CVE-2022-23901

A stack overflow re2c 2.2 exists due to infinite recursion issues in src/dfa/dead_rules.cc.

9.8 CriticalFix available

A stack overflow re2c 2.2 exists due to infinite recursion issues in src/dfa/dead_rules.cc.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

1.59%Up 0.7 points since Mar 30, 2022

What each source reports

NVD Score used 9.8

A stack overflow re2c 2.2 exists due to infinite recursion issues in src/dfa/dead_rules.cc.

Record: CVE-2022-23901
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness: CWE-787
Updated: 2026-11-02

CVE List No score

A stack overflow re2c 2.2 exists due to infinite recursion issues in src/dfa/dead_rules.cc.

Record: CVE-2022-23901
Updated: 2026-11-02

EUVDEUVD-2022-28823 No score

A stack overflow re2c 2.2 exists due to infinite recursion issues in src/dfa/dead_rules.cc.

Record: EUVD-2022-28823
Updated: 2026-11-03

GitHub AdvisoriesGHSA-37h7-52mc-gc3m 9.8

A stack overflow re2c 2.2 exists due to infinite recursion issues in src/dfa/dead_rules.cc.

A stack overflow re2c 2.2 exists due to infinite recursion issues in src/dfa/dead_rules.cc.

Record: GHSA-37h7-52mc-gc3m
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-787
Updated: 2026-11-02

OSVAZL-43948 9.8

CVE-2022-23901 affecting package re2c 2.0-1

A stack overflow re2c 2.2 exists due to infinite recursion issues in src/dfa/dead_rules.cc.

Record: AZL-43948
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVAZL-45369 9.8

CVE-2022-23901 affecting package re2c for versions less than 3.1-4

A stack overflow re2c 2.2 exists due to infinite recursion issues in src/dfa/dead_rules.cc.

Record: AZL-45369
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2022-23901 9.8

A stack overflow re2c 2.2 exists due to infinite recursion issues in src/dfa/dead_rules.cc.

Record: DEBIAN-CVE-2022-23901
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-03

OSVUBUNTU-CVE-2022-23901 9.8

A stack overflow re2c 2.2 exists due to infinite recursion issues in src/dfa/dead_rules.cc.

Record: UBUNTU-CVE-2022-23901
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSV No score

A stack overflow re2c 2.2 exists due to infinite recursion issues in src/dfa/dead_rules.cc.

Record: CVE-2022-23901
Updated: 2026-11-02

Affected products

re2c

Affected packages

Affected packages
Package	Affected	Fixed
`re2c` Azure Linux:2	through 2.0-1	None known
`re2c` Azure Linux:3	before 3.1-4	3.1-4
`re2c` Debian:12	before 3.0-1	3.0-1
`re2c` Debian:13	before 3.0-1	3.0-1
`re2c` Debian:14	before 3.0-1	3.0-1
`re2c` Ubuntu:14.04:LTS	All versions, plus listed versions 0.13.5-1build2	None known
`re2c` Ubuntu:16.04:LTS	All versions, plus listed versions 0.13.5-1build20.15.3-1ubuntu10.16-1	None known
`re2c` Ubuntu:18.04:LTS	All versions, plus listed versions 1.0.1-1	None known
`re2c` Ubuntu:20.04:LTS	All versions, plus listed versions 1.2.1-11.3-11.3-1build11.3-1ubuntu0.1	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2022-23901 is a critical vulnerability (CVSS 9.8) in Re2c, published March 29, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.59%, the 75th percentile. Fixed in re2c 3.1-4.

Attack profile

How easy it is to exploit

What an attacker can affect

Exploit likelihood

What each source reports

Affected products

Affected packages

History

In short

References