{ "document": { "aggregate_severity": { "text": "Critical" }, "category": "csaf_vex", "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" } ], "publisher": { "category": "vendor", "contact_details": "https://tuxcare.com/contact/", "name": "TuxCare", "namespace": "https://tuxcare.com/" }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://security.tuxcare.com/csaf/v2/els_os/centos7els/vex/2026/cve-2026-55200-els_os-centos7els.json" } ], "tracking": { "current_release_date": "2026-07-15T12:48:25Z", "generator": { "date": "2026-07-15T12:48:25Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2026-55200-ELS_OS-CENTOS7ELS", "initial_release_date": "2026-06-17T20:17:00Z", "revision_history": [ { "date": "2026-06-17T20:17:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-06-27T12:27:57Z", "number": "2", "summary": "Official Publication" }, { "date": "2026-07-01T12:33:49Z", "number": "3", "summary": "Update document" }, { "date": "2026-07-09T15:48:33Z", "number": "4", "summary": "Update document" }, { "date": "2026-07-15T12:48:25Z", "number": "5", "summary": "Update document" } ], "status": "final", "version": "5" }, "title": "Security update on CVE-2026-55200" }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Community Enterprise Operating System 7", "product": { "name": "Community Enterprise Operating System 7", "product_id": "CentOS-7", "product_identification_helper": { "cpe": "cpe:2.3:o:centos:centos:7:*:*:*:*:*:*:*" } } } ], "category": "product_family", "name": "Community Enterprise Operating System" } ], "category": "vendor", "name": "Red Hat, Inc." }, { "branches": [ { "branches": [ { "category": "product_version", "name": "libssh2-0:1.8.0-4.el7_9.1.tuxcare.els1.i686", "product": { "name": "libssh2-0:1.8.0-4.el7_9.1.tuxcare.els1.i686", "product_id": "libssh2-0:1.8.0-4.el7_9.1.tuxcare.els1.i686", 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"libssh2-devel-0:1.8.0-4.el7_9.1.tuxcare.els2.i686", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/libssh2-devel@1.8.0-4.el7_9.1.tuxcare.els2?arch=i686" } } } ], "category": "architecture", "name": "i686" }, { "branches": [ { "category": "product_version", "name": "libssh2-0:1.8.0-4.el7_9.1.tuxcare.els1.x86_64", "product": { "name": "libssh2-0:1.8.0-4.el7_9.1.tuxcare.els1.x86_64", "product_id": "libssh2-0:1.8.0-4.el7_9.1.tuxcare.els1.x86_64", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/libssh2@1.8.0-4.el7_9.1.tuxcare.els1?arch=x86_64" } } }, { "category": "product_version", "name": "libssh2-devel-0:1.8.0-4.el7_9.1.tuxcare.els1.x86_64", "product": { "name": "libssh2-devel-0:1.8.0-4.el7_9.1.tuxcare.els1.x86_64", "product_id": "libssh2-devel-0:1.8.0-4.el7_9.1.tuxcare.els1.x86_64", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/libssh2-devel@1.8.0-4.el7_9.1.tuxcare.els1?arch=x86_64" } } }, { "category": "product_version", "name": "libssh2-0:1.8.0-4.el7_9.1.tuxcare.els2.x86_64", "product": { "name": "libssh2-0:1.8.0-4.el7_9.1.tuxcare.els2.x86_64", "product_id": "libssh2-0:1.8.0-4.el7_9.1.tuxcare.els2.x86_64", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/libssh2@1.8.0-4.el7_9.1.tuxcare.els2?arch=x86_64" } } }, { "category": "product_version", "name": "libssh2-devel-0:1.8.0-4.el7_9.1.tuxcare.els2.x86_64", "product": { "name": "libssh2-devel-0:1.8.0-4.el7_9.1.tuxcare.els2.x86_64", "product_id": "libssh2-devel-0:1.8.0-4.el7_9.1.tuxcare.els2.x86_64", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/libssh2-devel@1.8.0-4.el7_9.1.tuxcare.els2?arch=x86_64" } } } ], "category": "architecture", "name": "x86_64" }, { "branches": [ { "category": "product_version", "name": "libssh2-docs-0:1.8.0-4.el7_9.1.tuxcare.els1.noarch", "product": { "name": "libssh2-docs-0:1.8.0-4.el7_9.1.tuxcare.els1.noarch", "product_id": "libssh2-docs-0:1.8.0-4.el7_9.1.tuxcare.els1.noarch", "product_identification_helper": 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"libssh2-devel-0:1.8.0-4.el7_9.1.tuxcare.els1.i686", "relates_to_product_reference": "CentOS-7" }, { "category": "default_component_of", "full_product_name": { "name": "libssh2-docs-0:1.8.0-4.el7_9.1.tuxcare.els1.noarch as a component of Community Enterprise Operating System 7", "product_id": "CentOS-7:libssh2-docs-0:1.8.0-4.el7_9.1.tuxcare.els1.noarch" }, "product_reference": "libssh2-docs-0:1.8.0-4.el7_9.1.tuxcare.els1.noarch", "relates_to_product_reference": "CentOS-7" }, { "category": "default_component_of", "full_product_name": { "name": "libssh2-0:1.8.0-4.el7_9.1.tuxcare.els2.x86_64 as a component of Community Enterprise Operating System 7", "product_id": "CentOS-7:libssh2-0:1.8.0-4.el7_9.1.tuxcare.els2.x86_64" }, "product_reference": "libssh2-0:1.8.0-4.el7_9.1.tuxcare.els2.x86_64", "relates_to_product_reference": "CentOS-7" }, { "category": "default_component_of", "full_product_name": { "name": "libssh2-0:1.8.0-4.el7_9.1.tuxcare.els2.i686 as a component of Community Enterprise Operating System 7", "product_id": "CentOS-7:libssh2-0:1.8.0-4.el7_9.1.tuxcare.els2.i686" }, "product_reference": "libssh2-0:1.8.0-4.el7_9.1.tuxcare.els2.i686", "relates_to_product_reference": "CentOS-7" }, { "category": "default_component_of", "full_product_name": { "name": "libssh2-devel-0:1.8.0-4.el7_9.1.tuxcare.els2.x86_64 as a component of Community Enterprise Operating System 7", "product_id": "CentOS-7:libssh2-devel-0:1.8.0-4.el7_9.1.tuxcare.els2.x86_64" }, "product_reference": "libssh2-devel-0:1.8.0-4.el7_9.1.tuxcare.els2.x86_64", "relates_to_product_reference": "CentOS-7" }, { "category": "default_component_of", "full_product_name": { "name": "libssh2-devel-0:1.8.0-4.el7_9.1.tuxcare.els2.i686 as a component of Community Enterprise Operating System 7", "product_id": "CentOS-7:libssh2-devel-0:1.8.0-4.el7_9.1.tuxcare.els2.i686" }, "product_reference": "libssh2-devel-0:1.8.0-4.el7_9.1.tuxcare.els2.i686", "relates_to_product_reference": "CentOS-7" }, { "category": "default_component_of", "full_product_name": { "name": "libssh2-docs-0:1.8.0-4.el7_9.1.tuxcare.els2.noarch as a component of Community Enterprise Operating System 7", "product_id": "CentOS-7:libssh2-docs-0:1.8.0-4.el7_9.1.tuxcare.els2.noarch" }, "product_reference": "libssh2-docs-0:1.8.0-4.el7_9.1.tuxcare.els2.noarch", "relates_to_product_reference": "CentOS-7" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-55200", "cwe": { "id": "CWE-680", "name": "Integer Overflow to Buffer Overflow" }, "notes": [ { "category": "description", "text": "libssh2 through 1.11.1, fixed in commit 7acf3df contains an out-of-bounds write vulnerability in ssh2_transport_read() that fails to enforce upper bounds on packet_length field. Remote attackers can send crafted SSH packets with excessively large packet_length values to corrupt heap memory and achieve remote code execution.", "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" }, { "category": "other", "text": "TuxCare has assessed that this vulnerability does not impact any currently supported TuxCare products. This evaluation may change as new information becomes available. For additional details regarding this vulnerability