CVE-2026-3497
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
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-3497
openssh
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://launchpad.net/ubuntu/+source/openssh",
"vendor": "Ubuntu",
"product": "openssh",
"versions": [
{
"status": "affected",
"version": "1:10.0p1-5ubuntu5",
"lessThan": "1:10.0p1-5ubuntu5.1",
"versionType": "dpkg"
},
{
"status": "affected",
"version": "1:9.6p1-3ubuntu13",
"lessThan": "1:9.6p1-3ubuntu13.15",
"versionType": "dpkg"
},
{
"status": "affected",
"version": "1:8.9p1-3",
"lessThan": "1:8.9p1-3ubuntu0.14",
"versionType": "dpkg"
}
],
"packageName": "openssh",
"collectionURL": "https://launchpad.net/ubuntu/",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-3497
Source reference:
/cveMetadata/cveId
Publisher severity
low
Source reference: /containers/cna/metrics
- Event
- #28330 · Revision 1
- Added to Heist Feed
- Publisher date