CVE-2026-14461: Out-of-bound read in mtr
mtr is vulnerable to Out-of-bound read vulnerability in ipinfolookup() 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. ipinfolookup() function uses the length of the response as the end-of-message boundary for dnexpand() function. The result is a reliable crash.
This issue exists in the mtr through version 0.96 and it was fixed in commit 48e1794414d338ce47abc0f27c25ade8788af9c3.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 0.95-4 - Upgrade
Upgrade
mtrto a version that resolves this vulnerability.Patch 48e1794414d338ce47abc0f27c25ade8788af9c3
Event History
Frequently Asked Questions
What is the severity of CVE-2026-14461?
The severity of CVE-2026-14461 is classified as medium with a CVSS score of 5.1.
What type of vulnerability is CVE-2026-14461?
CVE-2026-14461 is an out-of-bounds read vulnerability in the ipinfo_lookup() function of mtr.
How can an attacker exploit CVE-2026-14461?
An attacker can exploit CVE-2026-14461 by influencing the TXT response for AS lookups and returning a DNS response larger than 512 bytes with a crafted compression pointer.
Which software is affected by CVE-2026-14461?
CVE-2026-14461 affects the mtr software package.
Is there a fix available for CVE-2026-14461?
Yes, users should apply the latest patches for mtr to mitigate CVE-2026-14461.