What’s Vulnerable › Vulnerabilities

CVE-2026-22780: Rizin has a heap overflow on mach0_chained_fixups.c

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-02-02 · updated 2026-06-17
• Weakness: CWE-770

Description

Rizin is a UNIX-like reverse engineering framework and command-line toolset. Prior to 0.8.2, a heap overflow can be exploited when a malicious mach0 file, having bogus entries for the dyld chained segments, is parsed by rizin. This vulnerability is fixed in 0.8.2.

Affected products

• rizinorg rizin: before 0.8.2 — fixed in 0.8.2

How to fix

Upgrade to a fixed version: rizinorg rizin 0.8.2. Check the vendor advisory for mitigations.

References

• https://github.com/rizinorg/rizin/blob/6dd0dba9ff4dc706f549d0cdcd93856b49e59aa0/librz/bin/format/mach0/mach0_chained_fixups.c#L200
• https://github.com/rizinorg/rizin/commit/41ea75d5b07d9b41b27ae80675cdda65f1b1c989
• https://github.com/rizinorg/rizin/issues/5768
• https://github.com/rizinorg/rizin/pull/5770
• https://github.com/rizinorg/rizin/releases/tag/v0.8.2
• https://github.com/rizinorg/rizin/security/advisories/GHSA-f3v7-xhmj-9cjj

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