{ "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": "3.4.0.tuxcare.els2-r0:\n - CVE-2026-29518", "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-2026:1779496236", "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1779496236" }, { "category": "self", "summary": "Canonical URL", "url": "https://security.tuxcare.com/csaf/v2/els_os/alpinelinux3.18els/advisories/2026/clsa-2026_1779496236.json" } ], "tracking": { "current_release_date": "2026-07-01T12:00:41Z", "generator": { "date": "2026-07-01T12:00:41Z", "engine": { "name": "pyCSAF" } }, "id": "CLSA-2026:1779496236", "initial_release_date": "2026-05-23T00:31:24Z", "revision_history": [ { "date": "2026-05-23T00:31:24Z", "number": "1", "summary": "Initial version" }, { "date": "2026-06-23T00:45:37Z", "number": "2", "summary": "Update document" }, { "date": "2026-07-01T12:00:41Z", "number": "3", "summary": "Update document" } ], "status": "final", "version": "3" }, "title": "rsync: Fix of CVE-2026-29518" }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Alpine Linux 3.18", "product": { "name": "Alpine Linux 3.18", "product_id": "Alpine-Linux-3.18", "product_identification_helper": { "cpe": "cpe:2.3:o:alpinelinux:alpine_linux:3.18:*:*:*:*:*:*:*" } } } ], "category": "product_family", "name": "Alpine Linux" } ], "category": "vendor", "name": "Alpine Linux" }, { "branches": [ { "branches": [ { "category": "product_version", "name": "rrsync-3.4.0.tuxcare.els2-r0.aarch64", "product": { "name": "rrsync-3.4.0.tuxcare.els2-r0.aarch64", "product_id": "rrsync-3.4.0.tuxcare.els2-r0.aarch64", "product_identification_helper": { "purl": "pkg:apk/tuxcare/rrsync@3.4.0.tuxcare.els2-r0?arch=aarch64" } } }, { "category": "product_version", "name": "rsync-doc-3.4.0.tuxcare.els2-r0.aarch64", "product": { "name": "rsync-doc-3.4.0.tuxcare.els2-r0.aarch64", "product_id": "rsync-doc-3.4.0.tuxcare.els2-r0.aarch64", "product_identification_helper": { "purl": "pkg:apk/tuxcare/rsync-doc@3.4.0.tuxcare.els2-r0?arch=aarch64" } } }, { "category": "product_version", "name": "rsync-openrc-3.4.0.tuxcare.els2-r0.aarch64", "product": { "name": "rsync-openrc-3.4.0.tuxcare.els2-r0.aarch64", "product_id": "rsync-openrc-3.4.0.tuxcare.els2-r0.aarch64", "product_identification_helper": { "purl": "pkg:apk/tuxcare/rsync-openrc@3.4.0.tuxcare.els2-r0?arch=aarch64" } } }, { "category": "product_version", "name": "rsync-3.4.0.tuxcare.els2-r0.aarch64", "product": { "name": "rsync-3.4.0.tuxcare.els2-r0.aarch64", "product_id": "rsync-3.4.0.tuxcare.els2-r0.aarch64", "product_identification_helper": { "purl": "pkg:apk/tuxcare/rsync@3.4.0.tuxcare.els2-r0?arch=aarch64" } } } ], "category": "architecture", "name": "aarch64" }, { "branches": [ { "category": "product_version", "name": "rrsync-3.4.0.tuxcare.els2-r0.x86_64", "product": { "name": "rrsync-3.4.0.tuxcare.els2-r0.x86_64", "product_id": "rrsync-3.4.0.tuxcare.els2-r0.x86_64", "product_identification_helper": { "purl": "pkg:apk/tuxcare/rrsync@3.4.0.tuxcare.els2-r0?arch=x86_64" } } }, { "category": "product_version", "name": "rsync-doc-3.4.0.tuxcare.els2-r0.x86_64", "product": { "name": "rsync-doc-3.4.0.tuxcare.els2-r0.x86_64", "product_id": "rsync-doc-3.4.0.tuxcare.els2-r0.x86_64", "product_identification_helper": { "purl": "pkg:apk/tuxcare/rsync-doc@3.4.0.tuxcare.els2-r0?arch=x86_64" } } }, { "category": "product_version", "name": "rsync-openrc-3.4.0.tuxcare.els2-r0.x86_64", "product": { "name": "rsync-openrc-3.4.0.tuxcare.els2-r0.x86_64", "product_id": "rsync-openrc-3.4.0.tuxcare.els2-r0.x86_64", "product_identification_helper": { "purl": "pkg:apk/tuxcare/rsync-openrc@3.4.0.tuxcare.els2-r0?arch=x86_64" } } }, { "category": "product_version", "name": "rsync-3.4.0.tuxcare.els2-r0.x86_64", "product": { "name": "rsync-3.4.0.tuxcare.els2-r0.x86_64", "product_id": "rsync-3.4.0.tuxcare.els2-r0.x86_64", "product_identification_helper": { "purl": "pkg:apk/tuxcare/rsync@3.4.0.tuxcare.els2-r0?arch=x86_64" } } } ], "category": "architecture", "name": "x86_64" } ], "category": "vendor", "name": "TuxCare" } ], "relationships": [ { "category": "default_component_of", "full_product_name": { "name": "rrsync-3.4.0.tuxcare.els2-r0.aarch64 as a component of Alpine Linux 3.18", "product_id": "Alpine-Linux-3.18:rrsync-3.4.0.tuxcare.els2-r0.aarch64" }, "product_reference": "rrsync-3.4.0.tuxcare.els2-r0.aarch64", "relates_to_product_reference": "Alpine-Linux-3.18" }, { "category": "default_component_of", "full_product_name": { "name": "rrsync-3.4.0.tuxcare.els2-r0.x86_64 as a component of Alpine Linux 3.18", "product_id": "Alpine-Linux-3.18:rrsync-3.4.0.tuxcare.els2-r0.x86_64" }, "product_reference": "rrsync-3.4.0.tuxcare.els2-r0.x86_64", "relates_to_product_reference": "Alpine-Linux-3.18" }, { "category": "default_component_of", "full_product_name": { "name": "rsync-doc-3.4.0.tuxcare.els2-r0.x86_64 as a component of Alpine Linux 3.18", "product_id": "Alpine-Linux-3.18:rsync-doc-3.4.0.tuxcare.els2-r0.x86_64" }, "product_reference": "rsync-doc-3.4.0.tuxcare.els2-r0.x86_64", "relates_to_product_reference": "Alpine-Linux-3.18" }, { "category": "default_component_of", "full_product_name": { "name": "rsync-doc-3.4.0.tuxcare.els2-r0.aarch64 as a component of Alpine Linux 3.18", "product_id": "Alpine-Linux-3.18:rsync-doc-3.4.0.tuxcare.els2-r0.aarch64" }, "product_reference": "rsync-doc-3.4.0.tuxcare.els2-r0.aarch64", "relates_to_product_reference": "Alpine-Linux-3.18" }, { "category": "default_component_of", "full_product_name": { "name": "rsync-openrc-3.4.0.tuxcare.els2-r0.aarch64 as a component of Alpine Linux 3.18", "product_id": "Alpine-Linux-3.18:rsync-openrc-3.4.0.tuxcare.els2-r0.aarch64" }, "product_reference": "rsync-openrc-3.4.0.tuxcare.els2-r0.aarch64", "relates_to_product_reference": "Alpine-Linux-3.18" }, { "category": "default_component_of", "full_product_name": { "name": "rsync-openrc-3.4.0.tuxcare.els2-r0.x86_64 as a component of Alpine Linux 3.18", "product_id": "Alpine-Linux-3.18:rsync-openrc-3.4.0.tuxcare.els2-r0.x86_64" }, "product_reference": "rsync-openrc-3.4.0.tuxcare.els2-r0.x86_64", "relates_to_product_reference": "Alpine-Linux-3.18" }, { "category": "default_component_of", "full_product_name": { "name": "rsync-3.4.0.tuxcare.els2-r0.aarch64 as a component of Alpine Linux 