{ "document": { "aggregate_severity": { "text": "Important" }, "category": "csaf_security_advisory", "csaf_version": "2.0", "distribution": { "text": "TuxCare License Agreement", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.", "title": "Terms of Use" }, { "category": "details", "text": "* SECURITY UPDATE: pre-auth crash via GSSAPI key exchange\n - debian/patches/CVE-2026-3497.patch: replace sshpkt_disconnect() with\n ssh_packet_disconnect() and initialize gss_buffer_desc variables in\n kexgssc.c, kexgsss.c.\n - CVE-2026-3497", "title": "Details" } ], "publisher": { "category": "vendor", "contact_details": "https://tuxcare.com/contact/", "name": "TuxCare", "namespace": "https://tuxcare.com/" }, "references": [ { "category": "self", "summary": "https://cve.tuxcare.com/els/releases/CLSA-2026:1774366569", "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1774366569" }, { "category": "self", "summary": "Canonical URL", "url": "https://security.tuxcare.com/csaf/v2/els_os/ubuntu20.04els/advisories/2026/clsa-2026_1774366569.json" } ], "tracking": { "current_release_date": "2026-03-24T15:36:48Z", "generator": { "date": "2026-03-24T15:36:48Z", "engine": { "name": "pyCSAF" } }, "id": "CLSA-2026:1774366569", "initial_release_date": "2026-03-24T15:36:48Z", "revision_history": [ { "date": "2026-03-24T15:36:48Z", "number": "1", "summary": "Initial version" } ], "status": "final", "version": "1" }, "title": "Fix CVE(s): CVE-2026-3497" }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Ubuntu 20.04", "product": { "name": "Ubuntu 20.04", "product_id": "Ubuntu-20", "product_identification_helper": { "cpe": "cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*" } } } ], "category": "product_family", "name": "Ubuntu" } ], "category": "vendor", "name": "Canonical Ltd." }, { "branches": [ { "branches": [ { "category": "product_version", "name": "ssh-1:8.2p1-4ubuntu0.13+tuxcare.els1.all", "product": { "name": "ssh-1:8.2p1-4ubuntu0.13+tuxcare.els1.all", "product_id": "ssh-1:8.2p1-4ubuntu0.13+tuxcare.els1.all", "product_identification_helper": { "purl": "pkg:deb/tuxcare/ssh@8.2p1-4ubuntu0.13%2Btuxcare.els1?arch=all" } } } ], "category": "architecture", "name": "all" }, { "branches": [ { "category": "product_version", "name": "openssh-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "product": { "name": "openssh-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "product_id": "openssh-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "product_identification_helper": { "purl": "pkg:deb/tuxcare/openssh-server@8.2p1-4ubuntu0.13%2Btuxcare.els1?arch=amd64" } } }, { "category": "product_version", "name": "ssh-askpass-gnome-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "product": { "name": "ssh-askpass-gnome-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "product_id": "ssh-askpass-gnome-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "product_identification_helper": { "purl": "pkg:deb/tuxcare/ssh-askpass-gnome@8.2p1-4ubuntu0.13%2Btuxcare.els1?arch=amd64" } } }, { "category": "product_version", "name": "openssh-tests-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "product": { "name": "openssh-tests-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "product_id": "openssh-tests-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "product_identification_helper": { "purl": "pkg:deb/tuxcare/openssh-tests@8.2p1-4ubuntu0.13%2Btuxcare.els1?arch=amd64" } } }, { "category": "product_version", "name": "openssh-sftp-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "product": { "name": "openssh-sftp-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "product_id": "openssh-sftp-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "product_identification_helper": { "purl": "pkg:deb/tuxcare/openssh-sftp-server@8.2p1-4ubuntu0.13%2Btuxcare.els1?arch=amd64" } } }, { "category": "product_version", "name": "openssh-client-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "product": { "name": "openssh-client-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "product_id": "openssh-client-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "product_identification_helper": { "purl": "pkg:deb/tuxcare/openssh-client@8.2p1-4ubuntu0.13%2Btuxcare.els1?arch=amd64" } } } ], "category": "architecture", "name": "amd64" } ], "category": "vendor", "name": "TuxCare" } ], "relationships": [ { "category": "default_component_of", "full_product_name": { "name": "ssh-1:8.2p1-4ubuntu0.13+tuxcare.els1.all as a component of Ubuntu 20.04", "product_id": "Ubuntu-20:ssh-1:8.2p1-4ubuntu0.13+tuxcare.els1.all" }, "product_reference": "ssh-1:8.2p1-4ubuntu0.13+tuxcare.els1.all", "relates_to_product_reference": "Ubuntu-20" }, { "category": "default_component_of", "full_product_name": { "name": "openssh-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64 