CVE catalog

CVE-2018-19974

yara: CVE-2018-19974

Severity: Medium
Published: Dec 17, 2018, 7:29:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 1.26% · Oct 25, 2026

In YARA 3.8.1, bytecode in a specially crafted compiled rule can read uninitialized data from VM scratch memory in libyara/exec.c. This can allow attackers to discover addresses in the real stack (not the YARA virtual stack).

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	yara	sid	`4.5.8-1`	fixed
Debian	yara	forky	`4.5.8-1`	fixed
Debian	yara	trixie	`4.5.2-1`	fixed
Debian	yara	bookworm	`4.2.3-4`	fixed
Ubuntu	yara	pro	`3.6.3+dfsg-1ubuntu1`	vulnerable
Ubuntu	yara	pro	`3.7.1-1ubuntu1`	vulnerable
Ubuntu	yara	pro	`3.7.1-1ubuntu2`	vulnerable
Ubuntu	yara	pro	`3.7.1-1ubuntu2+esm1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	yara	source	sid	`3.8.1-2`	not yet assigned	Not reported	[916932]
Debian	yara	source	forky	`3.8.1-2`	not yet assigned	Not reported	[916932]
Debian	yara	source	trixie	`3.8.1-2`	not yet assigned	Not reported	[916932]
Debian	yara	source	bookworm	`3.8.1-2`	not yet assigned	Not reported	[916932]
Ubuntu	yara	deb	pro	`3.7.1-1ubuntu2+esm1`	Not reported	UBUNTU-CVE-2018-19974	Not reported

[Debian bug #916932]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libyara10]Fixed
Source package: [yara]
Details (2)
- 4.5.2-1~bpo12+1 · amd64 · bookworm-backports
  Fixed · Fixed: 3.8.1-2
  dsa · yara · debian · bookworm; dsa · yara · debian · 12
- 4.5.2-1~bpo12+1 · arm64 · bookworm-backports
  Fixed · Fixed: 3.8.1-2
  dsa · yara · debian · bookworm; dsa · yara · debian · 12
[libyara9]Fixed
Source package: [yara]
Details (2)
- 4.2.3-4 · amd64 · bookworm
  Fixed · Fixed: 3.8.1-2
  dsa · yara · debian · bookworm; dsa · yara · debian · 12
- 4.2.3-4 · arm64 · bookworm
  Fixed · Fixed: 3.8.1-2
  dsa · yara · debian · bookworm; dsa · yara · debian · 12
[libyara-dev]Fixed
Source package: [yara]
Details (4)
- 4.2.3-4 · amd64 · bookworm
  Fixed · Fixed: 3.8.1-2
  dsa · yara · debian · bookworm; dsa · yara · debian · 12
- 4.2.3-4 · arm64 · bookworm
  Fixed · Fixed: 3.8.1-2
  dsa · yara · debian · bookworm; dsa · yara · debian · 12
- 4.5.2-1~bpo12+1 · amd64 · bookworm-backports
  Fixed · Fixed: 3.8.1-2
  dsa · yara · debian · bookworm; dsa · yara · debian · 12
- 4.5.2-1~bpo12+1 · arm64 · bookworm-backports
  Fixed · Fixed: 3.8.1-2
  dsa · yara · debian · bookworm; dsa · yara · debian · 12
[yara]Fixed
Details (4)
- 4.2.3-4 · amd64 · bookworm
  Fixed · Fixed: 3.8.1-2
  dsa · yara · debian · bookworm; dsa · yara · debian · 12
- 4.2.3-4 · arm64 · bookworm
  Fixed · Fixed: 3.8.1-2
  dsa · yara · debian · bookworm; dsa · yara · debian · 12
- 4.5.2-1~bpo12+1 · amd64 · bookworm-backports
  Fixed · Fixed: 3.8.1-2
  dsa · yara · debian · bookworm; dsa · yara · debian · 12
- 4.5.2-1~bpo12+1 · arm64 · bookworm-backports
  Fixed · Fixed: 3.8.1-2
  dsa · yara · debian · bookworm; dsa · yara · debian · 12
[yara-doc]Fixed
Source package: [yara]
Details (4)
- 4.2.3-4 · all · bookworm
  Fixed · Fixed: 3.8.1-2
  dsa · yara · debian · bookworm; dsa · yara · debian · 12
- 4.2.3-4 · all · bookworm
  Fixed · Fixed: 3.8.1-2
  dsa · yara · debian · bookworm; dsa · yara · debian · 12
- 4.5.2-1~bpo12+1 · all · bookworm-backports
  Fixed · Fixed: 3.8.1-2
  dsa · yara · debian · bookworm; dsa · yara · debian · 12
- 4.5.2-1~bpo12+1 · all · bookworm-backports
  Fixed · Fixed: 3.8.1-2
  dsa · yara · debian · bookworm; dsa · yara · debian · 12

[Debian 13 (Trixie)]

[libyara10]Fixed
Source package: [yara]
Details (2)
- 4.5.2-1 · amd64 · trixie
  Fixed · Fixed: 3.8.1-2
  dsa · yara · debian · 13
- 4.5.2-1 · arm64 · trixie
  Fixed · Fixed: 3.8.1-2
  dsa · yara · debian · 13
[libyara-dev]Fixed
Source package: [yara]
Details (2)
- 4.5.2-1 · amd64 · trixie
  Fixed · Fixed: 3.8.1-2
  dsa · yara · debian · 13
- 4.5.2-1 · arm64 · trixie
  Fixed · Fixed: 3.8.1-2
  dsa · yara · debian · 13
[yara]Fixed
Details (2)
- 4.5.2-1 · amd64 · trixie
  Fixed · Fixed: 3.8.1-2
  dsa · yara · debian · 13
- 4.5.2-1 · arm64 · trixie
  Fixed · Fixed: 3.8.1-2
  dsa · yara · debian · 13
[yara-doc]Fixed
Source package: [yara]
Details (2)
- 4.5.2-1 · all · trixie
  Fixed · Fixed: 3.8.1-2
  dsa · yara · debian · 13
- 4.5.2-1 · all · trixie
  Fixed · Fixed: 3.8.1-2
  dsa · yara · debian · 13

Observed: Oct 23, 2026, 5:35:54 PM UTC

References

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