3.18", "product_id": "Alpine-Linux-3.18:rsync-3.4.0.tuxcare.els2-r0.aarch64" }, "product_reference": "rsync-3.4.0.tuxcare.els2-r0.aarch64", "relates_to_product_reference": "Alpine-Linux-3.18" }, { "category": "default_component_of", "full_product_name": { "name": "rsync-3.4.0.tuxcare.els2-r0.x86_64 as a component of Alpine Linux 3.18", "product_id": "Alpine-Linux-3.18:rsync-3.4.0.tuxcare.els2-r0.x86_64" }, "product_reference": "rsync-3.4.0.tuxcare.els2-r0.x86_64", "relates_to_product_reference": "Alpine-Linux-3.18" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-29518", "cwe": { "id": "CWE-367", "name": "Time-of-check Time-of-use (TOCTOU) Race Condition" }, "notes": [ { "category": "description", "text": "Rsync versions before 3.4.3 contain a time-of-check to time-of-use (TOCTOU) race condition in daemon file handling that allows attackers to redirect file writes outside intended directories by replacing parent directory components with symbolic links. Attackers with write access to a module path can exploit this race condition to create or overwrite arbitrary files, potentially modifying sensitive system files and achieving privilege escalation when the daemon runs with elevated privileges. This vulnerability can only be triggered if the chroot setting is false.", "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": [ "Alpine-Linux-3.18:rrsync-3.4.0.tuxcare.els2-r0.aarch64", "Alpine-Linux-3.18:rrsync-3.4.0.tuxcare.els2-r0.x86_64", "Alpine-Linux-3.18:rsync-3.4.0.tuxcare.els2-r0.aarch64", "Alpine-Linux-3.18:rsync-3.4.0.tuxcare.els2-r0.x86_64", "Alpine-Linux-3.18:rsync-doc-3.4.0.tuxcare.els2-r0.aarch64", "Alpine-Linux-3.18:rsync-doc-3.4.0.tuxcare.els2-r0.x86_64", "Alpine-Linux-3.18:rsync-openrc-3.4.0.tuxcare.els2-r0.aarch64", "Alpine-Linux-3.18:rsync-openrc-3.4.0.tuxcare.els2-r0.x86_64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2026-29518" }, { "category": "external", "summary": "https://github.com/RsyncProject/rsync/pull/895/changes/8471fdd1561049ef5f58df44a1811a50bd9a531d", "url": "https://github.com/RsyncProject/rsync/pull/895/changes/8471fdd1561049ef5f58df44a1811a50bd9a531d" }, { "category": "external", "summary": "https://github.com/RsyncProject/rsync/releases/tag/v3.4.3", "url": "https://github.com/RsyncProject/rsync/releases/tag/v3.4.3" }, { "category": "external", "summary": "https://michael.stapelberg.ch/posts/2026-05-24-minimal-memory-safe-go-rsync-vulns/", "url": "https://michael.stapelberg.ch/posts/2026-05-24-minimal-memory-safe-go-rsync-vulns/" }, { "category": "external", "summary": "https://www.vulncheck.com/advisories/rsync-toctou-race-condition-allows-symlink-based-arbitrary-file-write", "url": "https://www.vulncheck.com/advisories/rsync-toctou-race-condition-allows-symlink-based-arbitrary-file-write" }, { "category": "external", "summary": "https://access.redhat.com/errata/RHSA-2026:26332", "url": "https://access.redhat.com/errata/RHSA-2026:26332" }, { "category": "external", "summary": "https://access.redhat.com/errata/RHSA-2026:26408", "url": "https://access.redhat.com/errata/RHSA-2026:26408" }, { "category": "external", "summary": "https://access.redhat.com/errata/RHSA-2026:26410", "url": "https://access.redhat.com/errata/RHSA-2026:26410" }, { "category": "external", "summary": "https://access.redhat.com/errata/RHSA-2026:29197", "url": "https