{ "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: name-constraints bypass with excluded-only parent CA\n - debian/patches/CVE-2026-42011.patch: take permitted name\n constraints into account when a prior CA in the chain carried only\n excluded constraints, so a constrained sub-CA can no longer issue\n certificates outside its permitted scope, in\n lib/x509/name_constraints.c.\n - CVE-2026-42011\n * SECURITY UPDATE: CN fallback not precluded by URI SAN\n - debian/patches/CVE-2026-42012.patch: treat a URI subject\n alternative name as precluding the fallback to Common Name\n hostname matching, per RFC 6125 6.4.4, in\n lib/x509/hostname-verify.c.\n - CVE-2026-42012\n * SECURITY UPDATE: CN/DN fallback not precluded by oversized SAN\n - debian/patches/CVE-2026-42013.patch: keep the CN (hostname) and\n DN-email fallbacks disabled when a subject alternative name is\n oversized instead of silently ignoring it, per RFC 6125 6.4.4, in\n lib/x509/hostname-verify.c and lib/x509/email-verify.c.\n - CVE-2026-42013\n * SECURITY UPDATE: PKCS#12 bag out-of-bounds write\n - debian/patches/CVE-2026-42015.patch: fix an off-by-one in the\n PKCS#12 bag element bounds check that allowed writing past the\n 32-element array, in lib/x509/pkcs12_bag.c.\n - CVE-2026-42015", "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-2026:1784268522", "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1784268522" }, { "category": "self", "summary": "Canonical URL", "url": "https://security.tuxcare.com/csaf/v2/els_os/ubuntu18.04els/advisories/2026/clsa-2026_1784268522.json" } ], "tracking": { "current_release_date": "2026-07-17T06:10:31Z", "generator": { "date": "2026-07-17T06:10:31Z", "engine": { "name": "pyCSAF" } }, "id": "CLSA-2026:1784268522", "initial_release_date": "2026-07-17T06:10:31Z", "revision_history": [ { "date": "2026-07-17T06:10:31Z", "number": "1", "summary": "Initial version" } ], "status": "final", "version": "1" }, "title": "Fix CVE(s): CVE-2026-42011, CVE-2026-42012, CVE-2026-42013, CVE-2026-42015" }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Ubuntu 18.04", "product": { "name": "Ubuntu 18.04", "product_id": "Ubuntu-18", "product_identification_helper": { "cpe": "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*" } } } ], "category": "product_family", "name": "Ubuntu" } ], "category": "vendor", "name": "Canonical Ltd." }, { "branches": [ { "branches": [ { "category": "product_version", "name": "libgnutls28-dev-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "product": { "name": 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18.04", "product_id": "Ubuntu-18:libgnutls-openssl27-0:3.5.18-1ubuntu1.6+tuxcare.els1.amd64" }, "product_reference": "libgnutls-openssl27-0:3.5.18-1ubuntu1.6+tuxcare.els1.amd64", "relates_to_product_reference": "Ubuntu-18" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-42013", "cwe": { "id": "CWE-1284", "name": "Improper Validation of Specified Quantity in Input" }, "notes": [ { "category": "description", "text": "A flaw was found in gnutls. When validating certificates, an oversized Subject Alternative Name (SAN) could cause the validation process to incorrectly fall back to checking the Common Name (CN) field. This could allow a remote attacker to bypass proper certificate validation, potentially leading to spoofing or man-in-the-middle attacks.", "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-18:gnutls-bin-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:gnutls-doc-0:3.5.18-1ubuntu1.6+tuxcare.els5.all", "Ubuntu-18:libgnutls-dane0-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls-openssl27-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls28-dev-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls30-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutlsxx28-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64" ], "known_affected": [ 