and affected products, refer to the provided references.", "title": "Statement" } ], "product_status": { "known_not_affected": [ "CentOS-7:libssh2-0:1.8.0-4.el7_9.1.tuxcare.els1.i686", "CentOS-7:libssh2-0:1.8.0-4.el7_9.1.tuxcare.els1.x86_64", "CentOS-7:libssh2-0:1.8.0-4.el7_9.1.tuxcare.els2.i686", "CentOS-7:libssh2-0:1.8.0-4.el7_9.1.tuxcare.els2.x86_64", "CentOS-7:libssh2-devel-0:1.8.0-4.el7_9.1.tuxcare.els1.i686", "CentOS-7:libssh2-devel-0:1.8.0-4.el7_9.1.tuxcare.els1.x86_64", "CentOS-7:libssh2-devel-0:1.8.0-4.el7_9.1.tuxcare.els2.i686", "CentOS-7:libssh2-devel-0:1.8.0-4.el7_9.1.tuxcare.els2.x86_64", "CentOS-7:libssh2-docs-0:1.8.0-4.el7_9.1.tuxcare.els1.noarch", "CentOS-7:libssh2-docs-0:1.8.0-4.el7_9.1.tuxcare.els2.noarch" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2026-55200" }, { "category": "external", "summary": "https://github.com/libssh2/libssh2/commit/97acf3dfda80c91c3a8c9f2372546301d4a1a7a8", "url": "https://github.com/libssh2/libssh2/commit/97acf3dfda80c91c3a8c9f2372546301d4a1a7a8" }, { "category": "external", "summary": "https://github.com/libssh2/libssh2/pull/2052", "url": "https://github.com/libssh2/libssh2/pull/2052" }, { "category": "external", "summary": "https://www.vulncheck.com/advisories/libssh2-out-of-bounds-write-via-unchecked-packet-length-in-transport-c", "url": "https://www.vulncheck.com/advisories/libssh2-out-of-bounds-write-via-unchecked-packet-length-in-transport-c" }, { "category": "external", "summary": "https://github.com/bikini/exploitarium/tree/main/libssh2-cve-2026-55200-poc", "url": "https://github.com/bikini/exploitarium/tree/main/libssh2-cve-2026-55200-poc" }, { "category": "external", "summary": "https://web.archive.org/web/20260623211210/https://github.com/bikini/exploitarium/tree/main/libssh2-cve-2026-55200-poc", "url": "https://web.archive.org/web/20260623211210/https://github.com/bikini/exploitarium/tree/main/libssh2-cve-2026-55200-poc" } ], "release_date": "2026-06-17T20:17:00Z", "scores": [ { "cvss_v3": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 8.3, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L", "version": "3.1" }, "products": [ "CentOS-7:libssh2-0:1.8.0-4.el7_9.1.tuxcare.els1.i686", "CentOS-7:libssh2-0:1.8.0-4.el7_9.1.tuxcare.els1.x86_64", "CentOS-7:libssh2-0:1.8.0-4.el7_9.1.tuxcare.els2.i686", "CentOS-7:libssh2-0:1.8.0-4.el7_9.1.tuxcare.els2.x86_64", "CentOS-7:libssh2-devel-0:1.8.0-4.el7_9.1.tuxcare.els1.i686", "CentOS-7:libssh2-devel-0:1.8.0-4.el7_9.1.tuxcare.els1.x86_64", "CentOS-7:libssh2-devel-0:1.8.0-4.el7_9.1.tuxcare.els2.i686", "CentOS-7:libssh2-devel-0:1.8.0-4.el7_9.1.tuxcare.els2.x86_64", "CentOS-7:libssh2-docs-0:1.8.0-4.el7_9.1.tuxcare.els1.noarch", "CentOS-7:libssh2-docs-0:1.8.0-4.el7_9.1.tuxcare.els2.noarch" ] } ], "threats": [ { "category": "impact", "details": "Important" }, { "category": "impact", "date": "2026-07-09T11:44:45.420067Z", "details": "important", "product_ids": [ "CentOS-7:libssh2-0:1.8.0-4.el7_9.1.tuxcare.els1.i686", "CentOS-7:libssh2-0:1.8.0-4.el7_9.1.tuxcare.els1.x86_64", "CentOS-7:libssh2-0:1.8.0-4.el7_9.1.tuxcare.els2.i686", "CentOS-7:libssh2-0:1.8.0-4.el7_9.1.tuxcare.els2.x86_64", "CentOS-7:libssh2-devel-0:1.8.0-4.el7_9.1.tuxcare.els1.i686", "CentOS-7:libssh2-devel-0:1.8.0-4.el7_9.1.tuxcare.els1.x86_64", "CentOS-7:libssh2-devel-0:1.8.0-4.el7_9.1.tuxcare.els2.i686", "CentOS-7:libssh2-devel-0:1.8.0-4.el7_9.1.tuxcare.els2.x86_64", "CentOS-7:libssh2-docs-0:1.8.0-4.el7_9.1.tuxcare.els1.noarch", "CentOS-7:libssh2-docs-0:1.8.0-4.el7_9.1.tuxcare.els2.noarch" ] } ] } ] }