{ "document": { "aggregate_severity": { "text": "Medium" }, "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/ubuntu20.04els/vex/2026/cve-2026-33515-els_os-ubuntu20_04els.json" } ], "tracking": { "current_release_date": "2026-04-03T14:10:53Z", "generator": { "date": "2026-04-03T14:10:53Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2026-33515-ELS_OS-UBUNTU20.04ELS", "initial_release_date": "2026-03-26T01:16:00Z", "revision_history": [ { "date": "2026-03-26T01:16:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-04-03T14:10:53Z", "number": "2", "summary": "Official Publication" } ], "status": "final", "version": "2" }, "title": "Security update on CVE-2026-33515" }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Ubuntu 20.04", "product": { "name": "Ubuntu 20.04", "product_id": "Ubuntu-20", "product_identification_helper": { "cpe": "cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*" } } } ], "category": "product_family", "name": "Ubuntu" } ], "category": "vendor", "name": "Canonical Ltd." }, { "branches": [ { "branches": [ { "category": "product_version", "name": "squid-common-0:4.10-1ubuntu1.13+tuxcare.els1.all", "product": { "name": "squid-common-0:4.10-1ubuntu1.13+tuxcare.els1.all", "product_id": "squid-common-0:4.10-1ubuntu1.13+tuxcare.els1.all", "product_identification_helper": { "purl": "pkg:deb/tuxcare/squid-common@4.10-1ubuntu1.13%2Btuxcare.els1?arch=all" } } } ], "category": "architecture", "name": "all" }, { "branches": [ { "category": "product_version", "name": "squid-0:4.10-1ubuntu1.13+tuxcare.els1.amd64", "product": { "name": "squid-0:4.10-1ubuntu1.13+tuxcare.els1.amd64", "product_id": "squid-0:4.10-1ubuntu1.13+tuxcare.els1.amd64", "product_identification_helper": { "purl": "pkg:deb/tuxcare/squid@4.10-1ubuntu1.13%2Btuxcare.els1?arch=amd64" } } }, { "category": "product_version", "name": "squidclient-0:4.10-1ubuntu1.13+tuxcare.els1.amd64", "product": { "name": "squidclient-0:4.10-1ubuntu1.13+tuxcare.els1.amd64", "product_id": "squidclient-0:4.10-1ubuntu1.13+tuxcare.els1.amd64", "product_identification_helper": { "purl": "pkg:deb/tuxcare/squidclient@4.10-1ubuntu1.13%2Btuxcare.els1?arch=amd64" } } }, { "category": "product_version", "name": "squid-cgi-0:4.10-1ubuntu1.13+tuxcare.els1.amd64", "product": { "name": "squid-cgi-0:4.10-1ubuntu1.13+tuxcare.els1.amd64", "product_id": "squid-cgi-0:4.10-1ubuntu1.13+tuxcare.els1.amd64", "product_identification_helper": { "purl": "pkg:deb/tuxcare/squid-cgi@4.10-1ubuntu1.13%2Btuxcare.els1?arch=amd64" } } }, { "category": "product_version", "name": "squid-purge-0:4.10-1ubuntu1.13+tuxcare.els1.amd64", "product": { "name": "squid-purge-0:4.10-1ubuntu1.13+tuxcare.els1.amd64", "product_id": "squid-purge-0:4.10-1ubuntu1.13+tuxcare.els1.amd64", "product_identification_helper": { "purl": "pkg:deb/tuxcare/squid-purge@4.10-1ubuntu1.13%2Btuxcare.els1?arch=amd64" } } } ], "category": "architecture", "name": "amd64" } ], "category": "vendor", "name": "TuxCare" } ], "relationships": [ { "category": "default_component_of", "full_product_name": { "name": "squid-common-0:4.10-1ubuntu1.13+tuxcare.els1.all as a component of Ubuntu 20.04", "product_id": "Ubuntu-20:squid-common-0:4.10-1ubuntu1.13+tuxcare.els1.all" }, "product_reference": "squid-common-0:4.10-1ubuntu1.13+tuxcare.els1.all", "relates_to_product_reference": "Ubuntu-20" }, { "category": "default_component_of", "full_product_name": { "name": "squid-0:4.10-1ubuntu1.13+tuxcare.els1.amd64 as a component of Ubuntu 20.04", "product_id": "Ubuntu-20:squid-0:4.10-1ubuntu1.13+tuxcare.els1.amd64" }, "product_reference": "squid-0:4.10-1ubuntu1.13+tuxcare.els1.amd64", "relates_to_product_reference": "Ubuntu-20" }, { "category": "default_component_of", "full_product_name": { "name": "squidclient-0:4.10-1ubuntu1.13+tuxcare.els1.amd64 as a component of Ubuntu 