CVE-2026-79775

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{"bugzilla": {"description": "github.com/diskfs/go-diskfs: rclone: Denial of Service via malicious SquashFS image parsing", "id": "2523581", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2523581"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-369", "details": ["rclone versions >= v1.72.0 and <= v1.74.4 (fixed in v1.75.0) contain multiple denial-of-service vulnerabilities in the archive backend's SquashFS parser, which relies on the github.com/diskfs/go-diskfs dependency. The parser fails to validate attacker-controlled superblock and metadata values before use. An attacker who can place or modify a SquashFS image in storage exposed through an rclone :archive: remote can craft a malicious image that triggers an integer division-by-zero panic (zero block size), an out-of-bounds slice panic (out-of-range inode metadata offset), or a non-progress CPU loop (truncated metadata stream). Variants 1 and 2 terminate the rclone process and, via 'rclone serve sftp', can crash the entire SFTP server; variant 3 causes sustained CPU consumption. Parsing is lazy, so a victim or remote client must address or descend into the malicious archive object to trigger it.", "A flaw was found in rclone. The archive backend's SquashFS parser fails to validate attacker-controlled superblock and metadata values before use. An attacker who can place or modify a malicious SquashFS image in storage exposed through an rclone :archive: remote can trigger multiple denial-of-service vulnerabilities. This can lead to an integer division-by-zero panic, an out-of-bounds slice panic, or a non-progress CPU loop, which can terminate the rclone process, potentially crash an SFTP server, or cause sustained CPU consumption."], "name": "CVE-2026-79775", "package_state": [{"cpe": "cpe:/a:redhat:assisted_installer:2", "fix_state": "Out of support scope", "package_name": "assisted/agent-preinstall-image-builder-rhel9", "product_name": "Assisted Installer for Red Hat OpenShift Container Platform 2"}, {"cpe": "cpe:/a:redhat:cryostat:4", "fix_state": "Fix deferred", "package_name": "cryostat/cryostat-storage-rhel9", "product_name": "Cryostat 4"}, {"cpe": "cpe:/a:redhat:exploit_intelligence:0", "fix_state": "Out of support scope", "package_name": "exploit-intelligence/agent-client-rhel9", "product_name": "Exploit Intelligence"}, {"cpe": "cpe:/a:redhat:exploit_intelligence:0", "fix_state": "Out of support scope", "package_name": "exploit-intelligence-tech-preview/agent-client-rhel9", 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Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift4/ose-agent-installer-api-server-rhel8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift4/ose-agent-installer-api-server-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift4/ose-baremetal-installer-rhel8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift4/ose-baremetal-installer-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift4/ose-image-customization-controller-rhel8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift4/ose-image-customization-controller-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift4/ose-installer", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift4/ose-installer-altinfra-rhel8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift4/ose-installer-altinfra-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift4/ose-installer-artifacts", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift4/ose-installer-artifacts-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift4/ose-installer-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-08-25T15:16:06Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-79775\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-79775\nhttps://github.com/rclone/rclone/security/advisories/GHSA-6jcg-q3wp-x2f4\nhttps://www.vulncheck.com/advisories/rclone-archive-backend-squashfs-parser-denial-of-service"], "statement": "A flaw was found in the go-diskfs library used by rclone. The SquashFS image parser is vulnerable to denial of service when processing a maliciously crafted SquashFS image. A divide-by-zero error occurs during parsing, causing the application to panic and crash. An attacker who can supply a crafted SquashFS image to an application using go-diskfs for parsing can trigger the crash.", "threat_severity": "Moderate"}

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