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CVE-2026-81885

CVE-2026-81885 · radare2: Infinite relocation-chain loop causes denial of service in radare2 NE parser

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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 · EPSS 0.2%

Published
Updated

Stack: system

Affected products and versions

  • radare2

    Versions
    • < 6.2.0: Affected

    No fix published

  • radare2 Ubuntu:16.04:LTS

    Versions
    • 0.9.6-3.1ubuntu1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • radare2 Ubuntu:Pro:18.04:LTS

    Versions
    • 1.6.0+dfsg-1
    • 2.0.0+dfsg-1
    • 2.1.0+dfsg-1
    • 2.3.0+dfsg-1
    • 2.3.0+dfsg-2
    • 2.3.0+dfsg-2ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • radare2 Ubuntu:Pro:20.04:LTS

    Versions
    • 3.2.1+dfsg-5build1
    • 4.0.0+dfsg-1
    • 4.2.1+dfsg-1
    • 4.2.1+dfsg-2
    • 4.2.1+dfsg-2ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • radare2 Ubuntu:Pro:24.04:LTS

    Versions
    • 5.5.0+dfsg-1ubuntu1
    • 5.5.0+dfsg-1.1ubuntu2
    • 5.5.0+dfsg-1.1ubuntu3
    • 5.5.0+dfsg-1.1ubuntu3+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • radare2 Ubuntu:26.10

    Versions
    • 6.0.7+ds-1
    • 6.1.6+ds-2
    • 6.1.6+ds-3
    • 6.1.8+ds-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • radare2 Ubuntu:26.04:LTS

    Versions
    • 5.9.8+dfsg-2
    • 6.0.4+dfsg-1
    • 6.0.7+ds-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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