CVE catalog

CVE-2021-42383

busybox: CVE-2021-42383

[CVE catalog]

Severity
Medium · CVSS 6.6CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Published
Source
[NVD] · [CVE record]
EPSS
2.21% · Oct 25, 2026

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 evaluate function

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

DistributionPackageReleaseVersionStatus
Debianbusyboxsid1:1.38.0-3fixed
Debianbusyboxforky1:1.38.0-3fixed
Debianbusyboxtrixie1:1.37.0-6fixed
Debianbusyboxbookworm1:1.35.0-4+deb12u1fixed
Alpinebusybox3.111.31.1-r11fixed
Alpinebusybox3.121.31.1-r21fixed
Alpinebusybox3.131.32.1-r7fixed
Alpinebusybox3.141.33.1-r6fixed
Alpinebusybox3.151.34.0-r0fixed
Alpinebusybox3.161.34.0-r0fixed
Alpinebusybox3.171.34.0-r0fixed
Alpinebusybox3.181.34.0-r0fixed
Alpinebusybox3.191.34.0-r0fixed
Alpinebusybox3.201.34.0-r0fixed
Alpinebusybox3.211.34.0-r0fixed
Alpinebusybox3.221.34.0-r0fixed
Alpinebusybox3.231.34.0-r0fixed
Alpinebusybox3.241.34.0-r0fixed

Fixed-version evidence

DistributionPackageTypeReleaseFixed versionUrgencyOriginBugs
Debianbusyboxsourcesid1:1.35.0-1not yet assignedNot reported[999567]
Debianbusyboxsourceforky1:1.35.0-1not yet assignedNot reported[999567]
Debianbusyboxsourcetrixie1:1.35.0-1not yet assignedNot reported[999567]
Debianbusyboxsourcebookworm1:1.35.0-1not yet assignedNot reported[999567]
Alpinebusyboxapk3.111.31.1-r11Not reportedALPINE-CVE-2021-42383Not reported
Alpinebusyboxapk3.121.31.1-r21Not reportedALPINE-CVE-2021-42383Not reported
Alpinebusyboxapk3.131.32.1-r7Not reportedALPINE-CVE-2021-42383Not reported
Alpinebusyboxapk3.141.33.1-r6Not reportedALPINE-CVE-2021-42383Not reported
Alpinebusyboxapk3.151.34.0-r0Not reportedALPINE-CVE-2021-42383Not reported
Alpinebusyboxapk3.161.34.0-r0Not reportedALPINE-CVE-2021-42383Not reported
Alpinebusyboxapk3.171.34.0-r0Not reportedALPINE-CVE-2021-42383Not reported
Alpinebusyboxapk3.181.34.0-r0Not reportedALPINE-CVE-2021-42383Not reported
Alpinebusyboxapk3.191.34.0-r0Not reportedALPINE-CVE-2021-42383Not reported
Alpinebusyboxapk3.201.34.0-r0Not reportedALPINE-CVE-2021-42383Not reported
Alpinebusyboxapk3.211.34.0-r0Not reportedALPINE-CVE-2021-42383Not reported
Alpinebusyboxapk3.221.34.0-r0Not reportedALPINE-CVE-2021-42383Not reported
Alpinebusyboxapk3.231.34.0-r0Not reportedALPINE-CVE-2021-42383Not reported
Alpinebusyboxapk3.241.34.0-r0Not reportedALPINE-CVE-2021-42383Not reported

[Debian bug #999567]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

  • [busybox]Fixed

    Source package: [busybox]

    Details (2)

    • 1:1.35.0-4+deb12u1+b1 · amd64 · bookworm

      Fixed · Fixed: 1:1.35.0-1

      dsa · busybox · debian · bookworm; dsa · busybox · debian · 12

    • 1:1.35.0-4+deb12u1+b1 · arm64 · bookworm

      Fixed · Fixed: 1:1.35.0-1

      dsa · busybox · debian · bookworm; dsa · busybox · debian · 12

  • [busybox-static]Fixed

    Source package: [busybox]