20.04", "product_id": "Ubuntu-20:squidclient-0:4.10-1ubuntu1.13+tuxcare.els1.amd64" }, "product_reference": "squidclient-0:4.10-1ubuntu1.13+tuxcare.els1.amd64", "relates_to_product_reference": "Ubuntu-20" }, { "category": "default_component_of", "full_product_name": { "name": "squid-cgi-0:4.10-1ubuntu1.13+tuxcare.els1.amd64 as a component of Ubuntu 20.04", "product_id": "Ubuntu-20:squid-cgi-0:4.10-1ubuntu1.13+tuxcare.els1.amd64" }, "product_reference": "squid-cgi-0:4.10-1ubuntu1.13+tuxcare.els1.amd64", "relates_to_product_reference": "Ubuntu-20" }, { "category": "default_component_of", "full_product_name": { "name": "squid-purge-0:4.10-1ubuntu1.13+tuxcare.els1.amd64 as a component of Ubuntu 20.04", "product_id": "Ubuntu-20:squid-purge-0:4.10-1ubuntu1.13+tuxcare.els1.amd64" }, "product_reference": "squid-purge-0:4.10-1ubuntu1.13+tuxcare.els1.amd64", "relates_to_product_reference": "Ubuntu-20" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-33515", "cwe": { "id": "CWE-125", "name": "Out-of-bounds Read" }, "notes": [ { "category": "description", "text": "Squid is a caching proxy for the Web. Prior to version 7.5, due to improper input validation, Squid is vulnerable to out of bounds read when handling ICP traffic. This problem allows a remote attacker to receive small amounts of memory potentially containing sensitive information when responding with errors to invalid ICP requests. This attack is limited to Squid deployments that explicitly enable ICP support (i.e. configure non-zero `icp_port`). This problem cannot be mitigated by denying ICP queries using `icp_access` rules. Version 7.5 contains a patch.", "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": { "under_investigation": [ "Ubuntu-20:squid-0:4.10-1ubuntu1.13+tuxcare.els1.amd64", "Ubuntu-20:squid-cgi-0:4.10-1ubuntu1.13+tuxcare.els1.amd64", "Ubuntu-20:squid-common-0:4.10-1ubuntu1.13+tuxcare.els1.all", "Ubuntu-20:squid-purge-0:4.10-1ubuntu1.13+tuxcare.els1.amd64", "Ubuntu-20:squidclient-0:4.10-1ubuntu1.13+tuxcare.els1.amd64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2026-33515" }, { "category": "external", "summary": "https://github.com/squid-cache/squid/commit/8138e909d2058d4401e0ad49b583afaec912b165", "url": "https://github.com/squid-cache/squid/commit/8138e909d2058d4401e0ad49b583afaec912b165" }, { "category": "external", "summary": "https://github.com/squid-cache/squid/pull/2220", "url": "https://github.com/squid-cache/squid/pull/2220" }, { "category": "external", "summary": "https://github.com/squid-cache/squid/pull/2220#discussion_r2727683637", "url": "https://github.com/squid-cache/squid/pull/2220#discussion_r2727683637" }, { "category": "external", "summary": "https://github.com/squid-cache/squid/security/advisories/GHSA-84p4-hcx7-jj7c", "url": "https://github.com/squid-cache/squid/security/advisories/GHSA-84p4-hcx7-jj7c" }, { "category": "external", "summary": "http://www.openwall.com/lists/oss-security/2026/03/25/4", "url": "http://www.openwall.com/lists/oss-security/2026/03/25/4" } ], "release_date": "2026-03-26T01:16:00Z", "remediations": [ { "category": "none_available", "details": "Affected", "product_ids": [ "Ubuntu-20:squid-0:4.10-1ubuntu1.13+tuxcare.els1.amd64", "Ubuntu-20:squid-cgi-0:4.10-1ubuntu1.13+tuxcare.els1.amd64", "Ubuntu-20:squid-common-0:4.10-1ubuntu1.13+tuxcare.els1.all", "Ubuntu-20:squid-purge-0:4.10-1ubuntu1.13+tuxcare.els1.amd64", "Ubuntu-20:squidclient-0:4.10-1ubuntu1.13+tuxcare.els1.amd64" ] } ], "scores": [ { "cvss_v3": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "version": "3.1" }, "products": [ "Ubuntu-20:squid-0:4.10-1ubuntu1.13+tuxcare.els1.amd64", "Ubuntu-20:squid-cgi-0:4.10-1ubuntu1.13+tuxcare.els1.amd64", "Ubuntu-20:squid-common-0:4.10-1ubuntu1.13+tuxcare.els1.all", "Ubuntu-20:squid-purge-0:4.10-1ubuntu1.13+tuxcare.els1.amd64", "Ubuntu-20:squidclient-0:4.10-1ubuntu1.13+tuxcare.els1.amd64" ] } ], "threats": [ { "category": "impact", "details": "Moderate" } ] } ] }