CVE-2026-81885
Prior to 6.2.0, radare2's NE relocation fixup-chain parser was vulnerable because the NE relocation parser followed fixup chains without an active iteration limit or cycle detection.
Does this matter?
Lower severity and a low EPSS score (0.17%). Track it; it rarely justifies an emergency change on its own.
Description
radare2 is a UNIX-like reverse engineering framework and command-line toolset. Prior to 6.2.0, radare2's NE relocation fixup-chain parser was vulnerable because the NE relocation parser followed fixup chains without an active iteration limit or cycle detection. The vulnerability is triggered by opening a crafted NE executable whose in-bounds relocation entry points back to itself instead of reaching 0xffff. The parser repeatedly processed the same relocation and allocated another relocation object on each iteration. This can cause denial of service through continuous CPU and memory consumption. This issue is fixed in version 6.2.0.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- EPSS
- 0.17% probability · 6th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-770, CWE-835
- Affected
- radare/radare2
- Source
- security-advisories@github.com
EPSS moved from 0.2% on 23 September 2026 to 0.2% on 26 October 2026.
References
- https://github.com/radareorg/radare2/commit/93d794caa7c2f08413106255d49546e544c1f9f0Patch
- https://github.com/radareorg/radare2/issues/26225Exploit, Issue Tracking, Mitigation, Vendor Advisory
- https://github.com/radareorg/radare2/pull/26192Patch
- https://github.com/radareorg/radare2/releases/tag/6.2.0Release Notes
- https://github.com/radareorg/radare2/security/advisories/GHSA-43wr-4j49-rcxjPatch, Vendor Advisory
- https://github.com/radareorg/radare2/issues/26225Exploit, Issue Tracking, Mitigation, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.