CVE-2026-5450

UNKNOWN 0.0

scanf %mc off-by-one heap buffer overflow

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-122
Vendor	the gnu c library
Product	glibc
Published	Apr 20, 2026

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Affected Versions

The GNU C Library / glibc

2.7 < *

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Rocket Ma