Vulnerability · Published Sep 22, 2026 · Assigned by GitHub_M

CVE-2026-81880radare2: Uncontrolled resource consumption in radare2 PEF loader

Medium 5.5

In plain English

A medium-severity uncontrolled resource consumption in radare2 from radareorg. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities).

Severity (CVSS 3.1)5.5Medium

Exploit odds (30 days)0.1%top 96.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

radare2 is a UNIX-like reverse engineering framework and command-line toolset. Prior to 6.2.0, radare2's Apple Preferred Executable Format loader was vulnerable because the PEF loader accepted relocSecCount values that were not bounded by the number of sections or complete relocation records in the input. The vulnerability is triggered by normal binary-format auto-detection of a small crafted Apple PEF file. The loader could perform up to 268,435,456 relocation-section iterations and repeated buffer operations after record offsets passed the end of the file. This can cause denial of service through excessive CPU consumption and prolonged processing. This issue is fixed in version 6.2.0.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Ubuntu:26.04:LTS	radare2	no fix listed	UBUNTU-CVE-2026-81880
Ubuntu:26.10	radare2	no fix listed	UBUNTU-CVE-2026-81880

Affected products (as reported)

Vendor	Product	Versions
radareorg	radare2	< 6.2.0

Weakness: CWE-400, CWE-834 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References

https://github.com/radareorg/radare2/security/advisories/GHSA-fg6f-rj8g-25pq x_refsource_CONFIRM
https://github.com/radareorg/radare2/commit/87c780e29ee6251cebaab51585d14482cb7740ac x_refsource_MISC
https://github.com/radareorg/radare2/releases/tag/6.2.0 x_refsource_MISC