CVE-2021-42386

A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the nvalloc function

Score

CVSS 3.1 7.2 High

Status

Modified - reefs@jfrog.com

Published

2021-11-15

Last modified

2025-11-03

Weaknesses

CWE-416

Affected products

• Busybox (Busybox)
• Fedora (Fedoraproject)

References

• https://claroty.com/team82/research/unboxing-busybox-14-vulnerabilities-uncovered-by-claroty-jfrog
• https://jfrog.com/blog/unboxing-busybox-14-new-vulnerabilities-uncovered-by-claroty-and-jfrog/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6T2TURBYYJGBMQTTN2DSOA…
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UQXGOGWBIYWOIVXJVRKHZR…
• https://security.netapp.com/advisory/ntap-20211223-0002/
• https://lists.debian.org/debian-lts-announce/2025/01/msg00012.html