CVE-2021-31873 : faille critique klibc project klibc (CVSS 9.8)

An issue was discovered in klibc before 2.0.9. Additions in the malloc() function may result in an integer overflow and a subsequent heap buffer overflow.

Sévérité

Critique (CVSS 9.8)

Vecteur CVSS

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation active

Non signalée par la CISA

Publication

30 avr. 2021

Dernière mise à jour

17 juin 2026

• klibc project klibc
• debian debian linux

• Fiche CVE-2021-31873 sur le NVD (NIST)
• openwall.com/lists/oss-security/2021/04/30/1
• git.kernel.org/pub/scm/libs/klibc/klibc.git/commit/
• github.com/huolinjue/klibc/commit/a31ae8c508fc8d1bca4f57e…
• kernel.org/pub/linux/libs/klibc/2.0/
• lists.debian.org/debian-lts-announce/2021/06/msg00025.html
• lists.zytor.com/archives/klibc/2021-April/004593.html