CVE-2021-31870
klibc - security update
9.8
CRITICAL
CVSS 3.1
EPSS 1.3%
Description
An issue was discovered in klibc before 2.0.9. Multiplication in the calloc() function may result in an integer overflow and a subsequent heap buffer overflow.
How to fix CVE-2021-31870
To remediate CVE-2021-31870, upgrade the affected package to a fixed version below.
- Debian/klibc—upgrade to 2.0.8-6 or later
- Debian/klibc—upgrade to 2.0.4-9+deb9u1 or later
Is CVE-2021-31870 being exploited?
Low — EPSS is 1.3%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 2.0.8-6
- from 0, < 2.0.4-9+deb9u1
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 |