CVE-2020-23914

An issue was discovered in cpp-peglib through v0.1.12. A NULL pointer dereference exists in the...

5.5 Medium

An issue was discovered in cpp-peglib through v0.1.12. A NULL pointer dereference exists in the peg::AstOptimizer::optimize() located in peglib.h. It allows an attacker to cause Denial of Service.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

0.87%Up 0.1 points since Apr 27, 2021

What each source reports

NVD Score used 5.5

An issue was discovered in cpp-peglib through v0.1.12. A NULL pointer dereference exists in the peg::AstOptimizer::optimize() located in peglib.h. It allows an attacker to cause Denial of Service.

Record: CVE-2020-23914
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:N/I:N/A:P
Weakness: CWE-476
Updated: 2026-11-02

CVE List No score

An issue was discovered in cpp-peglib through v0.1.12. A NULL pointer dereference exists in the peg::AstOptimizer::optimize() located in peglib.h. It allows an attacker to cause Denial of Service.

Record: CVE-2020-23914
Updated: 2026-11-02

EUVDEUVD-2020-16651 No score

An issue was discovered in cpp-peglib through v0.1.12. A NULL pointer dereference exists in the peg::AstOptimizer::optimize() located in peglib.h. It allows an attacker to cause Denial of Service.

Record: EUVD-2020-16651
Updated: 2026-11-03

GitHub AdvisoriesGHSA-jwwp-39q3-42p7 No score

An issue was discovered in cpp-peglib through v0.1.12. A NULL pointer dereference exists in the...

An issue was discovered in cpp-peglib through v0.1.12. A NULL pointer dereference exists in the peg::AstOptimizer::optimize() located in peglib.h. It allows an attacker to cause Denial of Service.

Record: GHSA-jwwp-39q3-42p7
Weakness: CWE-476
Updated: 2026-11-02

OSV 5.5

An issue was discovered in cpp-peglib through v0.1.12. A NULL pointer dereference exists in the peg::AstOptimizer::optimize() located in peglib.h. It allows an attacker to cause Denial of Service.

Record: CVE-2020-23914
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2020-23914 5.5

An issue was discovered in cpp-peglib through v0.1.12. A NULL pointer dereference exists in the peg::AstOptimizer::optimize() located in peglib.h. It allows an attacker to cause Denial of Service.

Record: DEBIAN-CVE-2020-23914
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2020-23914 5.5

An issue was discovered in cpp-peglib through v0.1.12. A NULL pointer dereference exists in the peg::AstOptimizer::optimize() located in peglib.h. It allows an attacker to cause Denial of Service.

Record: UBUNTU-CVE-2020-23914
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

Affected products

cpp-peglib project cpp-peglib

Affected packages

Affected packages
Package	Affected	Fixed
`retroarch` Debian:12	All versions, plus listed versions 1.14.0+dfsg-11.15.0+dfsg-11.16.0.3+dfsg-11.18.0+dfsg-11.19.1+dfsg-1 Show 6 moreShow less 1.20.0+dfsg-11.20.0+dfsg-21.20.0+dfsg-31.22.2+dfsg-11.22.2+dfsg-21.22.2+dfsg-3	None known
`retroarch` Debian:13	All versions, plus listed versions 1.20.0+dfsg-21.20.0+dfsg-31.22.2+dfsg-11.22.2+dfsg-21.22.2+dfsg-3	None known
`retroarch` Debian:14	All versions, plus listed versions 1.20.0+dfsg-21.20.0+dfsg-31.22.2+dfsg-11.22.2+dfsg-21.22.2+dfsg-3	None known
`salmon` Ubuntu:22.04:LTS	All versions, plus listed versions 1.4.0+ds1-1build1	None known
`salmon` Ubuntu:24.04:LTS	All versions, plus listed versions 1.10.2+ds1-11.10.2+ds1-1build11.10.2+ds1-1build2	None known
`retroarch` Ubuntu:Pro:24.04:LTS	All versions, plus listed versions 1.14.0+dfsg-1build11.15.0+dfsg-11.16.0.3+dfsg-11.18.0+dfsg-11.18.0+dfsg-1ubuntu0.1~esm1	None known
`retroarch` Ubuntu:25.10	All versions, plus listed versions 1.20.0+dfsg-2build11.20.0+dfsg-2build21.20.0+dfsg-31.20.0+dfsg-3ubuntu0.1	None known
`salmon` Ubuntu:25.10	All versions, plus listed versions 1.10.2+ds1-1build2	None known
`retroarch` Ubuntu:26.10	All versions, plus listed versions 1.22.2+dfsg-2ubuntu1	None known
`salmon` Ubuntu:26.10	All versions, plus listed versions 1.10.3+ds1-3	None known
`retroarch` Ubuntu:26.04:LTS	All versions, plus listed versions 1.20.0+dfsg-31.22.2+dfsg-11.22.2+dfsg-21.22.2+dfsg-2build11.22.2+dfsg-2ubuntu1	None known
`salmon` Ubuntu:26.04:LTS	All versions, plus listed versions 1.10.2+ds1-1build21.10.3+ds1-11.10.3+ds1-3	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-2020-23914 is a medium vulnerability (CVSS 5.5) in Cpp-peglib Project Cpp-peglib, published April 21, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.87%, the 59th percentile. No source names a fixed version.

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