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"category": "external", "summary": "https://access.redhat.com/security/cve/CVE-2026-42013", "url": "https://access.redhat.com/security/cve/CVE-2026-42013" }, { "category": "external", "summary": "https://bugzilla.redhat.com/show_bug.cgi?id=2467448", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467448" } ], "release_date": "2026-05-26T22:16:00Z", "remediations": [ { "category": "vendor_fix", "date": "2026-07-17T06:08:47.595248Z", "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els/releases/CLSA-2026:1784268522", "product_ids": [ "Ubuntu-18:gnutls-bin-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:gnutls-doc-0:3.5.18-1ubuntu1.6+tuxcare.els5.all", "Ubuntu-18:libgnutls-dane0-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls-openssl27-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls28-dev-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls30-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutlsxx28-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64" ], "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1784268522" }, { "category": "none_available", "date": "2026-05-26T22:16:00Z", "details": "Affected", "product_ids": [ "Ubuntu-18:gnutls-bin-0:3.5.18-1ubuntu1.6+tuxcare.els1.amd64", "Ubuntu-18:gnutls-bin-0:3.5.18-1ubuntu1.6+tuxcare.els2.amd64", "Ubuntu-18:gnutls-bin-0:3.5.18-1ubuntu1.6+tuxcare.els3.amd64", "Ubuntu-18:gnutls-bin-0:3.5.18-1ubuntu1.6+tuxcare.els4.amd64", "Ubuntu-18:gnutls-doc-0:3.5.18-1ubuntu1.6+tuxcare.els1.all", "Ubuntu-18:gnutls-doc-0:3.5.18-1ubuntu1.6+tuxcare.els2.all", "Ubuntu-18:gnutls-doc-0:3.5.18-1ubuntu1.6+tuxcare.els3.all", "Ubuntu-18:gnutls-doc-0:3.5.18-1ubuntu1.6+tuxcare.els4.all", "Ubuntu-18:libgnutls-dane0-0:3.5.18-1ubuntu1.6+tuxcare.els1.amd64", "Ubuntu-18:libgnutls-dane0-0:3.5.18-1ubuntu1.6+tuxcare.els2.amd64", "Ubuntu-18:libgnutls-dane0-0:3.5.18-1ubuntu1.6+tuxcare.els3.amd64", "Ubuntu-18:libgnutls-dane0-0:3.5.18-1ubuntu1.6+tuxcare.els4.amd64", "Ubuntu-18:libgnutls-openssl27-0:3.5.18-1ubuntu1.6+tuxcare.els1.amd64", "Ubuntu-18:libgnutls-openssl27-0:3.5.18-1ubuntu1.6+tuxcare.els2.amd64", "Ubuntu-18:libgnutls-openssl27-0:3.5.18-1ubuntu1.6+tuxcare.els3.amd64", "Ubuntu-18:libgnutls-openssl27-0:3.5.18-1ubuntu1.6+tuxcare.els4.amd64", "Ubuntu-18:libgnutls28-dev-0:3.5.18-1ubuntu1.6+tuxcare.els1.amd64", "Ubuntu-18:libgnutls28-dev-0:3.5.18-1ubuntu1.6+tuxcare.els2.amd64", "Ubuntu-18:libgnutls28-dev-0:3.5.18-1ubuntu1.6+tuxcare.els3.amd64", "Ubuntu-18:libgnutls28-dev-0:3.5.18-1ubuntu1.6+tuxcare.els4.amd64", "Ubuntu-18:libgnutls30-0:3.5.18-1ubuntu1.6+tuxcare.els1.amd64", "Ubuntu-18:libgnutls30-0:3.5.18-1ubuntu1.6+tuxcare.els2.amd64", "Ubuntu-18:libgnutls30-0:3.5.18-1ubuntu1.6+tuxcare.els3.amd64", "Ubuntu-18:libgnutls30-0:3.5.18-1ubuntu1.6+tuxcare.els4.amd64", "Ubuntu-18:libgnutlsxx28-0:3.5.18-1ubuntu1.6+tuxcare.els1.amd64", "Ubuntu-18:libgnutlsxx28-0:3.5.18-1ubuntu1.6+tuxcare.els2.amd64", "Ubuntu-18:libgnutlsxx28-0:3.5.18-1ubuntu1.6+tuxcare.els3.amd64", "Ubuntu-18:libgnutlsxx28-0:3.5.18-1ubuntu1.6+tuxcare.els4.amd64" ] } ], "scores": [ { "cvss_v3": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N", "version": "3.1" }, "products": [ "Ubuntu-18:gnutls-bin-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:gnutls-doc-0:3.5.18-1ubuntu1.6+tuxcare.els5.all", "Ubuntu-18:libgnutls-dane0-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls-openssl27-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls28-dev-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls30-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutlsxx28-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64" ] } ], "threats": [ { "category": "impact", "details": "Important" } ] }, { "cve": "CVE-2026-42012", "cwe": { "id": "CWE-295", "name": "Improper Certificate Validation" }, "notes": [ { "category": "description", "text": "A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted certificate that contains Uniform Resource Identifier (URI) or Service (SRV) Subject Alternative Names (SANs). This could cause the certificate validation process to incorrectly fall back to checking DNS hostnames against the