Heap-based OOB write when parsing dwarf DIE info in Rizin

published 2021-12-13 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-30699

cvss: 7.7; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.9%; EPSS 0.9% chance of exploitation in 30 days, percentile 59%
public exploits: 0; none known

Rizin is a UNIX-like reverse engineering framework and command-line toolset. In versions up to and including 0.3.1 there is a heap-based out of bounds write in parse_die() when reversing an AMD64 ELF binary with DWARF debug info. When a malicious AMD64 ELF binary is opened by a victim user, Rizin may crash or execute unintended actions. No workaround are known and users are advised to upgrade.

Patch / fix

distros 1 links 1

rizin Arch Linux 0.3.2-1

arch linux advisories AVG-2590

github.com/rizinorg/rizin@aa69177 commit

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-43814 updated 2025-11-21 cvss 7.7

rizin: heap-based out-of-bounds write in parse_die() in librz/bin/dwarf.c when reversing an AMD64 ELF binary with DWARF debug info

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.87% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.7	CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
NVD	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	2.0	6.8	AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

rizinorg rizin

Classification

Weakness

CWE-787 Out-of-bounds Write

References

github.com /rizinorg/rizin/commit/aa6917772d2f32e5a7daab25a46c72df0b5ea406
patch, third-party-advisory
github.com /rizinorg/rizin/security/advisories/GHSA-hqqp-vjcm-mw8r
third-party-advisory
github.com /rizinorg/rizin/issues/2083
third-party-advisory

Sources

CVE List CVE-2021-43814
NVD CVE-2021-43814

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary