🛡️ CVE-2022-27943 — fedora

🟡 CVSS 5.5 — Medium ⚠️ Exploit Public CWE-674 NVD

5.5

CVSS Score

0 Low4 Medium7 High9 Critical10

Description

libiberty/rust-demangle.c in GNU GCC 11.2 allows stack consumption in demangle_const, as demonstrated by nm-new.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Weakness class

CVE-2022-27943 is classified as CWE-674: Uncontrolled Recursion. The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.

Affected software

CVE-2022-27943 is recorded against 2 packages.

fedora
gcc

Timeline and source

Published on 26 March 2022 and last revised on 17 June 2026. A public exploit is known to exist, which raises the urgency of patching considerably. Record sourced from NVD.

References

gcc.gnu.org
lists.fedoraproject.org
sourceware.org
gcc.gnu.org
lists.fedoraproject.org
sourceware.org

CVE-2022-27943 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Debian Ubuntu 22.04 (Root.io)Ubuntu

Details

Severity MEDIUM

CVSS Score 5.5

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

CWE CWE-674

Public Exploit ⚠️ Yes

Source NVD

Published 2022-03-26

Updated 2026-08-11

Modified 2026-06-17

Fix URL N/A

Affected Packages

Software	From version	Fixed in
fedora	—	—
gcc	—	—

References

Exploit, Issue Tracking, Vendor Advisory https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105039

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H424YXGW7OKXS2NCAP35OP6Y4P4AW6VG/

Exploit, Issue Tracking, Third Party Advisory https://sourceware.org/bugzilla/show_bug.cgi?id=28995

Exploit, Issue Tracking, Vendor Advisory https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105039

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H424YXGW7OKXS2NCAP35OP6Y4P4AW6VG/

Exploit, Issue Tracking, Third Party Advisory https://sourceware.org/bugzilla/show_bug.cgi?id=28995

🔗 NVD 🔗 Mitre

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