Use After Free Affecting slirp4netns package, versions <1.0.1-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
2.36% (83rd percentile)

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  • Snyk IDSNYK-DEBIAN14-SLIRP4NETNS-11768205
  • published10 Aug 2025
  • disclosed22 Apr 2020

Introduced: 22 Apr 2020

CVE-2020-1983  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Debian:14 slirp4netns to version 1.0.1-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream slirp4netns package and not the slirp4netns package as distributed by Debian. See How to fix? for Debian:14 relevant fixed versions and status.

A use after free vulnerability in ip_reass() in ip_input.c of libslirp 4.2.0 and prior releases allows crafted packets to cause a denial of service.

CVSS Base Scores

version 3.1