{ "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/debian10els/vex/2026/cve-2026-53803-els_os-debian10els.json" } ], "tracking": { "current_release_date": "2026-08-27T16:40:09Z", "generator": { "date": "2026-08-27T16:40:09Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2026-53803-ELS_OS-DEBIAN10ELS", "initial_release_date": "2026-08-13T15:19:00Z", "revision_history": [ { "date": "2026-08-13T15:19:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-08-16T14:47:40Z", "number": "2", "summary": "Official Publication" }, { "date": "2026-08-27T16:40:09Z", "number": "3", "summary": "Update document" } ], "status": "final", "version": "3" }, "title": "Security update on CVE-2026-53803" }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Debian 10", "product": { "name": "Debian 10", "product_id": "Debian-10", "product_identification_helper": { "cpe": "cpe:2.3:o:debian:debian_linux:10:*:*:*:*:*:*:*" } } } ], "category": "product_family", "name": "Debian" }, { "branches": [ { "category": "product_version", "name": "rsync-0:3.1.3-6.amd64", "product": { "name": "rsync-0:3.1.3-6.amd64", "product_id": "rsync-0:3.1.3-6.amd64", "product_identification_helper": { "purl": "pkg:deb/debian/rsync@3.1.3-6?arch=amd64" } } } ], "category": "architecture", "name": "amd64" } ], "category": "vendor", "name": "Software in the Public Interest, Inc." }, { "branches": [ { "branches": [ { "category": "product_version", "name": "rsync-0:3.1.3-6+tuxcare.els4.amd64", "product": { "name": "rsync-0:3.1.3-6+tuxcare.els4.amd64", "product_id": "rsync-0:3.1.3-6+tuxcare.els4.amd64", "product_identification_helper": { "purl": "pkg:deb/tuxcare/rsync@3.1.3-6%2Btuxcare.els4?arch=amd64" } } }, { "category": "product_version", "name": "rsync-0:3.1.3-6+tuxcare.els3.amd64", "product": { "name": "rsync-0:3.1.3-6+tuxcare.els3.amd64", "product_id": "rsync-0:3.1.3-6+tuxcare.els3.amd64", "product_identification_helper": { "purl": "pkg:deb/tuxcare/rsync@3.1.3-6%2Btuxcare.els3?arch=amd64" } } }, { "category": "product_version", "name": "rsync-0:3.1.3-6+tuxcare.els1.amd64", "product": { "name": "rsync-0:3.1.3-6+tuxcare.els1.amd64", "product_id": "rsync-0:3.1.3-6+tuxcare.els1.amd64", "product_identification_helper": { "purl": "pkg:deb/tuxcare/rsync@3.1.3-6%2Btuxcare.els1?arch=amd64" } } }, { "category": "product_version", "name": "rsync-0:3.1.3-6+tuxcare.els2.amd64", "product": { "name": "rsync-0:3.1.3-6+tuxcare.els2.amd64", "product_id": "rsync-0:3.1.3-6+tuxcare.els2.amd64", "product_identification_helper": { "purl": "pkg:deb/tuxcare/rsync@3.1.3-6%2Btuxcare.els2?arch=amd64" } } } ], "category": "architecture", "name": "amd64" } ], "category": "vendor", "name": "TuxCare" } ], "relationships": [ { "category": "default_component_of", "full_product_name": { "name": "rsync-0:3.1.3-6+tuxcare.els4.amd64 as a component of Debian 10", "product_id": "Debian-10:rsync-0:3.1.3-6+tuxcare.els4.amd64" }, "product_reference": "rsync-0:3.1.3-6+tuxcare.els4.amd64", "relates_to_product_reference": "Debian-10" }, { "category": "default_component_of", "full_product_name": { "name": "rsync-0:3.1.3-6+tuxcare.els3.amd64 as a component of Debian 10", "product_id": "Debian-10:rsync-0:3.1.3-6+tuxcare.els3.amd64" }, "product_reference": "rsync-0:3.1.3-6+tuxcare.els3.amd64", "relates_to_product_reference": "Debian-10" }, { "category": "default_component_of", "full_product_name": { "name": "rsync-0:3.1.3-6+tuxcare.els1.amd64 as a component of Debian 