{ "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/ubuntu18.04els/vex/2022/cve-2022-26635-els_os-ubuntu18_04els.json" } ], "tracking": { "current_release_date": "2026-06-13T09:37:50Z", "generator": { "date": "2026-06-13T09:37:50Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2022-26635-ELS_OS-UBUNTU18.04ELS", "initial_release_date": "2022-04-05T17:15:00Z", "revision_history": [ { "date": "2022-04-05T17:15:00Z", "number": "1", "summary": "Initial version" }, { "date": "2025-11-29T15:17:20Z", "number": "2", "summary": "Official Publication" }, { "date": "2025-12-23T22:15:38Z", "number": "3", "summary": "Update document" }, { "date": "2026-06-13T09:37:50Z", "number": "4", "summary": "Update document" } ], "status": "final", "version": "4" }, "title": "Security update on CVE-2022-26635" }, "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": "memcached-0:1.5.6-0ubuntu1.2+tuxcare.els1.amd64", "product": { "name": "memcached-0:1.5.6-0ubuntu1.2+tuxcare.els1.amd64", "product_id": "memcached-0:1.5.6-0ubuntu1.2+tuxcare.els1.amd64", "product_identification_helper": { "purl": "pkg:deb/cloudlinux/memcached@1.5.6-0ubuntu1.2%2Btuxcare.els1?arch=amd64" } } } ], "category": "architecture", "name": "amd64" } ], "category": "vendor", "name": "CloudLinux" } ], "relationships": [ { "category": "default_component_of", "full_product_name": { "name": "memcached-0:1.5.6-0ubuntu1.2+tuxcare.els1.amd64 as a component of Ubuntu 18.04", "product_id": "Ubuntu-18:memcached-0:1.5.6-0ubuntu1.2+tuxcare.els1.amd64" }, "product_reference": "memcached-0:1.5.6-0ubuntu1.2+tuxcare.els1.amd64", "relates_to_product_reference": "Ubuntu-18" } ] }, "vulnerabilities": [ { "cve": "CVE-2022-26635", "notes": [ { "category": "description", "text": "PHP-Memcached v2.2.0 and below contains an improper NULL termination which allows attackers to execute CLRF injection. Note: Third parties have disputed this as not affecting PHP-Memcached directly.", "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": [ "Ubuntu-18:memcached-0:1.5.6-0ubuntu1.2+tuxcare.els1.amd64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2022-26635" }, { "category": "external", "summary": "https://github.com/php-memcached-dev/php-memcached/issues/519", "url": "https://github.com/php-memcached-dev/php-memcached/issues/519" }, { "category": "external", "summary": "https://xhzeem.me/posts/Php5-memcached-Injection-Bypass/read/", "url": "https://xhzeem.me/posts/Php5-memcached-Injection-Bypass/read/" } ], "release_date": "2022-04-05T17:15:00Z", "scores": [ { "cvss_v2": { "accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0" }, "cvss_v3": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" }, "products": [ "Ubuntu-18:memcached-0:1.5.6-0ubuntu1.2+tuxcare.els1.amd64" ] } ], "threats": [ { "category": "impact", "details": "Critical" }, { "category": "impact", "date": "2026-06-12T12:54:35.736341Z", "details": "Not affected: This CVE targets the PHP Memcached client extension (php‑memcached ≤ 2.2.0) and is disputed by the extension’s maintainers as not a php‑memcached vulnerability; it does not apply to the memcached server. The component in scope here is memcached 1.5.6 (the server), which does not include the affected client‑side code path, so there is no exposure. Additionally, php‑memcached/libmemcached provide an optional VERIFY_KEY setting that rejects invalid keys (including CR/LF), underscoring that the reported behavior is a client‑side input‑validation concern rather than a server flaw.", "product_ids": [ "Ubuntu-18:memcached-0:1.5.6-0ubuntu1.2+tuxcare.els1.amd64" ] } ] } ] }