Common Name (CN), potentially allowing the attacker to spoof legitimate services or intercept sensitive information.", "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-18:gnutls-bin-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:gnutls-doc-0:3.5.18-1ubuntu1.6+tuxcare.els5.all", "Ubuntu-18:libgnutls-dane0-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls-openssl27-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls28-dev-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls30-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", 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URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2026-42012" }, { "category": "external", "summary": "https://access.redhat.com/security/cve/CVE-2026-42012", "url": "https://access.redhat.com/security/cve/CVE-2026-42012" }, { "category": "external", "summary": "https://bugzilla.redhat.com/show_bug.cgi?id=2467441", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467441" } ], "release_date": "2026-05-26T22:16:00Z", "remediations": [ { "category": "vendor_fix", "date": "2026-07-17T06:08:47.595248Z", "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els/releases/CLSA-2026:1784268522", "product_ids": [ "Ubuntu-18:gnutls-bin-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:gnutls-doc-0:3.5.18-1ubuntu1.6+tuxcare.els5.all", "Ubuntu-18:libgnutls-dane0-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls-openssl27-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls28-dev-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls30-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutlsxx28-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64" ], "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1784268522" }, { "category": "none_available", "date": "2026-05-26T22:16:00Z", "details": "Affected", "product_ids": [ "Ubuntu-18:gnutls-bin-0:3.5.18-1ubuntu1.6+tuxcare.els1.amd64", "Ubuntu-18:gnutls-bin-0:3.5.18-1ubuntu1.6+tuxcare.els2.amd64", "Ubuntu-18:gnutls-bin-0:3.5.18-1ubuntu1.6+tuxcare.els3.amd64", "Ubuntu-18:gnutls-bin-0:3.5.18-1ubuntu1.6+tuxcare.els4.amd64", "Ubuntu-18:gnutls-doc-0:3.5.18-1ubuntu1.6+tuxcare.els1.all", "Ubuntu-18:gnutls-doc-0:3.5.18-1ubuntu1.6+tuxcare.els2.all", "Ubuntu-18:gnutls-doc-0:3.5.18-1ubuntu1.6+tuxcare.els3.all", "Ubuntu-18:gnutls-doc-0:3.5.18-1ubuntu1.6+tuxcare.els4.all", "Ubuntu-18:libgnutls-dane0-0:3.5.18-1ubuntu1.6+tuxcare.els1.amd64", "Ubuntu-18:libgnutls-dane0-0:3.5.18-1ubuntu1.6+tuxcare.els2.amd64", "Ubuntu-18:libgnutls-dane0-0:3.5.18-1ubuntu1.6+tuxcare.els3.amd64", "Ubuntu-18:libgnutls-dane0-0:3.5.18-1ubuntu1.6+tuxcare.els4.amd64", "Ubuntu-18:libgnutls-openssl27-0:3.5.18-1ubuntu1.6+tuxcare.els1.amd64", "Ubuntu-18:libgnutls-openssl27-0:3.5.18-1ubuntu1.6+tuxcare.els2.amd64", "Ubuntu-18:libgnutls-openssl27-0:3.5.18-1ubuntu1.6+tuxcare.els3.amd64", "Ubuntu-18:libgnutls-openssl27-0:3.5.18-1ubuntu1.6+tuxcare.els4.amd64", "Ubuntu-18:libgnutls28-dev-0:3.5.18-1ubuntu1.6+tuxcare.els1.amd64", "Ubuntu-18:libgnutls28-dev-0:3.5.18-1ubuntu1.6+tuxcare.els2.amd64", "Ubuntu-18:libgnutls28-dev-0:3.5.18-1ubuntu1.6+tuxcare.els3.amd64", "Ubuntu-18:libgnutls28-dev-0:3.5.18-1ubuntu1.6+tuxcare.els4.amd64", "Ubuntu-18:libgnutls30-0:3.5.18-1ubuntu1.6+tuxcare.els1.amd64", "Ubuntu-18:libgnutls30-0:3.5.18-1ubuntu1.6+tuxcare.els2.amd64", "Ubuntu-18:libgnutls30-0:3.5.18-1ubuntu1.6+tuxcare.els3.amd64", "Ubuntu-18:libgnutls30-0:3.5.18-1ubuntu1.6+tuxcare.els4.amd64", "Ubuntu-18:libgnutlsxx28-0:3.5.18-1ubuntu1.6+tuxcare.els1.amd64", "Ubuntu-18:libgnutlsxx28-0:3.5.18-1ubuntu1.6+tuxcare.els2.amd64", "Ubuntu-18:libgnutlsxx28-0:3.5.18-1ubuntu1.6+tuxcare.els3.amd64", "Ubuntu-18:libgnutlsxx28-0:3.5.18-1ubuntu1.6+tuxcare.els4.amd64" ] } ], "scores": [ { "cvss_v3": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N", "version": "3.1" }, "products": [ "Ubuntu-18:gnutls-bin-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:gnutls-doc-0:3.5.18-1ubuntu1.6+tuxcare.els5.all", "Ubuntu-18:libgnutls-dane0-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls-openssl27-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls28-dev-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls30-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutlsxx28-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64" ] } ], "threats": [ { "category": "impact", "details": "Important" } ] }, { "cve": "CVE-2026-42011", "cwe": { "id": "CWE-295", "name": "Improper Certificate Validation" }, "notes": [ { "category": "description", "text": "A flaw was found in gnutls. This vulnerability occurs because permitted name constraints were incorrectly ignored when previous Certificate Authorities (CAs) only had excluded name constraints. A remote attacker could exploit this to bypass critical name constraint checks during certificate validation. This bypass could lead to the acceptance of invalid certificates, potentially enabling spoofing or man-in-the-middle attacks against affected systems.", "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-18:gnutls-bin-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:gnutls-doc-0:3.5.18-1ubuntu1.6+tuxcare.els5.all", "Ubuntu-18:libgnutls-dane0-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls-openssl27-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls28-dev-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls30-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutlsxx28-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64" ], "known_affected": [ 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"release_date": "2026-05-07T15:16:00Z", "remediations": [ { "category": "vendor_fix", "date": "2026-07-17T06:08:47.595248Z", "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els/releases/CLSA-2026:1784268522", "product_ids": [ "Ubuntu-18:gnutls-bin-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:gnutls-doc-0:3.5.18-1ubuntu1.6+tuxcare.els5.all", "Ubuntu-18:libgnutls-dane0-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls-openssl27-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls28-dev-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls30-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutlsxx28-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64" ], "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1784268522" }, { "category": "none_available", "date": "2026-05-07T15:16:00Z", "details": "Affected", "product_ids": [ "Ubuntu-18:gnutls-bin-0:3.5.18-1ubuntu1.6+tuxcare.els1.amd64", 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"Ubuntu-18:libgnutls28-dev-0:3.5.18-1ubuntu1.6+tuxcare.els1.amd64", "Ubuntu-18:libgnutls28-dev-0:3.5.18-1ubuntu1.6+tuxcare.els2.amd64", "Ubuntu-18:libgnutls28-dev-0:3.5.18-1ubuntu1.6+tuxcare.els3.amd64", "Ubuntu-18:libgnutls28-dev-0:3.5.18-1ubuntu1.6+tuxcare.els4.amd64", "Ubuntu-18:libgnutls30-0:3.5.18-1ubuntu1.6+tuxcare.els1.amd64", "Ubuntu-18:libgnutls30-0:3.5.18-1ubuntu1.6+tuxcare.els2.amd64", "Ubuntu-18:libgnutls30-0:3.5.18-1ubuntu1.6+tuxcare.els3.amd64", "Ubuntu-18:libgnutls30-0:3.5.18-1ubuntu1.6+tuxcare.els4.amd64", "Ubuntu-18:libgnutlsxx28-0:3.5.18-1ubuntu1.6+tuxcare.els1.amd64", "Ubuntu-18:libgnutlsxx28-0:3.5.18-1ubuntu1.6+tuxcare.els2.amd64", "Ubuntu-18:libgnutlsxx28-0:3.5.18-1ubuntu1.6+tuxcare.els3.amd64", "Ubuntu-18:libgnutlsxx28-0:3.5.18-1ubuntu1.6+tuxcare.els4.amd64" ] } ], "scores": [ { "cvss_v3": { "attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N", "version": "3.1" }, "products": [ "Ubuntu-18:gnutls-bin-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:gnutls-doc-0:3.5.18-1ubuntu1.6+tuxcare.els5.all", "Ubuntu-18:libgnutls-dane0-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls-openssl27-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls28-dev-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls30-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutlsxx28-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64" ] } ], "threats": [ { "category": "impact", "details": "Important" } ] }, { "cve": "CVE-2026-42015", "cwe": { "id": "CWE-193", "name": "Off-by-one