CVE-2026-32746

Out-of-Bounds Write in GNU Inetutils Telnet Daemon

Published Mar 13, 2026 CVSS 3.1 · 9.8 Critical EPSS 45.3% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-4527-1 inetutils security update
Debian DSA Debian DSA DSA-6193-1 inetutils security update
Ubuntu USN Ubuntu USN USN-8387-1 Inetutils vulnerabilities
History
Type Values Removed Values Added
Title Out-of-Bounds Write in GNU Inetutils Telnet Daemon
Type Values Removed Values Added
Title Out-of-Bounds Write in telnetd's LINEMODE SLC Suboption Enables Remote Code Execution
Type Values Removed Values Added
Title Out-of-Bounds Write in telnetd's LINEMODE SLC Suboption Enables Remote Code Execution
Type Values Removed Values Added
Title Out-of-Bounds Write in GNU Inetutils Telnet Daemon via LINEMODE SLC
Type Values Removed Values Added
Title Out-of-Bounds Write in GNU Inetutils Telnet Daemon via LINEMODE SLC
Type Values Removed Values Added
Title Out-of-Bounds Write in GNU Inetutils telnetd LINEMODE SLC Handler
Type Values Removed Values Added
Title Out-of-Bounds Write in GNU Inetutils telnetd LINEMODE SLC Handler
Type Values Removed Values Added
References
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
References
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Gnu
Gnu inetutils
CPEs cpe:2.3:a:gnu:inetutils:*:*:*:*:*:*:*:*
Vendors & Products Gnu
Gnu inetutils
Type Values Removed Values Added
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.
Weaknesses CWE-120
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Mar 23, 2026, 1:13 PM
Reserved
Mar 13, 2026, 5:15 PM
Status
Analyzed
Published
Mar 13, 2026, 7:55 PM
Modified
Jun 17, 2026, 10:36 AM