CVE-2021-32494

CRITICALNVD 10.010.0—

10.0

Radare2 has a division by zero vulnerability in Mach-O parser's rebase_buffer function. This allow attackers to create malicious inputs that can cause denial of service.

CVSS v3: 10.0
EG Score: 10.0(medium)
EPSS: 46.1%
KEV: Not listed

Published

July 7, 2023

Last Modified

November 21, 2024

Advisory Details (2)

Auto-updated May 23, 2026

No patch confirmed yet.

generic

Floating point exception on Mach-O parser · Issue #18667 · radareorg/radare2 · GitHub

https://github.com/radareorg/radare2/issues/18667

generic

Fix #18667 - division by zero in the macho parser ##bin · radareorg/radare2@a07dedb · GitHub

https://github.com/radareorg/radare2/commit/a07dedb804a82bc01c07072861942dd80c6b6d62

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-369Divide By Zero

Data Freshness Timeline

(refreshed 9× in last 7d / 9× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-24 21:48 UTCEG score recompute
2026-05-24 21:48 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2021-32494?

CVE-2021-32494 is a critical vulnerability published on July 7, 2023. Radare2 has a division by zero vulnerability in Mach-O parser's rebase_buffer function. This allow attackers to create malicious inputs that can cause denial of service.

When was CVE-2021-32494 disclosed?

CVE-2021-32494 was first published in the National Vulnerability Database on July 7, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-32494 actively exploited?

CVE-2021-32494 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 46.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-32494?

CVE-2021-32494 has a CVSS v3 base score of 10.0 (NVD).

How do I remediate CVE-2021-32494?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-32494, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-32494

Explore →

Is Your Infrastructure Affected by CVE-2021-32494?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs