Description
telnetd in GNU inetutils through 2.7 allows an out-of-bounds write in the LINEMODE SLC (Set Local Characters) suboption handler because add_slc does not check whether the buffer is full.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| GNU | inetutils | ≤ 2.7 | — |
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 | inetutils | 2:2.7-4 | — |
| Debian 13 | inetutils | 2:2.6-3+deb13u3 | — |
| Debian 12 | inetutils | 2:2.4-2+deb12u3 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | inetutils | 2:2.7-2ubuntu1.1 | USN-8387-1 |
| Ubuntu 25.10 | inetutils | 2:2.6-1ubuntu3.2 | USN-8387-1 |
| Ubuntu 24.04 LTS | inetutils | 2:2.5-3ubuntu4.2 | USN-8387-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 22.04 LTS | inetutils | 2:2.2-2ubuntu0.2+esm1 | USN-8387-1 |
| Ubuntu Pro 20.04 LTS | inetutils | 2:1.9.4-11ubuntu0.2+esm4 | USN-8387-1 |
| Ubuntu Pro 18.04 LTS | inetutils | 2:1.9.4-3ubuntu0.1+esm5 | USN-8387-1 |
| Ubuntu Pro 16.04 LTS | inetutils | 2:1.9.4-1ubuntu0.1~esm6 | USN-8387-1 |
| Ubuntu Pro 14.04 LTS | inetutils | 2:1.9.2-1ubuntu0.1~esm4 | USN-8387-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | krb5-appl | 1.0.3-3.12.1 | SUSE-SU-2026:0930-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | krb5-appl | 1.0.3-6.1 | openSUSE-SU-2026:10657-1 |
| openSUSE Leap 16.0 | krb5-appl | 1.0.3-bp160.2.1 | openSUSE-SU-2026:20374-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | inetutils-telnet | 2.8-r0 | — |
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.
Exploit-DB 1
- telnetd 2.7 - Buffer Overflow EDB-52556 · remote · May 7, 2026
GitHub 7 repositories
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jeffaf/cve-2026-32746 ★ 30 · Mar 18, 2026
CVE-2026-32746 - GNU InetUtils telnetd LINEMODE SLC Buffer Overflow PoC (pre-auth RCE, CVSS 9.8)
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watchtowrlabs/watchtowr-vs-telnetd-CVE-2026-32746 ★ 10 · Mar 19, 2026
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MonkeySeC-sys/Kangaroo ★ 2 · Aug 2, 2026
Kangaroo is a exploit built on CVE-2026-32746. i made this for security researchers, IT professionals, DevOps. so they can understand it better. DO NOT USE THIS FOR ILLEGAL USE, IF YOU DO... YOU MAY …
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kaleth4/CVE-2026-32746 ★ 0 · May 9, 2026
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chosenonehacks/CVE-2026-32746 ★ 0 · Mar 20, 2026
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danindiana/cve-2026-32746-mitigation ★ 0 · Mar 20, 2026
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duduLiu8787/CVE-2026-32746-Exploit ★ 0 · Mar 19, 2026
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 5
- USN-8387-1 inetutils vulnerabilities Ubuntu Security Notices (USN) · Jun 8, 2026
- WID-SEC-2026-0734 GNU InetUtils: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 8, 2026
- openSUSE-SU-2026:10657-1 krb5-appl-clients-1.0.3-6.1 on GA media SUSE / openSUSE Security Updates · Apr 30, 2026
- openSUSE-SU-2026:20374-1 Security update for krb5-appl SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0930-1 Security update for krb5-appl SUSE / openSUSE Security Updates · Mar 20, 2026