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.
Metrics
Affected Vendors & Products
References
History
Tue, 25 Aug 2026 16:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Tue, 25 Aug 2026 15:30:00 +0000
| Type | Values Removed | Values Added |
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| Description | 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. | |
| Title | rclone Archive Backend SquashFS Parser Denial of Service | |
| First Time appeared |
Rclone
Rclone rclone |
|
| Weaknesses | CWE-129 | |
| CPEs | cpe:2.3:a:rclone:rclone:-:*:*:*:*:*:*:* | |
| Vendors & Products |
Rclone
Rclone rclone |
|
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-08-25T16:08:49.589Z
Reserved: 2026-08-25T14:29:43.528Z
Link: CVE-2026-79775
Updated: 2026-08-25T16:08:21.642Z
Status : Received
Published: 2026-08-25T16:17:29.233
Modified: 2026-08-25T17:18:18.013
Link: CVE-2026-79775
No data.
OpenCVE Enrichment
Updated: 2026-08-25T17:45:04Z