This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page.
View CVE-2026-115449 →
Unrated
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...
DEBIAN-CVE-2026-115449
First seen on SecPulse
Affected packages
| Ecosystem | Package | Affected | Fixed |
|---|---|---|---|
| Debian:12 | libslirp |
All versions |
— |
| Debian:13 | libslirp |
All versions |
— |
| Debian:14 | libslirp |
All versions |
— |
Original description The description as published by the source.
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.
Source: OSV.dev (Open Source Vulnerabilities) OSV
References
- advisory security-tracker.debian.org