CVE-2021-37322: GCC c++filt v2.26 was discovered to contain a use-after-free vulnerability via the component cplus-dem.c.

Q: How do I fix CVE-2021-37322?

binutils: upgrade to 2.32; gcc: upgrade to 10.1. Exact commands for each OS are on this page.

Q: Is CVE-2021-37322 being exploited?

CVE-2021-37322 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-37322 affect?

CVE-2021-37322 affects binutils, gcc. Severity is high (CVSS 7.8). GCC c++filt v2.26 was discovered to contain a use-after-free vulnerability via the component cplus-dem.c.

Q: How urgent is CVE-2021-37322?

Priority 47/100. High severity; Public exploit reference

This month

HIGH 7.8UPGRADEUPGRADE

CVE-2021-37322 is a high-severity flaw (CVSS 7.8) affecting binutils, gcc. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

GCC c++filt v2.26 was discovered to contain a use-after-free vulnerability via the component cplus-dem.c.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.9% (top 41%)
CISA exploited list	No
Weakness	CWE-416
Published	2021-11-18
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: gnu

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-11-18 22:15 UTCPublished CVE record published
2026-06-17 04:00 UTCUpdated Record last modified

gnu binutils UPGRADE

Affected: < 2.32

Fixed in: 2.32

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy binutils || rpm -q binutils || binutils --version

2. UPGRADE to 2.32 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade binutils

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade binutils

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

gnu gcc UPGRADE

Affected: < 10.1

Fixed in: 10.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy gcc || rpm -q gcc || gcc --version

2. UPGRADE to 10.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade gcc

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade gcc

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-37322?

binutils: upgrade to 2.32; gcc: upgrade to 10.1. Exact commands for each OS are on this page.

Is CVE-2021-37322 being exploited?

CVE-2021-37322 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-37322 affect?

CVE-2021-37322 affects binutils, gcc. Severity is high (CVSS 7.8). GCC c++filt v2.26 was discovered to contain a use-after-free vulnerability via the component cplus-dem.c.

How urgent is CVE-2021-37322?

Priority 47/100. High severity; Public exploit reference

Related CVEs

CVE-2026-6846 HIGH 7.8 UPGRADE MITIGATE A flaw was found in binutils
CVE-2026-6844 MEDIUM 5.5 MITIGATE MITIGATE A flaw was found in the `readelf` utility of the binutils package
CVE-2026-6845 MEDIUM 5.0 MITIGATE MITIGATE A flaw was found in binutils, specifically within the `readelf` utility
CVE-2018-18700 MEDIUM 5.5 DOWNGRADE An issue was discovered in cp-demangle.c in GNU libiberty, as distributed in GNU Binutils 2.31
CVE-2025-8224 LOW 3.3 DOWNGRADE A vulnerability has been found in GNU Binutils 2.44 and classified as problematic

References

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