High severity7.5NVD Advisory· Published Mar 12, 2026· Updated Jun 2, 2026
CVE-2026-3497
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
51cpe:2.3:a:canonical:ubuntu_linux:25.10:*:*:*:*:*:*:*+ 3 more
- cpe:2.3:a:canonical:ubuntu_linux:25.10:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:22.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:24.04:*:*:*:lts:*:*:*
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
- osv-coords42 versionspkg:rpm/almalinux/opensshpkg:rpm/almalinux/openssh-askpasspkg:rpm/almalinux/openssh-cavspkg:rpm/almalinux/openssh-clientspkg:rpm/almalinux/openssh-keycatpkg:rpm/almalinux/openssh-keysignpkg:rpm/almalinux/openssh-ldappkg:rpm/almalinux/openssh-serverpkg:rpm/almalinux/pam_ssh_agent_authpkg:rpm/opensuse/openssh&distro=openSUSE%20Tumbleweedpkg:rpm/suse/openssh8.4&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5-LTSSpkg:rpm/suse/openssh8.4&distro=SUSE%20Linux%20Enterprise%20Server%20LTSS%20Extended%20Security%2012%20SP5pkg:rpm/suse/openssh-askpass-gnome&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-ESPOSpkg:rpm/suse/openssh-askpass-gnome&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-LTSSpkg:rpm/suse/openssh-askpass-gnome&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-ESPOSpkg:rpm/suse/openssh-askpass-gnome&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-LTSSpkg:rpm/suse/openssh-askpass-gnome&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP7pkg:rpm/suse/openssh-askpass-gnome&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5-LTSSpkg:rpm/suse/openssh-askpass-gnome&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP4-LTSSpkg:rpm/suse/openssh-askpass-gnome&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP5-LTSSpkg:rpm/suse/openssh-askpass-gnome&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP6-LTSSpkg:rpm/suse/openssh-askpass-gnome&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP4pkg:rpm/suse/openssh-askpass-gnome&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP5pkg:rpm/suse/openssh-askpass-gnome&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP6pkg:rpm/suse/openssh-askpass-gnome&distro=SUSE%20Linux%20Enterprise%20Server%20LTSS%20Extended%20Security%2012%20SP5pkg:rpm/suse/openssh&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-ESPOSpkg:rpm/suse/openssh&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-LTSSpkg:rpm/suse/openssh&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-ESPOSpkg:rpm/suse/openssh&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-LTSSpkg:rpm/suse/openssh&distro=SUSE%20Linux%20Enterprise%20Micro%205.3pkg:rpm/suse/openssh&distro=SUSE%20Linux%20Enterprise%20Micro%205.4pkg:rpm/suse/openssh&distro=SUSE%20Linux%20Enterprise%20Micro%205.5pkg:rpm/suse/openssh&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7pkg:rpm/suse/openssh&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5-LTSSpkg:rpm/suse/openssh&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP4-LTSSpkg:rpm/suse/openssh&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP5-LTSSpkg:rpm/suse/openssh&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP6-LTSSpkg:rpm/suse/openssh&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP4pkg:rpm/suse/openssh&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP5pkg:rpm/suse/openssh&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP6pkg:rpm/suse/openssh&distro=SUSE%20Linux%20Enterprise%20Server%20LTSS%20Extended%20Security%2012%20SP5pkg:rpm/suse/openssh&distro=SUSE%20Linux%20Micro%206.1
< 8.0p1-28.el8_10+ 41 more
- (no CPE)range: < 8.0p1-28.el8_10
- (no CPE)range: < 8.0p1-28.el8_10
- (no CPE)range: < 8.0p1-28.el8_10
- (no CPE)range: < 8.0p1-28.el8_10
- (no CPE)range: < 8.0p1-28.el8_10
- (no CPE)range: < 9.9p1-13.el10_1.alma.1
- (no CPE)range: < 8.0p1-28.el8_10
- (no CPE)range: < 8.0p1-28.el8_10
- (no CPE)range: < 0.10.3-7.28.el8_10
- (no CPE)range: < 10.3p1-6.1
- (no CPE)range: < 8.4p1-8.24.1
- (no CPE)range: < 8.4p1-8.24.1
- (no CPE)range: < 8.4p1-150300.3.65.1
- (no CPE)range: < 8.4p1-150300.3.65.1
- (no CPE)range: < 8.4p1-150300.3.65.1
- (no CPE)range: < 8.4p1-150300.3.65.1
- (no CPE)range: < 9.6p1-150600.6.42.1
- (no CPE)range: < 7.2p2-81.40.1
- (no CPE)range: < 8.4p1-150300.3.65.1
- (no CPE)range: < 8.4p1-150300.3.65.1
- (no CPE)range: < 9.6p1-150600.6.42.1
- (no CPE)range: < 8.4p1-150300.3.65.1
- (no CPE)range: < 8.4p1-150300.3.65.1
- (no CPE)range: < 9.6p1-150600.6.42.1
- (no CPE)range: < 7.2p2-81.40.1
- (no CPE)range: < 8.4p1-150300.3.65.1
- (no CPE)range: < 8.4p1-150300.3.65.1
- (no CPE)range: < 8.4p1-150300.3.65.1
- (no CPE)range: < 8.4p1-150300.3.65.1
- (no CPE)range: < 8.4p1-150300.3.65.1
- (no CPE)range: < 8.4p1-150300.3.65.1
- (no CPE)range: < 8.4p1-150300.3.65.1
- (no CPE)range: < 9.6p1-150600.6.42.1
- (no CPE)range: < 7.2p2-81.40.1
- (no CPE)range: < 8.4p1-150300.3.65.1
- (no CPE)range: < 8.4p1-150300.3.65.1
- (no CPE)range: < 9.6p1-150600.6.42.1
- (no CPE)range: < 8.4p1-150300.3.65.1
- (no CPE)range: < 8.4p1-150300.3.65.1
- (no CPE)range: < 9.6p1-150600.6.42.1
- (no CPE)range: < 7.2p2-81.40.1
- (no CPE)range: < 9.6p1-slfo.1.1_6.1
Patches
Vulnerability mechanics
References
10- www.openwall.com/lists/oss-security/2026/03/12/3nvdMailing ListThird Party Advisory
- www.openwall.com/lists/oss-security/2026/03/14/3nvdMailing ListThird Party Advisory
- www.openwall.com/lists/oss-security/2026/03/14/4nvdMailing ListThird Party Advisory
- www.openwall.com/lists/oss-security/2026/03/18/2nvdMailing ListThird Party Advisory
- www.openwall.com/lists/oss-security/2026/03/18/4nvdMailing ListThird Party Advisory
- www.openwall.com/lists/oss-security/2026/03/18/5nvdMailing ListThird Party Advisory
- www.openwall.com/lists/oss-security/2026/03/18/7nvdMailing ListThird Party Advisory
- lists.debian.org/debian-lts-announce/2026/04/msg00014.htmlnvdMailing ListThird Party Advisory
- ubuntu.com/security/CVE-2026-3497nvdThird Party Advisory
- www.openwall.com/lists/oss-security/2026/03/12/3nvdMailing ListThird Party Advisory
News mentions
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