CVE-2026-3497
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Ubuntu Affected 3 releases
| Version | Status | Fixed in |
|---|---|---|
| 24.04 | Affected | — |
| 22.04 | Affected | — |
| 20.04 | Affected | — |
Debian Mixed 6 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 1:10.0p1-7+deb13u2 |
| sid | Fixed | 1:10.2p1-6 |
| forky | Fixed | 1:10.2p1-6 |
| bullseye | Fixed | 1:8.4p1-5+deb11u6 |
| bookworm | Fixed | 1:9.2p1-2+deb12u9 |
| 11.0 | Affected | — |
Red Hat Mixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| 10.0 | Affected | — |
| 9.0 | Affected | — |
| 9 | Fixed | — |
| 8.0 | Affected | — |
| 8 | Fixed | — |
AlmaLinux Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| 9 | Fixed | pam_ssh_agent_auth-0.10.4-5.48.el9_7.alma.1.aarch64.rpm |
Rocky Linux Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| 8 | Fixed | — |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| canonical | ubuntu_linux | 25.10 | |
| openbsd | openssh | - | |
References
- https://errata.rockylinux.org/RLSA-2026:6461
- https://access.redhat.com/errata/RHSA-2026:6462
- https://www.suse.com/security/cve/CVE-2026-3497.html
- https://security-tracker.debian.org/tracker/CVE-2026-3497
- https://access.redhat.com/errata/RHSA-2026:6461
- https://bugzilla.redhat.com/2447085
- https://errata.almalinux.org/8/ALSA-2026-6461.html
- https://errata.almalinux.org/9/ALSA-2026-6462.html
- https://ubuntu.com/security/CVE-2026-3497
- https://www.openwall.com/lists/oss-security/2026/03/12/3
- http://www.openwall.com/lists/oss-security/2026/03/12/3
- http://www.openwall.com/lists/oss-security/2026/03/14/3
- http://www.openwall.com/lists/oss-security/2026/03/14/4
- http://www.openwall.com/lists/oss-security/2026/03/18/2
- http://www.openwall.com/lists/oss-security/2026/03/18/4
- http://www.openwall.com/lists/oss-security/2026/03/18/5
- http://www.openwall.com/lists/oss-security/2026/03/18/7
- https://lists.debian.org/debian-lts-announce/2026/04/msg00014.html
CWEs
CWE-908
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.