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CVE-2026-5450 - Vulnerability Analysis

CriticalCVSS: 9.8

Last Updated: April 21, 2026

GNU C Library - Buffer Overflow

Published: April 20, 2026Updated: April 21, 2026Remote Exploitable

Overview

GNU C Library 2.7 to 2.43 contains a heap buffer overflow caused by using %mc with a format width specifier greater than 1024 in scanf functions, letting attackers cause memory corruption, exploit requires crafted input.

Severity & Score

Severity: Critical

CVSS Score: 9.8

Impact

Attackers can cause a heap buffer overflow leading to potential memory corruption or code execution.

Mitigation

Update to the latest version of GNU C Library.

References

https://inbox.sourceware.org/libc-announce/[email protected]/T/#u
https://sourceware.org/bugzilla/show_bug.cgi?id=CVE-2026-5450

Related Resources

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Details

CVE ID: CVE-2026-5450
Severity: Critical
CVSS Score: 9.8
Type: buffer_overflow
Status: unconfirmed

CWE

CWE-122

CVSS Metrics

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