Error" }, "notes": [ { "category": "description", "text": "A flaw was found in gnutls. An off-by-one error exists in the PKCS#12 bag element bounds check. This vulnerability allows an remote attacker to write past the internal array of a PKCS#12 bag when appending to a bag that already contains 32 elements. This memory corruption could lead to a denial of service (DoS) or potentially other unspecified impacts.", "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-18:gnutls-bin-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:gnutls-doc-0:3.5.18-1ubuntu1.6+tuxcare.els5.all", "Ubuntu-18:libgnutls-dane0-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls-openssl27-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls28-dev-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls30-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutlsxx28-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64" ], "known_affected": [ "Ubuntu-18:gnutls-bin-0:3.5.18-1ubuntu1.6+tuxcare.els1.amd64", 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"Ubuntu-18:libgnutls28-dev-0:3.5.18-1ubuntu1.6+tuxcare.els1.amd64", "Ubuntu-18:libgnutls28-dev-0:3.5.18-1ubuntu1.6+tuxcare.els2.amd64", "Ubuntu-18:libgnutls28-dev-0:3.5.18-1ubuntu1.6+tuxcare.els3.amd64", "Ubuntu-18:libgnutls28-dev-0:3.5.18-1ubuntu1.6+tuxcare.els4.amd64", "Ubuntu-18:libgnutls30-0:3.5.18-1ubuntu1.6+tuxcare.els1.amd64", "Ubuntu-18:libgnutls30-0:3.5.18-1ubuntu1.6+tuxcare.els2.amd64", "Ubuntu-18:libgnutls30-0:3.5.18-1ubuntu1.6+tuxcare.els3.amd64", "Ubuntu-18:libgnutls30-0:3.5.18-1ubuntu1.6+tuxcare.els4.amd64", "Ubuntu-18:libgnutlsxx28-0:3.5.18-1ubuntu1.6+tuxcare.els1.amd64", "Ubuntu-18:libgnutlsxx28-0:3.5.18-1ubuntu1.6+tuxcare.els2.amd64", "Ubuntu-18:libgnutlsxx28-0:3.5.18-1ubuntu1.6+tuxcare.els3.amd64", "Ubuntu-18:libgnutlsxx28-0:3.5.18-1ubuntu1.6+tuxcare.els4.amd64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2026-42015" }, { "category": "external", "summary": "https://access.redhat.com/security/cve/CVE-2026-42015", "url": "https://access.redhat.com/security/cve/CVE-2026-42015" }, { "category": "external", "summary": "https://bugzilla.redhat.com/show_bug.cgi?id=2467678", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467678" } ], "release_date": "2026-05-26T22:16:00Z", "remediations": [ { "category": "vendor_fix", "date": "2026-07-17T06:08:47.595248Z", "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els/releases/CLSA-2026:1784268522", "product_ids": [ "Ubuntu-18:gnutls-bin-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:gnutls-doc-0:3.5.18-1ubuntu1.6+tuxcare.els5.all", "Ubuntu-18:libgnutls-dane0-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls-openssl27-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls28-dev-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutls30-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64", "Ubuntu-18:libgnutlsxx28-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64" ], "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1784268522" }, { "category": "none_available", "date": "2026-05-26T22:16:00Z", "details": "Affected", "product_ids": [ "Ubuntu-18:gnutls-bin-0:3.5.18-1ubuntu1.6+tuxcare.els1.amd64", "Ubuntu-18:gnutls-bin-0:3.5.18-1ubuntu1.6+tuxcare.els2.amd64", "Ubuntu-18:gnutls-bin-0:3.5.18-1ubuntu1.6+tuxcare.els3.amd64", "Ubuntu-18:gnutls-bin-0:3.5.18-1ubuntu1.6+tuxcare.els4.amd64", "Ubuntu-18:gnutls-doc-0:3.5.18-1ubuntu1.6+tuxcare.els1.all", "Ubuntu-18:gnutls-doc-0:3.5.18-1ubuntu1.6+tuxcare.els2.all", "Ubuntu-18:gnutls-doc-0:3.5.18-1ubuntu1.6+tuxcare.els3.all", "Ubuntu-18:gnutls-doc-0:3.5.18-1ubuntu1.6+tuxcare.els4.all", "Ubuntu-18:libgnutls-dane0-0:3.5.18-1ubuntu1.6+tuxcare.els1.amd64", "Ubuntu-18:libgnutls-dane0-0:3.5.18-1ubuntu1.6+tuxcare.els2.amd64", "Ubuntu-18:libgnutls-dane0-0:3.5.18-1ubuntu1.6+tuxcare.els3.amd64", 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"Ubuntu-18:libgnutlsxx28-0:3.5.18-1ubuntu1.6+tuxcare.els5.amd64" ] } ], "threats": [ { "category": "impact", "details": "Moderate" } ] } ] }