://access.redhat.com/errata/RHSA-2026:29197" }, { "category": "external", "summary": "https://access.redhat.com/security/cve/CVE-2026-29518", "url": "https://access.redhat.com/security/cve/CVE-2026-29518" }, { "category": "external", "summary": "https://bugzilla.redhat.com/show_bug.cgi?id=2469055", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2469055" }, { "category": "external", "summary": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-29518.json", "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-29518.json" } ], "release_date": "2026-05-20T13:16:00Z", "remediations": [ { "category": "vendor_fix", "date": "2026-05-23T00:30:39.161501Z", "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els/releases/CLSA-2026:1779496236", "product_ids": [ "Alpine-Linux-3.18:rrsync-3.4.0.tuxcare.els2-r0.aarch64", "Alpine-Linux-3.18:rrsync-3.4.0.tuxcare.els2-r0.x86_64", "Alpine-Linux-3.18:rsync-3.4.0.tuxcare.els2-r0.aarch64", "Alpine-Linux-3.18:rsync-3.4.0.tuxcare.els2-r0.x86_64", "Alpine-Linux-3.18:rsync-doc-3.4.0.tuxcare.els2-r0.aarch64", "Alpine-Linux-3.18:rsync-doc-3.4.0.tuxcare.els2-r0.x86_64", "Alpine-Linux-3.18:rsync-openrc-3.4.0.tuxcare.els2-r0.aarch64", "Alpine-Linux-3.18:rsync-openrc-3.4.0.tuxcare.els2-r0.x86_64" ], "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1779496236" } ], "scores": [ { "cvss_v3": { "attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" }, "products": [ "Alpine-Linux-3.18:rrsync-3.4.0.tuxcare.els2-r0.aarch64", "Alpine-Linux-3.18:rrsync-3.4.0.tuxcare.els2-r0.x86_64", "Alpine-Linux-3.18:rsync-3.4.0.tuxcare.els2-r0.aarch64", "Alpine-Linux-3.18:rsync-3.4.0.tuxcare.els2-r0.x86_64", "Alpine-Linux-3.18:rsync-doc-3.4.0.tuxcare.els2-r0.aarch64", "Alpine-Linux-3.18:rsync-doc-3.4.0.tuxcare.els2-r0.x86_64", "Alpine-Linux-3.18:rsync-openrc-3.4.0.tuxcare.els2-r0.aarch64", "Alpine-Linux-3.18:rsync-openrc-3.4.0.tuxcare.els2-r0.x86_64" ] } ], "threats": [ { "category": "impact", "details": "Important" } ] }, { "cve": "CVE-2026-43618", "cwe": { "id": "CWE-125", "name": "Out-of-bounds Read" }, "notes": [ { "category": "description", "text": "Rsync version 3.4.2 and prior contain an integer overflow vulnerability in the compressed-token decoder where a 32-bit signed counter is not checked for overflow, allowing a malicious sender to trigger an overflow that causes the receiver process to read and return data from outside the intended buffer bounds. Attackers can exploit this vulnerability to disclose process memory contents including environment variables, passwords, heap and stack data, and library memory pointers, significantly reducing ASLR effectiveness and facilitating further exploitation.", "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": [ "Alpine-Linux-3.18:rrsync-3.4.0.tuxcare.els2-r0.aarch64", "Alpine-Linux-3.18:rrsync-3.4.0.tuxcare.els2-r0.x86_64", "Alpine-Linux-3.18:rsync-3.4.0.tuxcare.els2-r0.aarch64", "Alpine-Linux-3.18:rsync-3.4.0.tuxcare.els2-r0.x86_64", "Alpine-Linux-3.18:rsync-doc-3.4.0.tuxcare.els2-r0.aarch64", "Alpine-Linux-3.18:rsync-doc-3.4.0.tuxcare.els2-r0.x86_64", "Alpine-Linux-3.18:rsync-openrc-3.4.0.tuxcare.els2-r0.aarch64", "Alpine-Linux-3.18:rsync-openrc-3.4.0.tuxcare.els2-r0.x86_64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2026-43618" }, { "category": "external", "summary": "https://github.com/RsyncProject/rsync/releases/tag/v3.4.3", "url": "https://github.com/RsyncProject/rsync/releases/tag/v3.4.3" }, { "category": "external", "summary": "https://github.com/RsyncProject/rsync/security/advisories/GHSA-g37v-g3gj-pmwq", "url": "https://github.com/RsyncProject/rsync/security/advisories/GHSA-g37v-g3gj-pmwq" }, { "category": "external", "summary": "https://www.vulncheck.com/advisories/rsync-integer-overflow-information-disclosure", "url": "https://www.vulncheck.com/advisories/rsync-integer-overflow-information-disclosure" }, { "category": "external", "summary": "https://access.redhat.com/errata/RHSA-2026:26332", "url": "https://access.redhat.com/errata/RHSA-2026:26332" }, { "category": "external", "summary": "https://access.redhat.com/errata/RHSA-2026:26408", "url": "https://access.redhat.com/errata/RHSA-2026:26408" }, { "category": "external", "summary": "https://access.redhat.com/errata/RHSA-2026:26410", "url": "https://access.redhat.com/errata/RHSA-2026:26410" }, { "category": "external", "summary": "https://access.redhat.com/errata/RHSA-2026:29197", "url": "https://access.redhat.com/errata/RHSA-2026:29197" }, { "category": "external", "summary": "https://access.redhat.com/security/cve/CVE-2026-43618", "url": "https://access.redhat.com/security/cve/CVE-2026-43618" }, { "category": "external", "summary": "https://bugzilla.redhat.com/show_bug.cgi?id=2469054", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2469054" }, { "category": "external", "summary": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43618.json", "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43618.json" } ], "release_date": "2026-05-20T02:16:00Z", "remediations": [ { "category": "vendor_fix", "date": "2026-05-23T00:30:39.161501Z", "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els/releases/CLSA-2026:1779496236", "product_ids": [ "Alpine-Linux-3.18:rrsync-3.4.0.tuxcare.els2-r0.aarch64", "Alpine-Linux-3.18:rrsync-3.4.0.tuxcare.els2-r0.x86_64", "Alpine-Linux-3.18:rsync-3.4.0.tuxcare.els2-r0.aarch64", "Alpine-Linux-3.18:rsync-3.4.0.tuxcare.els2-r0.x86_64", "Alpine-Linux-3.18:rsync-doc-3.4.0.tuxcare.els2-r0.aarch64", "Alpine-Linux-3.18:rsync-doc-3.4.0.tuxcare.els2-r0.x86_64", "Alpine-Linux-3.18:rsync-openrc-3.4.0.tuxcare.els2-r0.aarch64", "Alpine-Linux-3.18:rsync-openrc-3.4.0.tuxcare.els2-r0.x86_64" ], "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1779496236" } ], "scores": [ { "cvss_v3": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1" }, "products": [ "Alpine-Linux-3.18:rrsync-3.4.0.tuxcare.els2-r0.aarch64", "Alpine-Linux-3.18:rrsync-3.4.0.tuxcare.els2-r0.x86_64", "Alpine-Linux-3.18:rsync-3.4.0.tuxcare.els2-r0.aarch64", "Alpine-Linux-3.18:rsync-3.4.0.tuxcare.els2-r0.x86_64", "Alpine-Linux-3.18:rsync-doc-3.4.0.tuxcare.els2-r0.aarch64", "Alpine-Linux-3.18:rsync-doc-3.4.0.tuxcare.els2-r0.x86_64", "Alpine-Linux-3.18:rsync-openrc-3.4.0.tuxcare.els2-r0.aarch64", "Alpine-Linux-3.18:rsync-openrc-3.4.0.tuxcare.els2-r0.x86_64" ] } ], "threats": [ { "category": "impact", "details": "Important" } ] } ] }