radare2: Infinite relocation-chain loop causes denial of service in radare2 NE parser

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-81885
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-22 16:18:03 UTC
Updated2026-09-22 16:18:03 UTC
Descriptionradare2 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.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Problem Types: CWE-770 | CWE-835 | CWE-770 CWE-770: Allocation of Resources Without Limits or Throttling | CWE-835 CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
3.1CNADECLARED5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Radareorg Radare2 affected < 6.2.0 Not specified

References

ReferenceSourceLinkTags
github.com/radareorg/radare2/pull/26192 [email protected] github.com
github.com/radareorg/radare2/issues/26225 [email protected] github.com
github.com/radareorg/radare2/security/advisories/GHSA-43wr-4j49-rcxj [email protected] github.com
github.com/radareorg/radare2/releases/tag/6.2.0 [email protected] github.com
github.com/radareorg/radare2/commit/93d794caa7c2f08413106255d49546e544c1... [email protected] github.com
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