10", "product_id": "Debian-10:rsync-0:3.1.3-6+tuxcare.els1.amd64" }, "product_reference": "rsync-0:3.1.3-6+tuxcare.els1.amd64", "relates_to_product_reference": "Debian-10" }, { "category": "default_component_of", "full_product_name": { "name": "rsync-0:3.1.3-6+tuxcare.els2.amd64 as a component of Debian 10", "product_id": "Debian-10:rsync-0:3.1.3-6+tuxcare.els2.amd64" }, "product_reference": "rsync-0:3.1.3-6+tuxcare.els2.amd64", "relates_to_product_reference": "Debian-10" }, { "category": "default_component_of", "full_product_name": { "name": "rsync-0:3.1.3-6.amd64 as a component of Debian 10", "product_id": "Debian-10:rsync-0:3.1.3-6.amd64" }, "product_reference": "rsync-0:3.1.3-6.amd64", "relates_to_product_reference": "Debian-10" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-53803", "cwe": { "id": "CWE-59", "name": "Improper Link Resolution Before File Access ('Link Following')" }, "notes": [ { "category": "description", "text": "rsync before 3.5.0 contains a symlink following vulnerability that allows local attackers to overwrite arbitrary files by placing a symlink at a predictable output path such as --log-file, --write-batch, or daemon-mode log and statistics paths. Attackers can exploit rsync's failure to reject symlinks during ancillary file writes to redirect output to arbitrary filesystem locations, achieving local privilege escalation on installations where rsync runs with elevated privileges such as setuid or privileged daemon configurations.", "title": "Vulnerability description" } ], "product_status": { "known_affected": [ "Debian-10:rsync-0:3.1.3-6+tuxcare.els1.amd64", "Debian-10:rsync-0:3.1.3-6+tuxcare.els2.amd64", "Debian-10:rsync-0:3.1.3-6+tuxcare.els3.amd64", "Debian-10:rsync-0:3.1.3-6+tuxcare.els4.amd64", "Debian-10:rsync-0:3.1.3-6.amd64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2026-53803" }, { "category": "external", "summary": "https://github.com/RsyncProject/rsync/releases/tag/v3.5.0", "url": "https://github.com/RsyncProject/rsync/releases/tag/v3.5.0" }, { "category": "external", "summary": "https://github.com/RsyncProject/rsync/security/advisories/GHSA-g9f4-7q66-9582", "url": "https://github.com/RsyncProject/rsync/security/advisories/GHSA-g9f4-7q66-9582" }, { "category": "external", "summary": "https://www.vulncheck.com/advisories/rsync-symlink-following-arbitrary-file-overwrite", "url": "https://www.vulncheck.com/advisories/rsync-symlink-following-arbitrary-file-overwrite" } ], "release_date": "2026-08-13T15:19:00Z", "remediations": [ { "category": "no_fix_planned", "date": "2026-08-27T14:52:48.251503Z", "details": "We are not fixing this on this platform because there is no self-contained fix to take. Upstream addressed it by replacing the program's path handling wholesale in a later release and re-pointing every call site at it; importing that would rewrite every file-creation path in the sending and receiving code, the highest-risk area of the program. The flaw needs a local attacker who can plant a symlink at a predictable output path used by a privileged run — a log file, a batch file, or one of the daemon's own files — which redirects that write elsewhere. To stay safe, keep log files, batch files and the daemon configuration in root-owned directories that service accounts cannot write, and refuse the log-file, write-batch and read-batch options on daemon modules.", "product_ids": [ "Debian-10:rsync-0:3.1.3-6+tuxcare.els1.amd64", "Debian-10:rsync-0:3.1.3-6+tuxcare.els2.amd64", "Debian-10:rsync-0:3.1.3-6+tuxcare.els3.amd64", "Debian-10:rsync-0:3.1.3-6+tuxcare.els4.amd64", "Debian-10:rsync-0:3.1.3-6.amd64" ] } ] } ] }