What is CVE-2021-46195?

CVE-2021-46195 is a medium-severity vulnerability in GNU Gcc, classified under Uncontrolled Recursion. CVSS score: 5.5/10. Published 2022-01-14.

How severe is CVE-2021-46195?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2021-46195 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in GNU Gcc

CVE-2021-46195

GCC v12.0 was discovered to contain an uncontrolled recursion via the component libiberty/rust-demangle.c. This vulnerability allows attackers to cause a Denial of Service (DoS) by consuming excessive CPU and memory resources.

Published 2022-01-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.008 (54.2th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

GNU Gcc — versions 12.0

Weakness classification (CWE)

CWE-674 — Uncontrolled Recursion

Public proof-of-concept exploits

References

gcc.gnu.org/bugzilla/show_bug.cgi (Exploit, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2021-46195?: CVE-2021-46195 is a medium-severity vulnerability in GNU Gcc, classified under Uncontrolled Recursion. CVSS score: 5.5/10. Published 2022-01-14.
How severe is CVE-2021-46195?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2021-46195 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.