Home

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.

PUBLISHED Reserved 2026-07-02 | Published 2026-07-10 | Updated 2026-07-10 | Assigner CERT-PL




MEDIUM: 5.1CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Problem types

CWE-125 Out-of-bounds read

Product status

Default status
unaffected

Any version
affected

Credits

Michał Majchrowicz (AFINE Team) finder

Marcin Wyczechowski (AFINE Team) finder

References

cert.pl/en/posts/2026/07/CVE-2026-14461 third-party-advisory

github.com/...ommit/48e1794414d338ce47abc0f27c25ade8788af9c3 patch

cve.org (CVE-2026-14461)

nvd.nist.gov (CVE-2026-14461)

Download JSON