CVE-2026-5450

9.8 CRITICAL
Published: April 20, 2026 Modified: April 23, 2026
View on NVD

Description

Calling the scanf family of functions with a %mc (malloc'd character match) in the GNU C Library version 2.7 to version 2.43 with a format width specifier with an explicit width greater than 1024 could result in a one byte heap buffer overflow.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://inbox.sourceware.org/libc-announce/b11f0003-6ec1-4bd6-b9de-9e38a4efeca3@redhat.com/T/#u
Source: 3ff69d7a-14f2-4f67-a097-88dee7810d18
Third Party Advisory
https://sourceware.org/bugzilla/show_bug.cgi?id=CVE-2026-5450
Source: 3ff69d7a-14f2-4f67-a097-88dee7810d18
Exploit Issue Tracking
https://sourceware.org/bugzilla/show_bug.cgi?id=CVE-2026-5450
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Exploit Issue Tracking

3 reference(s) from NVD

Quick Stats

CVSS v3 Score
9.8 / 10.0
EPSS (Exploit Probability)
0.0%
15th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

gnu