CVE catalog

CVE-2016-9954

chicken: CVE-2016-9954

Severity: Medium
Published: Apr 21, 2017, 8:59:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 2.42% · Oct 25, 2026

The backtrack compilation code in the Irregex package (aka IrRegular Expressions) before 0.9.6 for Scheme allows remote attackers to cause a denial of service (memory consumption) via a crafted regular expression with a repeating pattern.

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	chicken	sid	`5.3.0-2`	fixed
Debian	chicken	forky	`5.3.0-2`	fixed
Debian	chicken	trixie	`5.3.0-2`	fixed
Debian	chicken	bookworm	`5.3.0-1`	fixed
Ubuntu	chicken	16.04	`4.9.0.1-1`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	chicken	source	sid	`4.12.0-0.2`	low	Not reported	[851278]
Debian	chicken	source	forky	`4.12.0-0.2`	low	Not reported	[851278]
Debian	chicken	source	trixie	`4.12.0-0.2`	low	Not reported	[851278]
Debian	chicken	source	bookworm	`4.12.0-0.2`	low	Not reported	[851278]

[Debian bug #851278]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[chicken-bin]Fixed
Source package: [chicken]
Details (2)
- 5.3.0-1 · amd64 · bookworm
  Fixed · Fixed: 4.12.0-0.2
  dsa · chicken · debian · bookworm; dsa · chicken · debian · 12
- 5.3.0-1 · arm64 · bookworm
  Fixed · Fixed: 4.12.0-0.2
  dsa · chicken · debian · bookworm; dsa · chicken · debian · 12
[libchicken11]Fixed
Source package: [chicken]
Details (2)
- 5.3.0-1 · amd64 · bookworm
  Fixed · Fixed: 4.12.0-0.2
  dsa · chicken · debian · bookworm; dsa · chicken · debian · 12
- 5.3.0-1 · arm64 · bookworm
  Fixed · Fixed: 4.12.0-0.2
  dsa · chicken · debian · bookworm; dsa · chicken · debian · 12
[libchicken-dev]Fixed
Source package: [chicken]
Details (2)
- 5.3.0-1 · amd64 · bookworm
  Fixed · Fixed: 4.12.0-0.2
  dsa · chicken · debian · bookworm; dsa · chicken · debian · 12
- 5.3.0-1 · arm64 · bookworm
  Fixed · Fixed: 4.12.0-0.2
  dsa · chicken · debian · bookworm; dsa · chicken · debian · 12

[Debian 13 (Trixie)]

[chicken-bin]Fixed
Source package: [chicken]
Details (2)
- 5.3.0-2 · amd64 · trixie
  Fixed · Fixed: 4.12.0-0.2
  dsa · chicken · debian · 13
- 5.3.0-2+b1 · arm64 · trixie
  Fixed · Fixed: 4.12.0-0.2
  dsa · chicken · debian · 13
[libchicken11t64]Fixed
Source package: [chicken]
Details (2)
- 5.3.0-2 · amd64 · trixie
  Fixed · Fixed: 4.12.0-0.2
  dsa · chicken · debian · 13
- 5.3.0-2+b1 · arm64 · trixie
  Fixed · Fixed: 4.12.0-0.2
  dsa · chicken · debian · 13
[libchicken-dev]Fixed
Source package: [chicken]
Details (2)
- 5.3.0-2 · amd64 · trixie
  Fixed · Fixed: 4.12.0-0.2
  dsa · chicken · debian · 13
- 5.3.0-2+b1 · arm64 · trixie
  Fixed · Fixed: 4.12.0-0.2
  dsa · chicken · debian · 13

Observed: Oct 23, 2026, 5:24:29 PM UTC

References

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