CVE-2026-81885: CWE-770: Allocation of Resources Without Limits or Throttling in radareorg radare2
CVE-2026-81885 is a resource exhaustion vulnerability in radare2 prior to version 6.2.0. The NE relocation fixup-chain parser lacks iteration limits or cycle detection, allowing crafted NE executables to cause repeated processing of the same relocation entry. This leads to continuous CPU and memory consumption, resulting in denial of service. The issue is fixed in radare2 version 6.2.0.
AI Analysis
Technical Summary
radare2's NE relocation fixup-chain parser before version 6.2.0 does not enforce limits or detect cycles when following relocation fixup chains. An attacker can craft an NE executable with a relocation entry that loops back to itself instead of terminating, causing the parser to repeatedly allocate relocation objects indefinitely. This results in excessive CPU and memory usage, causing a denial of service condition. The vulnerability is addressed by fixes introduced in version 6.2.0.
Potential Impact
An attacker can cause a denial of service by triggering continuous CPU and memory consumption when radare2 parses a specially crafted NE executable. There is no impact on confidentiality or integrity. The vulnerability affects availability by exhausting system resources.
Mitigation Recommendations
Upgrade radare2 to version 6.2.0 or later, where this vulnerability is fixed. No other mitigation is required as the issue is resolved in the official update.
CVE-2026-81885: CWE-770: Allocation of Resources Without Limits or Throttling in radareorg radare2
Description
CVE-2026-81885 is a resource exhaustion vulnerability in radare2 prior to version 6.2.0. The NE relocation fixup-chain parser lacks iteration limits or cycle detection, allowing crafted NE executables to cause repeated processing of the same relocation entry. This leads to continuous CPU and memory consumption, resulting in denial of service. The issue is fixed in radare2 version 6.2.0.
CVSS v3.1
Score 5.5medium
Affected software
radareorg
radare2
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
radare2's NE relocation fixup-chain parser before version 6.2.0 does not enforce limits or detect cycles when following relocation fixup chains. An attacker can craft an NE executable with a relocation entry that loops back to itself instead of terminating, causing the parser to repeatedly allocate relocation objects indefinitely. This results in excessive CPU and memory usage, causing a denial of service condition. The vulnerability is addressed by fixes introduced in version 6.2.0.
Potential Impact
An attacker can cause a denial of service by triggering continuous CPU and memory consumption when radare2 parses a specially crafted NE executable. There is no impact on confidentiality or integrity. The vulnerability affects availability by exhausting system resources.
Mitigation Recommendations
Upgrade radare2 to version 6.2.0 or later, where this vulnerability is fixed. No other mitigation is required as the issue is resolved in the official update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-08-27T17:48:42.122Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ab29c3cf7a7c54106580d69
Added to database: 09/22/2026, 15:18:20 UTC
Last enriched: 09/22/2026, 15:32:42 UTC
Last updated: 09/22/2026, 15:50:48 UTC
Views: 5
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