PT-2026-57151 · Bitwizard · Mtr

Marcin Wyczechowski + 1 · Published 2026-07-10 · Updated 2026-07-10 · CVE-2026-14461

NVD

CVSS v4.0

5.1

Medium

Base vector

AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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.

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2026-14461

Affected Products

Mtr

References · 3

• https://github.com/traviscross/mtr/commit/48e1794414d338ce47abc0f27c25ade8788af9c3 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-14461 · Security Note
• https://cert.pl/en/posts/2026/07/CVE-2026-14461 · Note