Information Exposure Affecting libslirp package, versions *


Severity

Recommended
0.0
low
0
10

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Threat Intelligence

EPSS
0.24% (15th percentile)

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  • Snyk IDSNYK-DEBIAN12-LIBSLIRP-21483472
  • published23 Oct 2026
  • disclosed22 Oct 2026

Introduced: 22 Oct 2026

NewCVE-2026-115449  (opens in a new tab)
CWE-200  (opens in a new tab)

How to fix?

There is no fixed version for Debian:12 libslirp.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libslirp package and not the libslirp package as distributed by Debian. See How to fix? for Debian:12 relevant fixed versions and status.

A flaw was found in libslirp. When handling ICMP echo requests, the reply length is not updated to match the actual data received from the host. Under specific conditions where the normal ICMP socket is unavailable, this length mismatch causes the host's real IP address to be leaked to the guest in the echo reply, breaking the NAT isolation that user-mode networking is expected to provide.

CVSS Base Scores

version 3.1