Rizin has a heap overflow on mach0_chained_fixups.c

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.

Scores

EPSS (exploitation in 30 days)

0.20% · top 90% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.4.

Weakness

• CWE-770: Allocation of Resources Without Limits or Throttling (opens in a new tab)All about CWE-770 and its CVEs

Affected products

• rizinorg · rizin

  • affected < 0.8.2

References (6)

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

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-22780](https://trackcve.app/badge/CVE-2026-22780.svg)](https://trackcve.app/cve/CVE-2026-22780)

Record last updated 3 Feb 2026, 15:37 UTC.