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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| BitWizard | mtr | ≤ 0.96 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | mtr | 0.96-2 | — |
| Debian 13 | mtr | No fix yet | — |
| Debian 12 | mtr | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | mtr | No fix yet | — |
| Ubuntu 26.04 LTS | mtr | No fix yet | — |
| Ubuntu 24.04 LTS | mtr | No fix yet | — |
| Ubuntu 22.04 LTS | mtr | No fix yet | — |
| Ubuntu 20.04 LTS | mtr | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | mtr | No fix yet | — |
| Ubuntu 16.04 LTS | mtr | No fix yet | — |
| Ubuntu 14.04 LTS | mtr | No fix yet | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | mtr | 0.95-4 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
GitHub 1 repository
-
sifatnotes/Learn-SecByte-CTF-Labs-Beelzebub-SQLMap-Auth-CVE-2026-14461-Web-to-Root ★ 0 · Oct 3, 2026
Hands-on Learn SecByte CTF labs covering Beelzebub preparation, VM and network clues, Base64, CVE-2026-14461, admin panels, authentication, credential leaks, kernel security, reused keys, SQLMap, and…
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.