CVE-2023-5686

Heap-based Buffer Overflow in radareorg/radare2

5.1 Medium

Heap-based Buffer Overflow in GitHub repository radareorg/radare2 prior to 5.9.0.

Attack profile

How easy it is to exploit

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

What an attacker can affect

Confidentiality: Low
Integrity: None
Availability: Low

Exploit likelihood

0.80%Up 0.7 points since Oct 21, 2023

What each source reports

CVE List Score used 5.1

Heap-based Buffer Overflow in radareorg/radare2

Heap-based Buffer Overflow in GitHub repository radareorg/radare2 prior to 5.9.0.

Record: CVE-2023-5686
CVSS 3.0: 5.1 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Weakness: CWE-122
Updated: 2026-11-02

EUVDEUVD-2023-57976 5.1

Heap-based Buffer Overflow in GitHub repository radareorg/radare2 prior to 5.9.0.

Record: EUVD-2023-57976
CVSS 3.0: 5.1 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Updated: 2026-11-03

GitHub AdvisoriesGHSA-39v7-36rj-8jh4 5.1

Heap-based Buffer Overflow in GitHub repository radareorg/radare2 prior to 5.9.0.

Heap-based Buffer Overflow in GitHub repository radareorg/radare2 prior to 5.9.0.

Record: GHSA-39v7-36rj-8jh4
CVSS 3.0: 5.1 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Weakness: CWE-122, CWE-787
Updated: 2026-11-02

NVD 8.8

Heap-based Buffer Overflow in GitHub repository radareorg/radare2 prior to 5.9.0.

Record: CVE-2023-5686
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 3.0: 5.1 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Weakness: CWE-122, CWE-787
Updated: 2026-11-02

OSV 5.1

Heap-based Buffer Overflow in radareorg/radare2

Heap-based Buffer Overflow in GitHub repository radareorg/radare2 prior to 5.9.0.

Record: CVE-2023-5686
CVSS 3.0: 5.1 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Weakness: CWE-122
Updated: 2026-11-02

OSVUBUNTU-CVE-2023-5686 8.8

Heap-based Buffer Overflow in GitHub repository radareorg/radare2 prior to 5.9.0.

Record: UBUNTU-CVE-2023-5686
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 3.0: 5.1 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Updated: 2026-11-02

OSVMGASA-2024-0044 No score

Updated radare2 packages fix security vulnerabilities

This update fixes two security issues: CVE-2023-4322 - heap-buffer-overflow in the brainfuck dissassembler CVE-2023-5686 - heap-buffer-overflow in /radare2/shlr/java/code.c

Record: MGASA-2024-0044
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`radare2` Mageia:9 From an advisory covering 2 CVEs	before 5.8.8-1.1.mga9	5.8.8-1.1.mga9
`radare2` Ubuntu:16.04:LTS	All versions, plus listed versions 0.9.6-3.1ubuntu1	None known
`radare2` Ubuntu:Pro:18.04:LTS	All versions, plus listed versions 1.6.0+dfsg-12.0.0+dfsg-12.1.0+dfsg-12.3.0+dfsg-12.3.0+dfsg-22.3.0+dfsg-2ubuntu0.1~esm1	None known
`radare2` Ubuntu:Pro:20.04:LTS	All versions, plus listed versions 3.2.1+dfsg-5build14.0.0+dfsg-14.2.1+dfsg-14.2.1+dfsg-24.2.1+dfsg-2ubuntu0.1~esm1	None known
`radare2` Ubuntu:Pro:24.04:LTS	All versions, plus listed versions 5.5.0+dfsg-1ubuntu15.5.0+dfsg-1.1ubuntu25.5.0+dfsg-1.1ubuntu35.5.0+dfsg-1.1ubuntu3+esm1	None known
`radare2` Ubuntu:25.10	All versions, plus listed versions 5.9.8+dfsg-25.9.8+dfsg-2ubuntu0.25.10.15.9.8+dfsg-2ubuntu0.25.10.2	None known
`radare2` Ubuntu:26.10	All versions, plus listed versions 6.0.7+ds-16.1.6+ds-26.1.6+ds-36.1.8+ds-1	None known
`radare2` Ubuntu:26.04:LTS	All versions, plus listed versions 5.9.8+dfsg-26.0.4+dfsg-16.0.7+ds-1	None known

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 3, 2026	aliases, published	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-2023-5686 is a medium vulnerability (CVSS 5.1) in Radare Radare2, published October 20, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.80%, the 56th percentile. No source names a fixed version.

References

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