CVE-2026-22780

Memory corruption via mismatched chained-segment bounds

Published Feb 2, 2026 · Updated Feb 2, 2026

Heap overflow in Rizin before 0.8.2 allows local users to corrupt memory by opening a crafted Mach-O file for analysis. The parse_chained_fixups routine iterates to the larger of the Mach-O segment count and allocated starts table, writing past the heap buffer when the counts differ. Exploitation requires user interaction to analyze the file and can corrupt process memory or interrupt the Rizin process; no confidentiality impact is reported.

CVSS severity4.4
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap overflow in Rizin before 0.8.2 allows local users to corrupt memory by opening a crafted Mach-O file for analysis. The parse_chained_fixups routine iterates to the larger of the Mach-O segment count and allocated starts table, writing past the heap buffer when the counts differ. Exploitation requires user interaction to analyze the file and can corrupt process memory or interrupt the Rizin process; no confidentiality impact is reported.

The record

CVE
CVE-2026-22780
Published
Feb 2, 2026
Updated
Feb 2, 2026
Vendor
Rizin Organization
Product
Rizin
Classifications
CWE-770, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 2, 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=< 0.8.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Rizin Organization · Rizinversion=< 0.8.2

Published CVSS scores

4.4GitHubCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
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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