CVE-2026-81880Hinoki check available

Service interruption via unbounded PEF relocation loop

Published Sep 22, 2026 · Updated Sep 22, 2026

Uncontrolled resource consumption in radare2 before 6.2.0 allows attackers to interrupt analysis by supplying a crafted PEF file. The Apple PEF loader accepts relocSecCount without bounding it to complete relocation records in the input, permitting up to 268,435,456 iterations and repeated buffer operations beyond the file data. Exploitation requires the file to be opened or inspected, after which normal format auto-detection can occupy a CPU core for an extended period.

CVSS severity5.5
Medium
EPSS probability0.14%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Uncontrolled resource consumption in radare2 before 6.2.0 allows attackers to interrupt analysis by supplying a crafted PEF file. The Apple PEF loader accepts relocSecCount without bounding it to complete relocation records in the input, permitting up to 268,435,456 iterations and repeated buffer operations beyond the file data. Exploitation requires the file to be opened or inspected, after which normal format auto-detection can occupy a CPU core for an extended period.

The record

CVE
CVE-2026-81880
Published
Sep 22, 2026
Updated
Sep 22, 2026
Vendor
radareorg
Product
radare2
Classifications
CWE-400, CWE-834, T1499.004, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 6.2.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

radareorg · radare2version=< 6.2.0

Published CVSS scores

5.5radareorgCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
CWE-834Excessive Iteration
T1499.004Application or System Exploitation
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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