5.5

CVE-2023-42365: busybox Use After Free

CVSS: 5.5v3.1MediumModified
AliasesALPINE-CVE-2023-42365UBUNTU-CVE-2023-42365DEBIAN-CVE-2023-42365
Published 27-11-2023Last modified 03-11-2025
Open JSON

Vulnerability summary

CVE-2023-42365 is a medium (CVSS 5.5) Use After Free vulnerability in busybox. EPSS estimates a 0.39% chance of exploitation in the next 30 days, higher than 31.9% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.39%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 8 · Related 9
DLA-4019-1OPENSUSE-SU-2025:15361-1SUSE-SU-2025:03205-1SUSE-SU-2025:03271-1SUSE-SU-2025:03271-2SUSE-SU-2026:0872-1

Timeline

  1. 27-11-2023
    PublishedVulnerability first disclosed.
  2. 03-11-2025
    Last modifiedVulnerability information updated.

Description

A use-after-free vulnerability was discovered in BusyBox v.1.36.1 via a crafted awk pattern in the awk.c copyvar function.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.39%

Chance of exploitation in the next 30 days

Percentile

32%

Versus all other CVEs

30-day change

0.00 pp

From 0.40% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.39%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (bugs.busybox.net)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Alpine1 product
  • busybox< 1.35.0-r31 | < 1.36.1-r7 | < 1.36.1-r19 | < 1.36.1-r29 | < 1.36.1-r30
Busybox1 product
Chainguard1 product
  • busyboxAll versions (No fix recorded)
Debian1 product
  • busybox< 1:1.35.0-4+deb12u1 | < 1:1.37.0-1
Ubuntu1 product
  • busybox< 1:1.36.1-6ubuntu3.1
Wolfi1 product
  • busyboxAll versions (No fix recorded)

6 vendors · 6 products

References

10 links