    Details (2)

    • 1:1.35.0-4+deb12u1+b1 · amd64 · bookworm

      Fixed · Fixed: 1:1.35.0-1

      dsa · busybox · debian · bookworm; dsa · busybox · debian · 12

    • 1:1.35.0-4+deb12u1+b1 · arm64 · bookworm

      Fixed · Fixed: 1:1.35.0-1

      dsa · busybox · debian · bookworm; dsa · busybox · debian · 12

  • [busybox-syslogd]Fixed

    Source package: [busybox]

    Details (2)

    • 1:1.35.0-4+deb12u1 · all · bookworm

      Fixed · Fixed: 1:1.35.0-1

      dsa · busybox · debian · bookworm; dsa · busybox · debian · 12

    • 1:1.35.0-4+deb12u1 · all · bookworm

      Fixed · Fixed: 1:1.35.0-1

      dsa · busybox · debian · bookworm; dsa · busybox · debian · 12

  • [udhcpc]Fixed

    Source package: [busybox]

    Details (2)

    • 1:1.35.0-4+deb12u1+b1 · amd64 · bookworm

      Fixed · Fixed: 1:1.35.0-1

      dsa · busybox · debian · bookworm; dsa · busybox · debian · 12

    • 1:1.35.0-4+deb12u1+b1 · arm64 · bookworm

      Fixed · Fixed: 1:1.35.0-1

      dsa · busybox · debian · bookworm; dsa · busybox · debian · 12

  • [udhcpd]Fixed

    Source package: [busybox]

    Details (2)

    • 1:1.35.0-4+deb12u1+b1 · amd64 · bookworm

      Fixed · Fixed: 1:1.35.0-1

      dsa · busybox · debian · bookworm; dsa · busybox · debian · 12

    • 1:1.35.0-4+deb12u1+b1 · arm64 · bookworm

      Fixed · Fixed: 1:1.35.0-1

      dsa · busybox · debian · bookworm; dsa · busybox · debian · 12

[Debian 13 (Trixie)]

  • [busybox]Fixed

    Source package: [busybox]

    Details (2)

    • 1:1.37.0-6+b8 · amd64 · trixie

      Fixed · Fixed: 1:1.35.0-1

      dsa · busybox · debian · 13

    • 1:1.37.0-6+b8 · arm64 · trixie

      Fixed · Fixed: 1:1.35.0-1

      dsa · busybox · debian · 13

  • [busybox-static]Fixed

    Source package: [busybox]

    Details (2)

    • 1:1.37.0-6+b8 · amd64 · trixie

      Fixed · Fixed: 1:1.35.0-1

      dsa · busybox · debian · 13

    • 1:1.37.0-6+b8 · arm64 · trixie

      Fixed · Fixed: 1:1.35.0-1

      dsa · busybox · debian · 13

  • [busybox-syslogd]Fixed

    Source package: [busybox]

    Details (2)

    • 1:1.37.0-6 · all · trixie

      Fixed · Fixed: 1:1.35.0-1

      dsa · busybox · debian · 13

    • 1:1.37.0-6 · all · trixie

      Fixed · Fixed: 1:1.35.0-1

      dsa · busybox · debian · 13

  • [udhcpc]Fixed

    Source package: [busybox]

    Details (2)

    • 1:1.37.0-6 · all · trixie

      Fixed · Fixed: 1:1.35.0-1

      dsa · busybox · debian · 13

    • 1:1.37.0-6 · all · trixie

      Fixed · Fixed: 1:1.35.0-1

      dsa · busybox · debian · 13

  • [udhcpd]Fixed

    Source package: [busybox]

    Details (2)

    • 1:1.37.0-6 · all · trixie

      Fixed · Fixed: 1:1.35.0-1

      dsa · busybox · debian · 13

    • 1:1.37.0-6 · all · trixie

      Fixed · Fixed: 1:1.35.0-1

      dsa · busybox · debian · 13

Observed:

References

[CERT-Bund public advisories] · [CISA cybersecurity advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]