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.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-099537 advisory.

    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 theend-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     commit48e1794414d338ce47abc0f27c25ade8788af9c3.

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of CBL-Mariner Releases installed on the remote Azure Linux 3.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2026-14461 advisory.

  - 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. (CVE-2026-14461)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-14461)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
336246	Unity Linux 20.1070e Security Update: mtr (UTSA-2026-099537)	Nessus	Unity Linux Local Security Checks	Local	medium
326879	Azure Linux 3.0 Security Update: CBL-Mariner Releases (CVE-2026-14461)	Nessus	Azure Linux Local Security Checks	Local	medium
326534	Linux Distros Unpatched Vulnerability : CVE-2026-14461	Nessus	Misc.	Local	medium

Detections

Analytics

CVE-2026-14461

medium

Tenable Plugins

medium

medium

medium