CVE-2026-14461

Out-of-bound read in mtr

State: Published
Severity: 5.1 Medium
Published: Jul 10, 2026
Updated: Jul 10, 2026
Reserved: Jul 2, 2026

Description

mtr is vulnerable to Out-of-bound read vulnerability in ipinfo_lookup() function. An attacker who can influence the TXT response used for AS lookups can trigger this bug by returning a DNS response that is larger than 512 bytes and uses a crafted compression pointer in the answer NAME field. ipinfo_lookup() function uses the length of the response as the end-of-message boundary for dn_expand() function. The result is a reliable crash.

This issue exists in the mtr through version 0.96 and it was fixed in commit 48e1794414d338ce47abc0f27c25ade8788af9c3.

Scores

CVSS	Score	Vector	Source
4.0	5.1 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N	CERT-PL

Weaknesses

CWE-125 Out-of-bounds read

Affected Products

Product	Versions
mtrBitWizard	0.96 and earlierAffected

References

https://cert.pl/en/posts/2026/07/CVE-2026-14461third-party-advisory
https://github.com/traviscross/mtr/commit/48e1794414d338ce47abc0f27c25ade8788af9c3patch

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