CVE-2026-54579

mport mirror-selection ping accepts insufficiently validated ICMP replies

State: Published
Severity: 2.3 Low
Published: Sep 17, 2026
Updated: Sep 24, 2026
Reserved: Jun 15, 2026

Description

mport is the MidnightBSD Package Manager. Prior to 2.7.8, ping() in libmport/ping.c accepted ICMP replies without validating icmp_id or icmp_seq and parsed the reply using a fixed IP-header offset instead of ip_hl. A network attacker able to inject or spoof visible ICMP replies could influence mirror latency selection, while a malformed packet carrying IP options could shift the ICMP header and trigger an out-of-bounds read. This issue is fixed in version 2.7.8.

Scores

CVSS	Score	Vector	Source
4.0	2.3 Low	CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-125 Out-of-bounds Read
CWE-345 Insufficient Verification of Data Authenticity

Affected Products

Product	Versions
mportMidnightBSD	< 2.7.8Affected

References

https://github.com/MidnightBSD/mport/security/advisories/GHSA-qc2f-2j7j-m3r7

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