Detections
Analytics
Linux Distros Unpatched Vulnerability : CVE-2026-3497
medium Nessus Plugin ID 302159
Synopsis
The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.Description
The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.- 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. (CVE-2026-3497)
Note that Nessus relies on the presence of the package as reported by the vendor.
Solution
There is no known solution at this time.See Also
https://access.redhat.com/security/cve/cve-2026-3497
Plugin Details
Severity: Medium
ID: 302159
File Name: unpatched_CVE_2026_3497.nasl
Version: 1.2
Type: local
Agent: unix
Family: Misc.
Published: 3/13/2026
Updated: 3/13/2026
Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.6
CVSS v2
Risk Factor: Medium
Base Score: 6.4
Temporal Score: 5.4
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:P
CVSS Score Source: CVE-2026-3497
CVSS v3
Risk Factor: Critical
Base Score: 9.1
Temporal Score: 8.3
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Temporal Vector: CVSS:3.0/E:U/RL:U/RC:C
CVSS v4
Risk Factor: Medium
Base Score: 6.9
Threat Score: 2.7
Threat Vector: CVSS:4.0/E:U
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
Vulnerability Information
CPE: cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:redhat:enterprise_linux:openssh-cavs, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:centos:centos:openssh-ldap, cpe:/o:debian:debian_linux:12.0, p-cpe:/a:centos:centos:openssh-server, cpe:/o:canonical:ubuntu_linux:25.10, p-cpe:/a:centos:centos:openssh-clients, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:debian:debian_linux:openssh, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:redhat:enterprise_linux:openssh, cpe:/o:centos:centos:8, p-cpe:/a:centos:centos:openssh-keysign, p-cpe:/a:redhat:enterprise_linux:openssh-keycat, p-cpe:/a:redhat:enterprise_linux:pam_ssh_agent_auth, p-cpe:/a:canonical:ubuntu_linux:openssh-ssh1, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:10, cpe:/o:debian:debian_linux:13.0, p-cpe:/a:redhat:enterprise_linux:openssh-keysign, p-cpe:/a:redhat:enterprise_linux:openssh-askpass, p-cpe:/a:centos:centos:openssh-keycat, p-cpe:/a:centos:centos:openssh, p-cpe:/a:centos:centos:openssh-askpass, p-cpe:/a:redhat:enterprise_linux:openssh-clients, p-cpe:/a:redhat:enterprise_linux:openssh-server, p-cpe:/a:redhat:enterprise_linux:openssh-ldap, p-cpe:/a:centos:centos:pam_ssh_agent_auth, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:debian:debian_linux:14.0, p-cpe:/a:centos:centos:openssh-cavs, cpe:/o:debian:debian_linux:11.0
Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier
Exploit Ease: No known exploits are available
Vulnerability Publication Date: 3/12/2026
Reference Information
CVE: CVE-2026-3497