CVE-2026-3497
CVE-2026-3497
This page contains facts from public vulnerability sources. Check the original advisory before updating.
This page shows selected source facts. See the linked advisories for the complete description and affected versions.
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.
CVSS 2.7 · Low · EPSS 1.3% · Fix available
- Published
- Updated
Affected products and versions
openssh
- Versions
- ≥ 1:10.0p1-5ubuntu5, < 1:10.0p1-5ubuntu5.1: Affected (dpkg)
- ≥ 1:9.6p1-3ubuntu13, < 1:9.6p1-3ubuntu13.15: Affected (dpkg)
- ≥ 1:8.9p1-3, < 1:8.9p1-3ubuntu0.14: Affected (dpkg)
Update to 1:10.0p1-5ubuntu5.1; Update to 1:9.6p1-3ubuntu13.15
openssh Debian:12
- Versions
- 1:9.2p1-2
- 1:9.2p1-2+deb12u1
- 1:9.2p1-2+deb12u2
- 1:9.2p1-2+deb12u3
- 1:9.2p1-2+deb12u4
- 1:9.2p1-2+deb12u5
- 1:9.2p1-2+deb12u6
- 1:9.2p1-2+deb12u7
- 1:9.2p1-2+deb12u8
- Affected ranges
- ECOSYSTEM: < 1:9.2p1-2+deb12u9
Update to 1:9.2p1-2+deb12u9
openssh Debian:13
- Versions
- 1:10.0p1-7
- 1:10.0p1-7+deb13u1
- Affected ranges
- ECOSYSTEM: < 1:10.0p1-7+deb13u2
Update to 1:10.0p1-7+deb13u2
openssh Debian:14
- Versions
- 1:10.0p1-7
- 1:10.0p1-8
- 1:10.1p1-1
- 1:10.1p1-2
- 1:10.2p1-1
- 1:10.2p1-2
- 1:10.2p1-2~bpo13+1
- 1:10.2p1-3
- 1:10.2p1-4
- 1:10.2p1-5
- 1:10.2p1-6~bpo13+1
- Affected ranges
- ECOSYSTEM: < 1:10.2p1-6
Update to 1:10.2p1-6
openssh Ubuntu:Pro:FIPS-updates:16.04:LTS
- Versions
- 1:7.2p2-4ubuntu2.fips.2.2.3
- 1:7.2p2-4ubuntu2.fips.2.4.1
- 1:7.2p2-4ubuntu2.fips.2.4.2
- 1:7.2p2-4ubuntu2.fips.2.8.1
- 1:7.2p2-4ubuntu2.fips.2.10.1
- 1:7.2p2-4ubuntu2.fips.2.10.2
- 1:7.2p2-4ubuntu2.fips.2.10.3
- 1:7.2p2-4ubuntu2.fips.2.10.4
- 1:7.2p2-4ubuntu2.fips.2.10.5
- 1:7.2p2-4ubuntu2.fips.2.10.6
- 1:7.2p2-4ubuntu2.fips.2.10.7
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
openssh Ubuntu:Pro:FIPS:16.04:LTS
- Versions
- 1:7.2p2-4ubuntu2.fips.2.2
- 1:7.2p2-4ubuntu2.fips.2.2.1
- 1:7.2p2-4ubuntu2.fips.2.10.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
openssh-ssh1 Ubuntu:18.04:LTS
- Versions
- 1:7.5p1-8
- 1:7.5p1-9
- 1:7.5p1-9build1
- 1:7.5p1-10
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
openssh Ubuntu:Pro:FIPS-updates:18.04:LTS
- Versions
- 1:7.9p1-10~ubuntu18.04.fips.0.1
- 1:7.9p1-10~ubuntu18.04.fips.0.2
- 1:7.9p1-10~ubuntu18.04.fips.0.3
- 1:7.9p1-10~ubuntu18.04.fips.0.4
- 1:7.9p1-10~ubuntu18.04.fips.0.5
- 1:7.9p1-10~ubuntu18.04.fips.0.6
- 1:7.9p1-10~ubuntu18.04.fips.0.7
