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CVE-2026-3497

7.5 · HIGH

Vulnerability in the OpenSSH GSSAPI delta included in various Linux distributions.

Published Mar 12, 2026CWE-908EPSS 1.30%

Overview

CVE-2026-3497 is a high-severity vulnerability. It was published on March 12, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refubuntu.com/security/CVE-2026-3497Refwww.openwall.com/lists/oss-security/2026/03/12/3Refwww.openwall.com/lists/oss-security/2026/03/12/3Refwww.openwall.com/lists/oss-security/2026/03/14/3Refwww.openwall.com/lists/oss-security/2026/03/14/4Refwww.openwall.com/lists/oss-security/2026/03/18/2Refwww.openwall.com/lists/oss-security/2026/03/18/4Refwww.openwall.com/lists/oss-security/2026/03/18/5Refwww.openwall.com/lists/oss-security/2026/03/18/7Reflists.debian.org/debian-lts-announce/2026/04/msg00014.html

How CyberStrike helps

Frequently asked questions

What is CVE-2026-3497?

CVE-2026-3497 is a high-severity vulnerability. It was published on March 12, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-3497?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-3497?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-3497?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-3497 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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