet assigned	Not reported	[907074]
Ubuntu	fscrypt	deb	18.04	`0.2.2-0ubuntu2.1`	Not reported	UBUNTU-CVE-2018-6558	Not reported

[Debian bug #907074]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[fscrypt]Fixed
Source package: [fscrypt]
Details (2)
- 0.3.3-1+b6 · amd64 · bookworm
  Fixed · Fixed: 0.2.4-1
  dsa · fscrypt · debian · bookworm; dsa · fscrypt · debian · 12
- 0.3.3-1+b6 · arm64 · bookworm
  Fixed · Fixed: 0.2.4-1
  dsa · fscrypt · debian · bookworm; dsa · fscrypt · debian · 12
[libpam-fscrypt]Fixed
Source package: [fscrypt]
Details (2)
- 0.3.3-1+b6 · amd64 · bookworm
  Fixed · Fixed: 0.2.4-1
  dsa · fscrypt · debian · bookworm; dsa · fscrypt · debian · 12
- 0.3.3-1+b6 · arm64 · bookworm
  Fixed · Fixed: 0.2.4-1
  dsa · fscrypt · debian · bookworm; dsa · fscrypt · debian · 12

[Debian 13 (Trixie)]

[fscrypt]Fixed
Source package: [fscrypt]
Details (2)
- 0.3.5-1+b5 · amd64 · trixie
  Fixed · Fixed: 0.2.4-1
  dsa · fscrypt · debian · 13
- 0.3.5-1+b5 · arm64 · trixie
  Fixed · Fixed: 0.2.4-1
  dsa · fscrypt · debian · 13
[libpam-fscrypt]Fixed
Source package: [fscrypt]
Details (2)
- 0.3.5-1+b5 · amd64 · trixie
  Fixed · Fixed: 0.2.4-1
  dsa · fscrypt · debian · 13
- 0.3.5-1+b5 · arm64 · trixie
  Fixed · Fixed: 0.2.4-1
  dsa · fscrypt · debian · 13

Observed: Oct 23, 2026, 5:37:33 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database]