as a component of Ubuntu 20.04", "product_id": "Ubuntu-20:openssh-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64" }, "product_reference": "openssh-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "relates_to_product_reference": "Ubuntu-20" }, { "category": "default_component_of", "full_product_name": { "name": "ssh-askpass-gnome-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64 as a component of Ubuntu 20.04", "product_id": "Ubuntu-20:ssh-askpass-gnome-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64" }, "product_reference": "ssh-askpass-gnome-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "relates_to_product_reference": "Ubuntu-20" }, { "category": "default_component_of", "full_product_name": { "name": "openssh-tests-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64 as a component of Ubuntu 20.04", "product_id": "Ubuntu-20:openssh-tests-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64" }, "product_reference": "openssh-tests-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "relates_to_product_reference": "Ubuntu-20" }, { "category": "default_component_of", "full_product_name": { "name": "openssh-sftp-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64 as a component of Ubuntu 20.04", "product_id": "Ubuntu-20:openssh-sftp-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64" }, "product_reference": "openssh-sftp-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "relates_to_product_reference": "Ubuntu-20" }, { "category": "default_component_of", "full_product_name": { "name": "openssh-client-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64 as a component of Ubuntu 20.04", "product_id": "Ubuntu-20:openssh-client-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64" }, "product_reference": "openssh-client-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "relates_to_product_reference": "Ubuntu-20" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-3497", "cwe": { "id": "CWE-824", "name": "Access of Uninitialized Pointer" }, "notes": [ { "category": "description", "text": "A flaw was found in the OpenSSH GSSAPI (Generic Security Service Application Program Interface) delta patches, as included in various Linux distributions. A remote attacker could exploit this by sending an unexpected GSSAPI message type during the key exchange process. This occurs because the `sshpkt_disconnect()` function, when called on an error, does not properly terminate the process, leading to the continued execution of the program with uninitialized connection variables. Accessing these uninitialized variables can lead to undefined behavior, potentially resulting in information disclosure or a denial of service.", "title": "Vulnerability description" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "fixed": [ "Ubuntu-20:openssh-client-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "Ubuntu-20:openssh-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "Ubuntu-20:openssh-sftp-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "Ubuntu-20:openssh-tests-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "Ubuntu-20:ssh-1:8.2p1-4ubuntu0.13+tuxcare.els1.all", "Ubuntu-20:ssh-askpass-gnome-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2026-3497" } ], "release_date": "2026-03-12T18:27:00Z", "remediations": [ { "category": "vendor_fix", "date": "2026-03-24T15:36:12.333022Z", "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els/releases/CLSA-2026:1774366569", "product_ids": [ "Ubuntu-20:openssh-client-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "Ubuntu-20:openssh-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "Ubuntu-20:openssh-sftp-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "Ubuntu-20:openssh-tests-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "Ubuntu-20:ssh-1:8.2p1-4ubuntu0.13+tuxcare.els1.all", "Ubuntu-20:ssh-askpass-gnome-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64" ], "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1774366569" } ], "scores": [ { "cvss_v3": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H", "version": "3.1" }, "products": [ "Ubuntu-20:openssh-client-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "Ubuntu-20:openssh-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "Ubuntu-20:openssh-sftp-server-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "Ubuntu-20:openssh-tests-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64", "Ubuntu-20:ssh-1:8.2p1-4ubuntu0.13+tuxcare.els1.all", "Ubuntu-20:ssh-askpass-gnome-1:8.2p1-4ubuntu0.13+tuxcare.els1.amd64" ] } ], "threats": [ { "category": "impact", "details": "Important" } ] } ] }