CVE-2021-20294: GNU Binutils

High severity, CVSS 7.8. EPSS: 3.3% chance of exploitation in the next 30 days.

A flaw was found in binutils readelf 2.35 program. An attacker who is able to convince a victim using readelf to read a crafted file could trigger a stack buffer overflow, out-of-bounds write of arbitrary data supplied by the attacker. The highest impact of this flaw is to confidentiality, integrity, and availability.

Affected products

• GNU Binutils: from 2.35, before 2.35.2 (fixed in 2.35.2)

Published 2021-04-29. Last modified 2026-06-17.