{ "document": { "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/almalinux9.2esu/vex/2026/cve-2026-18477-els_os-almalinux9_2esu.json" } ], "tracking": { "current_release_date": "2026-08-14T14:39:20Z", "generator": { "date": "2026-08-14T14:39:20Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2026-18477-ELS_OS-ALMALINUX9.2ESU", "initial_release_date": "2026-08-03T17:16:00Z", "revision_history": [ { "date": "2026-08-03T17:16:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-08-14T14:39:20Z", "number": "2", "summary": "Official Publication" } ], "status": "final", "version": "2" }, "title": "Security update on CVE-2026-18477" }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "AlmaLinux 9.2", "product": { "name": "AlmaLinux 9.2", "product_id": "AlmaLinux-9.2", "product_identification_helper": { "cpe": "cpe:2.3:o:almalinux:almalinux:9.2:*:*:*:*:*:*:*" } } } ], "category": "product_family", "name": "AlmaLinux" } ], "category": "vendor", "name": "AlmaLinux OS Foundation" }, { "branches": [ { "branches": [ { "category": "product_version", "name": "tar-2:1.34-7.el9.tuxcare.els2.x86_64", "product": { "name": "tar-2:1.34-7.el9.tuxcare.els2.x86_64", "product_id": "tar-2:1.34-7.el9.tuxcare.els2.x86_64", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/tar@1.34-7.el9.tuxcare.els2?arch=x86_64&epoch=2" } } }, { "category": "product_version", "name": "tar-2:1.34-7.el9.tuxcare.els1.x86_64", "product": { "name": "tar-2:1.34-7.el9.tuxcare.els1.x86_64", "product_id": "tar-2:1.34-7.el9.tuxcare.els1.x86_64", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/tar@1.34-7.el9.tuxcare.els1?arch=x86_64&epoch=2" } } }, { "category": "product_version", "name": "tar-2:1.34-7.el9.tuxcare.els3.x86_64", "product": { "name": "tar-2:1.34-7.el9.tuxcare.els3.x86_64", "product_id": "tar-2:1.34-7.el9.tuxcare.els3.x86_64", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/tar@1.34-7.el9.tuxcare.els3?arch=x86_64&epoch=2" } } } ], "category": "architecture", "name": "x86_64" } ], "category": "vendor", "name": "TuxCare" } ], "relationships": [ { "category": "default_component_of", "full_product_name": { "name": "tar-2:1.34-7.el9.tuxcare.els2.x86_64 as a component of AlmaLinux 9.2", "product_id": "AlmaLinux-9.2:tar-2:1.34-7.el9.tuxcare.els2.x86_64" }, "product_reference": "tar-2:1.34-7.el9.tuxcare.els2.x86_64", "relates_to_product_reference": "AlmaLinux-9.2" }, { "category": "default_component_of", "full_product_name": { "name": "tar-2:1.34-7.el9.tuxcare.els1.x86_64 as a component of AlmaLinux 9.2", "product_id": "AlmaLinux-9.2:tar-2:1.34-7.el9.tuxcare.els1.x86_64" }, "product_reference": "tar-2:1.34-7.el9.tuxcare.els1.x86_64", "relates_to_product_reference": "AlmaLinux-9.2" }, { "category": "default_component_of", "full_product_name": { "name": "tar-2:1.34-7.el9.tuxcare.els3.x86_64 as a component of AlmaLinux 9.2", "product_id": "AlmaLinux-9.2:tar-2:1.34-7.el9.tuxcare.els3.x86_64" }, "product_reference": "tar-2:1.34-7.el9.tuxcare.els3.x86_64", "relates_to_product_reference": "AlmaLinux-9.2" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-18477", "cwe": { "id": "CWE-367", "name": "Time-of-check Time-of-use (TOCTOU) Race Condition" }, "notes": [ { "category": "description", "text": "A TOCTOU (Time-of-Check Time-of-Use) vulnerability in GNU tar's incremental dumpdir 'X' rename handling allows a local attacker with write access to a directory being backed up to influence the restore process if the attacker has access to the system where the restore is being performed. During restoration, files or directories may be created, renamed or overwritten outside the intended extraction directory. This could lead to unauthorized file modification or, in some cases, privilege escalation. Exploitation does not require the attacker to modify or craft the archive, and standard backup and restore workflows—including extracting into a newly created directory without using the -P option do not mitigate the issue.", "title": "Vulnerability description" } ], "product_status": { "under_investigation": [ "AlmaLinux-9.2:tar-2:1.34-7.el9.tuxcare.els1.x86_64", "AlmaLinux-9.2:tar-2:1.34-7.el9.tuxcare.els2.x86_64", "AlmaLinux-9.2:tar-2:1.34-7.el9.tuxcare.els3.x86_64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2026-18477" }, { "category": "external", "summary": "https://access.redhat.com/errata/RHSA-2026:49361", "url": "https://access.redhat.com/errata/RHSA-2026:49361" }, { "category": "external", "summary": "https://access.redhat.com/security/cve/CVE-2026-18477", "url": "https://access.redhat.com/security/cve/CVE-2026-18477" }, { "category": "external", "summary": "https://bugzilla.redhat.com/show_bug.cgi?id=2509735", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2509735" } ], "release_date": "2026-08-03T17:16:00Z", "remediations": [ { "category": "none_available", "date": "2026-08-14T12:26:08.465365Z", "details": "Affected", "product_ids": [ "AlmaLinux-9.2:tar-2:1.34-7.el9.tuxcare.els1.x86_64", "AlmaLinux-9.2:tar-2:1.34-7.el9.tuxcare.els2.x86_64", "AlmaLinux-9.2:tar-2:1.34-7.el9.tuxcare.els3.x86_64" ] } ] } ] }