CVE catalog

CVE-2026-88341

Severity: Medium · CVSS 5.5CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Published: Sep 22, 2026, 12:00:00 AM UTC
Updated: Sep 22, 2026, 8:17:10 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.15% · Oct 25, 2026

A reachable assertion vulnerability exists in YARA 4.5.8 when loading crafted .yrc compiled rule files. An attacker can provide a malicious file with an invalid arena configuration (num_buffers=0) that triggers an assertion failure in yr_arena_get_ptr(), causing the application to terminate.

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`	vulnerable
Debian	yara	forky	`4.5.8-1`	vulnerable
Debian	yara	trixie	`4.5.2-1`	vulnerable
Debian	yara	bookworm	`4.2.3-4`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	yara	source	sid	`(unfixed)`	not yet assigned	Not reported	[1148825]
Debian	yara	source	forky	`(unfixed)`	not yet assigned	Not reported	[1148825]
Debian	yara	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1148825]
Debian	yara	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1148825]

[Debian bug #1148825]

Notes

[trixie] yara: Minor issue [bookworm] yara: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

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

[Debian 13 (Trixie)]

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

Observed: Oct 23, 2026, 8:36:13 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]