{ "document":{ "aggregate_severity":{ "namespace":"https://nvd.nist.gov/vuln-metrics/cvss", "text":"High" }, "category":"csaf_vex", "csaf_version":"2.0", "distribution":{ "tlp":{ "label":"WHITE", "url":"https:/www.first.org/tlp/" } }, "lang":"en", "notes":[ { "text":"libssh2 security update", "category":"general", "title":"Synopsis" }, { "text":"An update for libssh2 is now available for openEuler-22.03-LTS-SP4", "category":"general", "title":"Summary" }, { "text":"libssh2 is a library implementing the SSH2 protocol as defined by Internet Drafts: SECSH-TRANS(22), SECSH-USERAUTH(25), SECSH-CONNECTION(23), SECSH-ARCH(20), SECSH-FILEXFER(06)*, SECSH-DHGEX(04), and SECSH-NUMBERS(10).\n\nSecurity Fix(es):\n\nlibssh2 through 1.11.1, fixed in commit 2dae302, contains an out-of-bounds heap read vulnerability in the sftp_symlink() function in src/sftp.c that allows a malicious SSH server or man-in-the-middle attacker to disclose heap memory contents or cause a crash by sending a crafted SSH_FXP_NAME response. Attackers can supply a link_len value larger than the actual packet data in SSH_FXP_NAME responses for SFTP READLINK and REALPATH operations, triggering a heap buffer over-read of up to target_len minus one bytes due to the missing validation of available packet buffer size before the memcpy operation.(CVE-2025-15661)\n\nlibssh2 through 1.11.1, fixed in commit 1762685, contains a pre-authentication denial of service vulnerability in the SSH_MSG_EXT_INFO handler in src/packet.c that allows a malicious SSH server to cause a client CPU exhaustion loop by sending a crafted extension count value. A malicious server can set nr_extensions to 0xFFFFFFFF during key exchange, causing the client to spin in a tight CPU loop for over 60 seconds because return values from _libssh2_get_string() are unchecked and the session timeout does not apply to CPU-bound loops.(CVE-2026-55199)", "category":"general", "title":"Description" }, { "text":"An update for libssh2 is now available for openEuler-22.03-LTS-SP4.\n\nopenEuler Security has rated this update as having a security impact of high. A Common Vunlnerability Scoring System(CVSS)base score,which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section.", "category":"general", "title":"Topic" }, { "text":"High", "category":"general", "title":"Severity" }, { "text":"libssh2", "category":"general", "title":"Affected Component" } ], "publisher":{ "issuing_authority":"openEuler security committee", "name":"openEuler", "namespace":"https://www.openeuler.org", "contact_details":"openeuler-security@openeuler.org", "category":"vendor" }, "references":[ { "summary":"openEuler-SA-2026-3014", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3014" }, { "summary":"CVE-2025-15661", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2025-15661&packageName=libssh2" }, { "summary":"CVE-2026-55199", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-55199&packageName=libssh2" }, { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2025-15661" }, { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55199" }, { "summary":"openEuler-SA-2026-3014 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/advisories/2026/csaf-openeuler-sa-2026-3014.json" } ], "title":"An update for libssh2 is now available for openEuler-22.03-LTS-SP4", "tracking":{ "initial_release_date":"2026-07-21T09:46:22+08:00", "revision_history":[ { "date":"2026-07-21T09:46:22+08:00", "summary":"Initial", "number":"1.0.0" } ], "generator":{ "date":"2026-07-21T09:46:22+08:00", "engine":{ "name":"openEuler CSAF Tool V1.0" } }, "current_release_date":"2026-07-21T09:46:22+08:00", "id":"openEuler-SA-2026-3014", "version":"1.0.0", "status":"final" } }, "product_tree":{ "branches":[ { "name":"openEuler", "category":"vendor", "branches":[ { "name":"openEuler", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:22.03-LTS-SP4" }, "product_id":"openEuler-22.03-LTS-SP4", "name":"openEuler-22.03-LTS-SP4" }, "name":"openEuler-22.03-LTS-SP4", "category":"product_version" } ], "category":"product_name" }, { "name":"x86_64", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:22.03-LTS-SP4" }, "product_id":"libssh2-1.10.0-10.oe2203sp4.x86_64.rpm", "name":"libssh2-1.10.0-10.oe2203sp4.x86_64.rpm" }, "name":"libssh2-1.10.0-10.oe2203sp4.x86_64.rpm", "category":"product_version" }, { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:22.03-LTS-SP4" }, "product_id":"libssh2-debuginfo-1.10.0-10.oe2203sp4.x86_64.rpm", "name":"libssh2-debuginfo-1.10.0-10.oe2203sp4.x86_64.rpm" }, "name":"libssh2-debuginfo-1.10.0-10.oe2203sp4.x86_64.rpm", "category":"product_version" }, { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:22.03-LTS-SP4" }, "product_id":"libssh2-debugsource-1.10.0-10.oe2203sp4.x86_64.rpm", "name":"libssh2-debugsource-1.10.0-10.oe2203sp4.x86_64.rpm" }, "name":"libssh2-debugsource-1.10.0-10.oe2203sp4.x86_64.rpm", "category":"product_version" }, { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:22.03-LTS-SP4" }, "product_id":"libssh2-devel-1.10.0-10.oe2203sp4.x86_64.rpm", "name":"libssh2-devel-1.10.0-10.oe2203sp4.x86_64.rpm" }, "name":"libssh2-devel-1.10.0-10.oe2203sp4.x86_64.rpm", "category":"product_version" } ], "category":"architecture" }, { "name":"noarch", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:22.03-LTS-SP4" }, "product_id":"libssh2-help-1.10.0-10.oe2203sp4.noarch.rpm", "name":"libssh2-help-1.10.0-10.oe2203sp4.noarch.rpm" }, "name":"libssh2-help-1.10.0-10.oe2203sp4.noarch.rpm", "category":"product_version" } ], "category":"architecture" }, { "name":"aarch64", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:22.03-LTS-SP4" }, "product_id":"libssh2-1.10.0-10.oe2203sp4.aarch64.rpm", "name":"libssh2-1.10.0-10.oe2203sp4.aarch64.rpm" }, "name":"libssh2-1.10.0-10.oe2203sp4.aarch64.rpm", "category":"product_version" }, { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:22.03-LTS-SP4" }, "product_id":"libssh2-debuginfo-1.10.0-10.oe2203sp4.aarch64.rpm", "name":"libssh2-debuginfo-1.10.0-10.oe2203sp4.aarch64.rpm" }, "name":"libssh2-debuginfo-1.10.0-10.oe2203sp4.aarch64.rpm", "category":"product_version" }, { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:22.03-LTS-SP4" }, "product_id":"libssh2-debugsource-1.10.0-10.oe2203sp4.aarch64.rpm", "name":"libssh2-debugsource-1.10.0-10.oe2203sp4.aarch64.rpm" }, "name":"libssh2-debugsource-1.10.0-10.oe2203sp4.aarch64.rpm", "category":"product_version" }, { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:22.03-LTS-SP4" }, "product_id":"libssh2-devel-1.10.0-10.oe2203sp4.aarch64.rpm", "name":"libssh2-devel-1.10.0-10.oe2203sp4.aarch64.rpm" }, "name":"libssh2-devel-1.10.0-10.oe2203sp4.aarch64.rpm", "category":"product_version" } ], "category":"architecture" }, { "name":"src", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:22.03-LTS-SP4" }, "product_id":"libssh2-1.10.0-10.oe2203sp4.src.rpm", "name":"libssh2-1.10.0-10.oe2203sp4.src.rpm" }, "name":"libssh2-1.10.0-10.oe2203sp4.src.rpm", "category":"product_version" } ], "category":"architecture" } ] } ], "relationships":[ { "relates_to_product_reference":"openEuler-22.03-LTS-SP4", "product_reference":"libssh2-1.10.0-10.oe2203sp4.x86_64.rpm", "full_product_name":{ "product_id":"openEuler-22.03-LTS-SP4:libssh2-1.10.0-10.oe2203sp4.x86_64", "name":"libssh2-1.10.0-10.oe2203sp4.x86_64 as a component of openEuler-22.03-LTS-SP4" }, "category":"default_component_of" }, { "relates_to_product_reference":"openEuler-22.03-LTS-SP4", "product_reference":"libssh2-debuginfo-1.10.0-10.oe2203sp4.x86_64.rpm", "full_product_name":{ "product_id":"openEuler-22.03-LTS-SP4:libssh2-debuginfo-1.10.0-10.oe2203sp4.x86_64", "name":"libssh2-debuginfo-1.10.0-10.oe2203sp4.x86_64 as a component of openEuler-22.03-LTS-SP4" }, "category":"default_component_of" }, { "relates_to_product_reference":"openEuler-22.03-LTS-SP4", "product_reference":"libssh2-debugsource-1.10.0-10.oe2203sp4.x86_64.rpm", "full_product_name":{ "product_id":"openEuler-22.03-LTS-SP4:libssh2-debugsource-1.10.0-10.oe2203sp4.x86_64", "name":"libssh2-debugsource-1.10.0-10.oe2203sp4.x86_64 as a component of openEuler-22.03-LTS-SP4" }, "category":"default_component_of" }, { "relates_to_product_reference":"openEuler-22.03-LTS-SP4", "product_reference":"libssh2-devel-1.10.0-10.oe2203sp4.x86_64.rpm", "full_product_name":{ "product_id":"openEuler-22.03-LTS-SP4:libssh2-devel-1.10.0-10.oe2203sp4.x86_64", "name":"libssh2-devel-1.10.0-10.oe2203sp4.x86_64 as a component of openEuler-22.03-LTS-SP4" }, "category":"default_component_of" }, { "relates_to_product_reference":"openEuler-22.03-LTS-SP4", "product_reference":"libssh2-help-1.10.0-10.oe2203sp4.noarch.rpm", "full_product_name":{ "product_id":"openEuler-22.03-LTS-SP4:libssh2-help-1.10.0-10.oe2203sp4.noarch", "name":"libssh2-help-1.10.0-10.oe2203sp4.noarch as a component of openEuler-22.03-LTS-SP4" }, "category":"default_component_of" }, { "relates_to_product_reference":"openEuler-22.03-LTS-SP4", "product_reference":"libssh2-1.10.0-10.oe2203sp4.aarch64.rpm", "full_product_name":{ "product_id":"openEuler-22.03-LTS-SP4:libssh2-1.10.0-10.oe2203sp4.aarch64", "name":"libssh2-1.10.0-10.oe2203sp4.aarch64 as a component of openEuler-22.03-LTS-SP4" }, "category":"default_component_of" }, { "relates_to_product_reference":"openEuler-22.03-LTS-SP4", "product_reference":"libssh2-debuginfo-1.10.0-10.oe2203sp4.aarch64.rpm", "full_product_name":{ "product_id":"openEuler-22.03-LTS-SP4:libssh2-debuginfo-1.10.0-10.oe2203sp4.aarch64", "name":"libssh2-debuginfo-1.10.0-10.oe2203sp4.aarch64 as a component of openEuler-22.03-LTS-SP4" }, "category":"default_component_of" }, { "relates_to_product_reference":"openEuler-22.03-LTS-SP4", "product_reference":"libssh2-debugsource-1.10.0-10.oe2203sp4.aarch64.rpm", "full_product_name":{ "product_id":"openEuler-22.03-LTS-SP4:libssh2-debugsource-1.10.0-10.oe2203sp4.aarch64", "name":"libssh2-debugsource-1.10.0-10.oe2203sp4.aarch64 as a component of openEuler-22.03-LTS-SP4" }, "category":"default_component_of" }, { "relates_to_product_reference":"openEuler-22.03-LTS-SP4", "product_reference":"libssh2-devel-1.10.0-10.oe2203sp4.aarch64.rpm", "full_product_name":{ "product_id":"openEuler-22.03-LTS-SP4:libssh2-devel-1.10.0-10.oe2203sp4.aarch64", "name":"libssh2-devel-1.10.0-10.oe2203sp4.aarch64 as a component of openEuler-22.03-LTS-SP4" }, "category":"default_component_of" }, { "relates_to_product_reference":"openEuler-22.03-LTS-SP4", "product_reference":"libssh2-1.10.0-10.oe2203sp4.src.rpm", "full_product_name":{ "product_id":"openEuler-22.03-LTS-SP4:libssh2-1.10.0-10.oe2203sp4.src", "name":"libssh2-1.10.0-10.oe2203sp4.src as a component of openEuler-22.03-LTS-SP4" }, "category":"default_component_of" } ] }, "vulnerabilities":[ { "cve":"CVE-2025-15661", "notes":[ { "text":"libssh2 through 1.11.1, fixed in commit 2dae302, contains an out-of-bounds heap read vulnerability in the sftp_symlink() function in src/sftp.c that allows a malicious SSH server or man-in-the-middle attacker to disclose heap memory contents or cause a crash by sending a crafted SSH_FXP_NAME response. Attackers can supply a link_len value larger than the actual packet data in SSH_FXP_NAME responses for SFTP READLINK and REALPATH operations, triggering a heap buffer over-read of up to target_len minus one bytes due to the missing validation of available packet buffer size before the memcpy operation.", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":[ "openEuler-22.03-LTS-SP4:libssh2-1.10.0-10.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:libssh2-debuginfo-1.10.0-10.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:libssh2-debugsource-1.10.0-10.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:libssh2-devel-1.10.0-10.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:libssh2-help-1.10.0-10.oe2203sp4.noarch", "openEuler-22.03-LTS-SP4:libssh2-1.10.0-10.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:libssh2-debuginfo-1.10.0-10.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:libssh2-debugsource-1.10.0-10.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:libssh2-devel-1.10.0-10.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:libssh2-1.10.0-10.oe2203sp4.src" ] }, "remediations":[ { "product_ids":[ "openEuler-22.03-LTS-SP4:libssh2-1.10.0-10.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:libssh2-debuginfo-1.10.0-10.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:libssh2-debugsource-1.10.0-10.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:libssh2-devel-1.10.0-10.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:libssh2-help-1.10.0-10.oe2203sp4.noarch", "openEuler-22.03-LTS-SP4:libssh2-1.10.0-10.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:libssh2-debuginfo-1.10.0-10.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:libssh2-debugsource-1.10.0-10.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:libssh2-devel-1.10.0-10.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:libssh2-1.10.0-10.oe2203sp4.src" ], "details":"libssh2 security update", "category":"vendor_fix", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3014" } ], "scores":[ { "cvss_v3":{ "baseSeverity":"MEDIUM", "baseScore":6.5, "vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H", "version":"3.1" }, "products":[ "openEuler-22.03-LTS-SP4:libssh2-1.10.0-10.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:libssh2-debuginfo-1.10.0-10.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:libssh2-debugsource-1.10.0-10.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:libssh2-devel-1.10.0-10.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:libssh2-help-1.10.0-10.oe2203sp4.noarch", "openEuler-22.03-LTS-SP4:libssh2-1.10.0-10.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:libssh2-debuginfo-1.10.0-10.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:libssh2-debugsource-1.10.0-10.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:libssh2-devel-1.10.0-10.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:libssh2-1.10.0-10.oe2203sp4.src" ] } ], "threats":[ { "details":"Medium", "category":"impact" } ], "title":"CVE-2025-15661" }, { "cve":"CVE-2026-55199", "notes":[ { "text":"libssh2 through 1.11.1, fixed in commit 1762685, contains a pre-authentication denial of service vulnerability in the SSH_MSG_EXT_INFO handler in src/packet.c that allows a malicious SSH server to cause a client CPU exhaustion loop by sending a crafted extension count value. A malicious server can set nr_extensions to 0xFFFFFFFF during key exchange, causing the client to spin in a tight CPU loop for over 60 seconds because return values from _libssh2_get_string() are unchecked and the session timeout does not apply to CPU-bound loops.", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":[ "openEuler-22.03-LTS-SP4:libssh2-1.10.0-10.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:libssh2-debuginfo-1.10.0-10.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:libssh2-debugsource-1.10.0-10.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:libssh2-devel-1.10.0-10.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:libssh2-help-1.10.0-10.oe2203sp4.noarch", "openEuler-22.03-LTS-SP4:libssh2-1.10.0-10.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:libssh2-debuginfo-1.10.0-10.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:libssh2-debugsource-1.10.0-10.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:libssh2-devel-1.10.0-10.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:libssh2-1.10.0-10.oe2203sp4.src" ] }, "remediations":[ { "product_ids":[ "openEuler-22.03-LTS-SP4:libssh2-1.10.0-10.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:libssh2-debuginfo-1.10.0-10.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:libssh2-debugsource-1.10.0-10.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:libssh2-devel-1.10.0-10.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:libssh2-help-1.10.0-10.oe2203sp4.noarch", "openEuler-22.03-LTS-SP4:libssh2-1.10.0-10.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:libssh2-debuginfo-1.10.0-10.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:libssh2-debugsource-1.10.0-10.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:libssh2-devel-1.10.0-10.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:libssh2-1.10.0-10.oe2203sp4.src" ], "details":"libssh2 security update", "category":"vendor_fix", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3014" } ], "scores":[ { "cvss_v3":{ "baseSeverity":"HIGH", "baseScore":7.5, "vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version":"3.1" }, "products":[ "openEuler-22.03-LTS-SP4:libssh2-1.10.0-10.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:libssh2-debuginfo-1.10.0-10.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:libssh2-debugsource-1.10.0-10.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:libssh2-devel-1.10.0-10.oe2203sp4.x86_64", "openEuler-22.03-LTS-SP4:libssh2-help-1.10.0-10.oe2203sp4.noarch", "openEuler-22.03-LTS-SP4:libssh2-1.10.0-10.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:libssh2-debuginfo-1.10.0-10.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:libssh2-debugsource-1.10.0-10.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:libssh2-devel-1.10.0-10.oe2203sp4.aarch64", "openEuler-22.03-LTS-SP4:libssh2-1.10.0-10.oe2203sp4.src" ] } ], "threats":[ { "details":"High", "category":"impact" } ], "title":"CVE-2026-55199" } ] }