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Fencer Vulns
high 7.1

CVE-2021-3549 json

An out of bounds flaw was found in GNU binutils objdump utility version 2.36.

published 2021-05-26 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-26860

cvss
7.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 62%
public exploits
0
none known

Summary

An out of bounds flaw was found in GNU binutils objdump utility version 2.36. An attacker could use this flaw and pass a large section to avr_elf32_load_records_from_section() probably resulting in a crash or in some cases memory corruption. The highest threat from this vulnerability is to integrity as well as system availability.

Patch / fix

  • binutils Debian 14, Debian 13, Debian 12 2.37-3

debian advisories DEBIAN-CVE-2021-3549

  • binutils Ubuntu 22.04 LTS 2.37-7ubuntu1

ubuntu advisories UBUNTU-CVE-2021-3549

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • binutils Arch Linux 2.37-1

arch linux advisories AVG-2002

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-2021-3549 updated cvss 6.1

binutils: heap-based buffer overflow in avr_elf32_load_records_from_section() via large section parameter

  • Red Hat Enterprise Linux 6 binutils Red Hat Enterprise Linux 7 binutils Red Hat Enterprise Linux 8 binutils, gcc-toolset-9-binutils, gcc-toolset-10-binutils Red Hat Enterprise Linux 9 binutils, binutils-gold
    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

0.97% chance of exploitation in the next 30 days, higher than 62% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
NVD 2.0 5.8 AV:N/AC:M/Au:N/C:N/I:P/A:P

Affected products

  • n/a binutils

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
  • CWE-787 Out-of-bounds Write

References

Sources

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.