- 1:7.9p1-10~ubuntu18.04.fips.0.8
- 1:7.9p1-10~ubuntu18.04.fips.0.9
- 1:7.9p1-10~ubuntu18.04.fips.0.10
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
openssh Ubuntu:Pro:FIPS:18.04:LTS
- Versions
- 1:7.9p1-10~ubuntu18.04.fips.0.1
- 1:7.9p1-10~ubuntu18.04.fips.0.2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
openssh Ubuntu:Pro:20.04:LTS
- Versions
- 1:8.0p1-6build1
- 1:8.1p1-1
- 1:8.1p1-5
- 1:8.2p1-4
- 1:8.2p1-4ubuntu0.1
- 1:8.2p1-4ubuntu0.2
- 1:8.2p1-4ubuntu0.3
- 1:8.2p1-4ubuntu0.4
- 1:8.2p1-4ubuntu0.5
- 1:8.2p1-4ubuntu0.7
- 1:8.2p1-4ubuntu0.8
- 1:8.2p1-4ubuntu0.9
- 1:8.2p1-4ubuntu0.10
- 1:8.2p1-4ubuntu0.11
- 1:8.2p1-4ubuntu0.12
- 1:8.2p1-4ubuntu0.13
- Affected ranges
- ECOSYSTEM: < 1:8.2p1-4ubuntu0.13+esm1
Update to 1:8.2p1-4ubuntu0.13+esm1
openssh-ssh1 Ubuntu:20.04:LTS
- Versions
- 1:7.5p1-11build1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
openssh Ubuntu:Pro:FIPS-updates:20.04:LTS
- Versions
- 1:8.2p1-4ubuntu0.fips.0.2.1
- 1:8.2p1-4ubuntu0.fips.0.4.0
- 1:8.2p1-4ubuntu0.fips.0.5.0
- 1:8.2p1-4ubuntu0.fips.0.7
- 1:8.2p1-4ubuntu0.fips.0.8
- 1:8.2p1-4ubuntu0.fips.0.9
- 1:8.2p1-4ubuntu0.fips.0.10
- 1:8.2p1-4ubuntu0.fips.0.11
- 1:8.2p1-4ubuntu0.fips.0.12
- 1:8.2p1-4ubuntu0.fips.0.13
- Affected ranges
- ECOSYSTEM: < 1:8.2p1-4ubuntu0.fips.0.13.1
Update to 1:8.2p1-4ubuntu0.fips.0.13.1
openssh Ubuntu:Pro:FIPS:20.04:LTS
- Versions
- 1:8.2p1-4ubuntu0.fips.0.2.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
openssh Ubuntu:22.04:LTS
- Versions
- 1:8.4p1-6ubuntu2
- 1:8.7p1-2
- 1:8.7p1-2build1
- 1:8.7p1-4
- 1:8.8p1-1
- 1:8.9p1-3
- 1:8.9p1-3ubuntu0.1
- 1:8.9p1-3ubuntu0.3
- 1:8.9p1-3ubuntu0.4
- 1:8.9p1-3ubuntu0.5
- 1:8.9p1-3ubuntu0.6
- 1:8.9p1-3ubuntu0.7
- 1:8.9p1-3ubuntu0.10
- 1:8.9p1-3ubuntu0.11
- 1:8.9p1-3ubuntu0.13
- Affected ranges
- ECOSYSTEM: < 1:8.9p1-3ubuntu0.14
Update to 1:8.9p1-3ubuntu0.14
openssh-ssh1 Ubuntu:22.04:LTS
- Versions
- 1:7.5p1-12
- 1:7.5p1-12build1
- 1:7.5p1-13
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
openssh Ubuntu:Pro:FIPS-preview:22.04:LTS
- Versions
- 1:8.9p1-3ubuntu0.4+Fips1
- 1:8.9p1-3ubuntu0.4+Fips3
- 1:8.9p1-3ubuntu1.fips.0~ppa3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
openssh Ubuntu:Pro:FIPS-updates:22.04:LTS
- Versions
- 1:8.9p1-3ubuntu0.4+Fips1
- 1:8.9p1-3ubuntu0.4+Fips3
- 1:8.9p1-3ubuntu0.6+Fips1
- 1:8.9p1-3ubuntu0.7+Fips1
- 1:8.9p1-3ubuntu0.10+Fips1
- 1:8.9p1-3ubuntu0.11+Fips1
- 1:8.9p1-3ubuntu0.13+Fips1
