CVE-2026-5450
9.8
CRITICAL
CVSS 3.1
EPSS 0.07%
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.
How to fix CVE-2026-5450
No fixed version has been published yet. Mitigate by removing the affected package or applying upstream guidance from the references below.
- Debian/glibc—no fix listed
Is CVE-2026-5450 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |