{ "document": { "aggregate_severity": { "namespace": "https://access.redhat.com/security/updates/classification/", "text": "Important" }, "category": "csaf_vex", "csaf_version": "2.0", "distribution": { "text": "Copyright © Red Hat, Inc. All rights reserved.", "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 Red Hat Inc. and provide a link to the original.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://access.redhat.com/security/team/contact/", "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.", "name": "Red Hat Product Security", "namespace": "https://www.redhat.com" }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-7598.json" } ], "title": "libssh2: integer overflow via large username or password arguments", "tracking": { "current_release_date": "2026-08-31T17:42:48+00:00", "generator": { "date": "2026-08-31T17:42:48+00:00", "engine": { "name": "Red Hat SDEngine", "version": "5.3.16" } }, "id": "CVE-2026-7598", "initial_release_date": "2026-05-01T21:30:11.006000+00:00", 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"default_component_of", "full_product_name": { "name": "rhtpa/rhtpa-trustification-service-rhel9 as a component of Red Hat Trusted Profile Analyzer", "product_id": "red_hat_trusted_profile_analyzer:rhtpa/rhtpa-trustification-service-rhel9" }, "product_reference": "rhtpa/rhtpa-trustification-service-rhel9", "relates_to_product_reference": "red_hat_trusted_profile_analyzer" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-7598", "cwe": { "id": "CWE-190", "name": "Integer Overflow or Wraparound" }, "discovery_date": "2026-05-01T22:00:54.329797+00:00", "flags": [ { "label": "vulnerable_code_not_present", "product_ids": [ "7Server-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.i686", "7Server-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.ppc", "7Server-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.ppc64", "7Server-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.ppc64le", "7Server-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.s390", "7Server-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.s390x", "7Server-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.x86_64", "7Server-optional-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.i686", "7Server-optional-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.ppc", "7Server-optional-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.ppc64", "7Server-optional-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.ppc64le", "7Server-optional-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.s390", "7Server-optional-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.s390x", "7Server-optional-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.x86_64", "7Server-optional-ELS:libssh2-docs-0:1.8.0-4.el7_9.2.noarch", "red_hat_openshift_update_service:openshift-update-service/openshift-update-service-rhel8" ] }, { "label": "component_not_present", "product_ids": [ "red_hat_openshift_container_platform_4:conmon-rs", "red_hat_openshift_container_platform_4:conmon-rs.src" ] } ], "ids": [ { "system_name": "Red Hat Bugzilla ID", "text": "2464597" } ], "notes": [ { "category": "description", "text": "A flaw was found in the libssh2 library. A remote attacker can exploit an integer overflow vulnerability in the `userauth_password` function by manipulating the `username_len` or `password_len` arguments and cause a heap-based buffer overflow. This leads to a crash to the application linked to the library and potentially allows arbitrary code execution.", "title": "Vulnerability description" }, { "category": "summary", "text": "libssh2: integer overflow via large username or password arguments", "title": "Vulnerability summary" }, { "category": "other", "text": "To exploit this flaw, an attacker needs to be able to supply an excessively large value to the arguments of the `userauth_password` function, typically to an application processing untrusted SSH authentication requests. The primary security impact of this issue is a crash to the application linked to the library due to memory corruption, potentially allowing arbitrary code execution.\n\nDefault Red Hat Enterprise Linux security features, including SELinux enforcement, Address Space Layout Randomization (ASLR) and NX (No-Execute) stack protection, significantly increase the difficulty of achieving arbitrary code execution, limiting the impact of this vulnerability.\n\nDue to these reasons, this vulnerability has been rated with an important severity.", "title": "Statement" }, { "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": [ "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.i686", "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.ppc", "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.ppc64", "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.ppc64le", "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.s390", "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.s390x", "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.src", "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.x86_64", "7Server-optional-ELS:libssh2-devel-0:1.8.0-4.el7_9.2.i686", "7Server-optional-ELS:libssh2-devel-0:1.8.0-4.el7_9.2.ppc", "7Server-optional-ELS:libssh2-devel-0:1.8.0-4.el7_9.2.ppc64", "7Server-optional-ELS:libssh2-devel-0:1.8.0-4.el7_9.2.ppc64le", "7Server-optional-ELS:libssh2-devel-0:1.8.0-4.el7_9.2.s390", "7Server-optional-ELS:libssh2-devel-0:1.8.0-4.el7_9.2.s390x", "7Server-optional-ELS:libssh2-devel-0:1.8.0-4.el7_9.2.x86_64", "Red Hat Hardened Images:libssh2-main@aarch64", "Red Hat Hardened Images:libssh2-main@noarch", "Red Hat Hardened Images:libssh2-main@src", "Red Hat Hardened Images:libssh2-main@x86_64", "Red Hat Hardened Images:rust-main@aarch64", "Red Hat Hardened Images:rust-main@noarch", "Red Hat Hardened Images:rust-main@src", "Red Hat Hardened Images:rust-main@x86_64" ], "known_affected": [ "red_hat_enterprise_linux_6:libssh2", "red_hat_enterprise_linux_6:libssh2-devel", "red_hat_enterprise_linux_6:libssh2-docs", "red_hat_enterprise_linux_6:libssh2.src", "red_hat_trusted_profile_analyzer:rhtpa/rhtpa-trustification-service-rhel9" ], "known_not_affected": [ "7Server-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.i686", "7Server-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.ppc", "7Server-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.ppc64", "7Server-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.ppc64le", "7Server-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.s390", "7Server-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.s390x", "7Server-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.x86_64", "7Server-optional-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.i686", "7Server-optional-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.ppc", "7Server-optional-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.ppc64", "7Server-optional-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.ppc64le", "7Server-optional-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.s390", "7Server-optional-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.s390x", "7Server-optional-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.x86_64", "7Server-optional-ELS:libssh2-docs-0:1.8.0-4.el7_9.2.noarch", "red_hat_openshift_container_platform_4:conmon-rs", "red_hat_openshift_container_platform_4:conmon-rs.src", "red_hat_openshift_update_service:openshift-update-service/openshift-update-service-rhel8" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://access.redhat.com/security/cve/CVE-2026-7598" }, { "category": "external", "summary": "RHBZ#2464597", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464597" }, { "category": "external", "summary": "https://www.cve.org/CVERecord?id=CVE-2026-7598", "url": "https://www.cve.org/CVERecord?id=CVE-2026-7598" }, { "category": "external", "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-7598", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-7598" }, { "category": "external", "summary": "https://github.com/libssh2/libssh2/", "url": "https://github.com/libssh2/libssh2/" }, { "category": "external", "summary": "https://github.com/libssh2/libssh2/commit/256d04b60d80bf1190e96b0ad1e91b2174d744b1", "url": "https://github.com/libssh2/libssh2/commit/256d04b60d80bf1190e96b0ad1e91b2174d744b1" }, { "category": "external", "summary": "https://github.com/libssh2/libssh2/pull/1858", "url": "https://github.com/libssh2/libssh2/pull/1858" }, { "category": "external", "summary": "https://vuldb.com/submit/805564", "url": "https://vuldb.com/submit/805564" }, { "category": "external", "summary": "https://vuldb.com/vuln/360555", "url": "https://vuldb.com/vuln/360555" }, { "category": "external", "summary": "https://vuldb.com/vuln/360555/cti", "url": "https://vuldb.com/vuln/360555/cti" } ], "release_date": "2026-05-01T21:30:11.006000+00:00", "remediations": [ { "category": "vendor_fix", "date": "2026-08-31T17:42:29+00:00", "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258", "product_ids": [ "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.i686", "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.ppc", "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.ppc64", "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.ppc64le", "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.s390", "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.s390x", "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.src", "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.x86_64", "7Server-optional-ELS:libssh2-devel-0:1.8.0-4.el7_9.2.i686", "7Server-optional-ELS:libssh2-devel-0:1.8.0-4.el7_9.2.ppc", "7Server-optional-ELS:libssh2-devel-0:1.8.0-4.el7_9.2.ppc64", "7Server-optional-ELS:libssh2-devel-0:1.8.0-4.el7_9.2.ppc64le", "7Server-optional-ELS:libssh2-devel-0:1.8.0-4.el7_9.2.s390", "7Server-optional-ELS:libssh2-devel-0:1.8.0-4.el7_9.2.s390x", "7Server-optional-ELS:libssh2-devel-0:1.8.0-4.el7_9.2.x86_64" ], "url": "https://access.redhat.com/errata/RHSA-2026:61752" }, { "category": "vendor_fix", "date": "2026-04-08T10:22:24+00:00", "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/", "product_ids": [ "Red Hat Hardened Images:libssh2-main@aarch64", "Red Hat Hardened Images:libssh2-main@noarch", "Red Hat Hardened Images:libssh2-main@src", "Red Hat Hardened Images:libssh2-main@x86_64" ], "url": "https://access.redhat.com/errata/RHSA-2026:7021" }, { "category": "vendor_fix", "date": "2026-05-13T02:44:33+00:00", "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/", "product_ids": [ "Red Hat Hardened Images:rust-main@aarch64", "Red Hat Hardened Images:rust-main@noarch", "Red Hat Hardened Images:rust-main@src", "Red Hat Hardened Images:rust-main@x86_64" ], "url": "https://access.redhat.com/errata/RHSA-2026:16736" }, { "category": "workaround", "details": "To mitigate this flaw, applications linked to the libssh2 library should be configured or updated to exclusively use public key authentication. Explicitly disabling password-based logins prevents the application from executing the vulnerable userauth_password function.", "product_ids": [ "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.i686", "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.ppc", "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.ppc64", "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.ppc64le", "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.s390", "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.s390x", "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.src", "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.x86_64", "7Server-optional-ELS:libssh2-devel-0:1.8.0-4.el7_9.2.i686", "7Server-optional-ELS:libssh2-devel-0:1.8.0-4.el7_9.2.ppc", "7Server-optional-ELS:libssh2-devel-0:1.8.0-4.el7_9.2.ppc64", "7Server-optional-ELS:libssh2-devel-0:1.8.0-4.el7_9.2.ppc64le", "7Server-optional-ELS:libssh2-devel-0:1.8.0-4.el7_9.2.s390", "7Server-optional-ELS:libssh2-devel-0:1.8.0-4.el7_9.2.s390x", "7Server-optional-ELS:libssh2-devel-0:1.8.0-4.el7_9.2.x86_64", "Red Hat Hardened Images:libssh2-main@aarch64", "Red Hat Hardened Images:libssh2-main@noarch", "Red Hat Hardened Images:libssh2-main@src", "Red Hat Hardened Images:libssh2-main@x86_64", "Red Hat Hardened Images:rust-main@aarch64", "Red Hat Hardened Images:rust-main@noarch", "Red Hat Hardened Images:rust-main@src", "Red Hat Hardened Images:rust-main@x86_64", "red_hat_enterprise_linux_6:libssh2", "red_hat_enterprise_linux_6:libssh2-devel", "red_hat_enterprise_linux_6:libssh2-docs", "red_hat_enterprise_linux_6:libssh2.src", "red_hat_trusted_profile_analyzer:rhtpa/rhtpa-trustification-service-rhel9" ] }, { "category": "no_fix_planned", "details": "Will not fix", "product_ids": [ "red_hat_enterprise_linux_6:libssh2", "red_hat_enterprise_linux_6:libssh2-devel", "red_hat_enterprise_linux_6:libssh2-docs", "red_hat_enterprise_linux_6:libssh2.src" ] }, { "category": "none_available", "details": "Affected", "product_ids": [ "red_hat_trusted_profile_analyzer:rhtpa/rhtpa-trustification-service-rhel9" ] } ], "scores": [ { "cvss_v3": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H", "version": "3.1" }, "products": [ "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.i686", "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.ppc", "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.ppc64", "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.ppc64le", "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.s390", "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.s390x", "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.src", "7Server-ELS:libssh2-0:1.8.0-4.el7_9.2.x86_64", "7Server-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.i686", "7Server-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.ppc", "7Server-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.ppc64", "7Server-ELS:libssh2-debuginfo-0:1.8.0-4.el7_9.2.ppc64le", 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Images:libssh2-main@x86_64", "Red Hat Hardened Images:rust-main@aarch64", "Red Hat Hardened Images:rust-main@noarch", "Red Hat Hardened Images:rust-main@src", "Red Hat Hardened Images:rust-main@x86_64", "red_hat_enterprise_linux_6:libssh2", "red_hat_enterprise_linux_6:libssh2-devel", "red_hat_enterprise_linux_6:libssh2-docs", "red_hat_enterprise_linux_6:libssh2.src", "red_hat_openshift_container_platform_4:conmon-rs", "red_hat_openshift_container_platform_4:conmon-rs.src", "red_hat_openshift_update_service:openshift-update-service/openshift-update-service-rhel8", "red_hat_trusted_profile_analyzer:rhtpa/rhtpa-trustification-service-rhel9" ] } ], "title": "libssh2: integer overflow via large username or password arguments" } ] }