- Affected ranges
- ECOSYSTEM: < 1:8.9p1-3ubuntu0.14+Fips1
Update to 1:8.9p1-3ubuntu0.14+Fips1
openssh Ubuntu:24.04:LTS
- Versions
- 1:9.3p1-1ubuntu3
- 1:9.4p1-1ubuntu1
- 1:9.6p1-3ubuntu1
- 1:9.6p1-3ubuntu2
- 1:9.6p1-3ubuntu11
- 1:9.6p1-3ubuntu12
- 1:9.6p1-3ubuntu13
- 1:9.6p1-3ubuntu13.3
- 1:9.6p1-3ubuntu13.4
- 1:9.6p1-3ubuntu13.5
- 1:9.6p1-3ubuntu13.7
- 1:9.6p1-3ubuntu13.8
- 1:9.6p1-3ubuntu13.9
- 1:9.6p1-3ubuntu13.11
- 1:9.6p1-3ubuntu13.12
- 1:9.6p1-3ubuntu13.13
- 1:9.6p1-3ubuntu13.14
- Affected ranges
- ECOSYSTEM: < 1:9.6p1-3ubuntu13.15
Update to 1:9.6p1-3ubuntu13.15
openssh-ssh1 Ubuntu:24.04:LTS
- Versions
- 1:7.5p1-14
- 1:7.5p1-15
- 1:7.5p1-15build1
- 1:7.5p1-16
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
openssh Ubuntu:Pro:FIPS-updates:24.04:LTS
- Versions
- 1:9.6p1-3ubuntu13.7+Fips1
- 1:9.6p1-3ubuntu13.12+Fips1
- 1:9.6p1-3ubuntu13.13+Fips1
- 1:9.6p1-3ubuntu13.14+Fips1
- Affected ranges
- ECOSYSTEM: < 1:9.6p1-3ubuntu13.15+Fips1
Update to 1:9.6p1-3ubuntu13.15+Fips1
openssh Ubuntu:25.10
- Versions
- 1:9.9p1-3ubuntu3
- 1:9.9p1-3ubuntu3.1
- 1:10.0p1-5ubuntu2
- 1:10.0p1-5ubuntu3
- 1:10.0p1-5ubuntu4
- 1:10.0p1-5ubuntu5
- Affected ranges
- ECOSYSTEM: < 1:10.0p1-5ubuntu5.1
Update to 1:10.0p1-5ubuntu5.1
openssh-ssh1 Ubuntu:25.10
- Versions
- 1:7.5p1-17
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
openssh-ssh1 Ubuntu:26.10
- Versions
- 1:7.5p1-18
- 1:7.5p1-18ubuntu1
- 1:7.5p1-18ubuntu2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
openssh-ssh1 Ubuntu:26.04:LTS
- Versions
- 1:7.5p1-17
- 1:7.5p1-18
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
Original sources
- 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
- https://access.redhat.com/security/cve/CVE-2026-3497
- https://bugzilla.redhat.com/show_bug.cgi?id=2447085
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3497.json
- https://access.redhat.com/errata/RHSA-2026:21695
- https://access.redhat.com/errata/RHSA-2026:13812
- https://access.redhat.com/errata/RHSA-2026:21690
- https://access.redhat.com/errata/RHSA-2026:15087
- https://access.redhat.com/errata/RHSA-2026:14773
- https://access.redhat.com/errata/RHSA-2026:20087
- https://access.redhat.com/errata/RHSA-2026:17596
- https://access.redhat.com/errata/RHSA-2026:12071
- https://access.redhat.com/errata/RHSA-2026:20040
- https://access.redhat.com/errata/RHSA-2026:7107
- https://nvd.nist.gov/vuln/detail/CVE-2026-3497