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CVE-2021-46195

20
FAUCET Score

CVE-2021-46195 describes an uncontrolled recursion vulnerability in GCC v12.0, specifically within the libiberty/rust-demangle.c component. This medium-severity flaw (CVSS 5.5) allows an attacker to trigger a Denial of Service (DoS) by causing the system to consume excessive CPU and memory resources, requiring user interaction (UI:R) for exploitation. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
12.0CPE matchmatch criteria
cpe:2.3:a:gnu:gcc:12.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.78%
Probability of exploitation in next 30 days
EPSS Percentile
52.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0078 is in the 59th percentile among its peer group of 5,765 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: mingw-gcc-0:12.0.1-11.2.el9
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: gcc-toolset-11-gcc

Vendor Advisories (1)

redhatCVE-2021-46195Low

gcc: uncontrolled recursion in libiberty/rust-demangle.c

Jan 29, 2021

References

gcc.gnu.org / bugzilla/show_bug.cgi
ExploitIssue TrackingVendor Advisory