CVE-2021-31870
Critical
Published: 30 April 2021
Published
30 April 2021
Modified
21 November 2024
KEV Added
—
Patch
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CVSS Score v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score
0.0179
83.2th percentile
Risk Priority
21
60% EPSS · 20% KEV · 20% CVSS
Summary
CVE-2021-31870 is a critical-severity Integer Overflow or Wraparound (CWE-190) vulnerability in Klibc Project Klibc. Its CVSS base score is 9.8 (Critical).
Operationally, ranked in the top 16.8% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-18745
Vulnerability details
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.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
klibc project
klibc
≤ 2.0.9
debian
debian linux
9.0
Mitigating Controls
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.