CVE-2026-81885radare2: Infinite relocation-chain loop causes denial of service in radare2 NE parser
Updated under an hour ago ()
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It affects radareorg radare2 and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 5.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-770, CWE-835
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Sep 25, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
radareorg radare2 radareorg:radare2 (from the name) | before 6.2.0 | CNA record |
radare radare2 radare:radare2 | before 6.2.0 | NVD |
References
- https://github.com/radareorg/radare2/security/advisories/GHSA-43wr-4j49-rcxjx-refsource-confirm, patch, vendor-advisory
- https://github.com/radareorg/radare2/issues/26225x-refsource-misc, exploit, issue-tracking, mitigation, vendor-advisory
- https://github.com/radareorg/radare2/pull/26192x-refsource-misc, patch
- https://github.com/radareorg/radare2/commit/93d794caa7c2f08413106255d49546e544c1f9f0x-refsource-misc, patch
- https://github.com/radareorg/radare2/releases/tag/6.2.0x-refsource-misc, release-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.