Vulnerability in the OpenSSH GSSAPI delta included in various Linux distributions. This vulnerability affects the GSSAPI patches added by various Linux distributions and does not affect the OpenSSH upstream project itself. The usage of sshpkt_disconnect() on an error, which does not terminate the process, allows an attacker to send an unexpected GSSAPI message type during the GSSAPI key exchange to the server, which will call the underlying function and continue the execution of the program without setting the related connection variables. As the variables are not initialized to NULL the code later accesses those uninitialized variables, accessing random memory, which could lead to undefined behavior. The recommended workaround is to use ssh_packet_disconnect() instead, which does terminate the process. The impact of the vulnerability depends heavily on the compiler flag hardening configuration.

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Fixes

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Workaround

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History

Thu, 12 Mar 2026 20:30:00 +0000

Type Values Removed Values Added
References

Thu, 12 Mar 2026 19:15:00 +0000

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Metrics ssvc

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


Thu, 12 Mar 2026 19:00:00 +0000

Type Values Removed Values Added
References

Thu, 12 Mar 2026 18:45:00 +0000

Type Values Removed Values Added
Description Vulnerability in the OpenSSH GSSAPI delta included in various Linux distributions. This vulnerability affects the GSSAPI patches added by various Linux distributions and does not affect the OpenSSH upstream project itself. The usage of sshpkt_disconnect() on an error, which does not terminate the process, allows an attacker to send an unexpected GSSAPI message type during the GSSAPI key exchange to the server, which will call the underlying function and continue the execution of the program without setting the related connection variables. As the variables are not initialized to NULL the code later accesses those uninitialized variables, accessing random memory, which could lead to undefined behavior. The recommended workaround is to use ssh_packet_disconnect() instead, which does terminate the process. The impact of the vulnerability depends heavily on the compiler flag hardening configuration.
Weaknesses CWE-908
References
Metrics cvssV4_0

{'score': 2.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: canonical

Published:

Updated: 2026-03-12T19:17:58.354Z

Reserved: 2026-03-03T19:33:05.664Z

Link: CVE-2026-3497

cve-icon Vulnrichment

Updated: 2026-03-12T19:17:58.354Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-03-12T19:16:19.910

Modified: 2026-03-12T21:07:53.427

Link: CVE-2026-3497

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses