# CVE-2026-79775: rclone: rclone versions >= v1.72.0 and <= v1.74.4 (fixed in v1.75.0) contain multiple denial-of-service vulnerabilities in th...

CVE-2026-79775 is fixed in 3 products on 1 platform, first by ALAS2023-2026-3129, released September 28, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-79775
- Priority: High
- CVSS: n/a (important)
- EPSS: 0.0037
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 28, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | rclone amzn 2023 | 1.75.1-1.amzn2023 | [ALAS2023-2026-3129](https://patchblox.com/security/data/fix/linux/alas2023-2026-3129.md) | Sep 28, 2026 |
| Linux | rclone-debuginfo amzn 2023 | 1.75.1-1.amzn2023 | [ALAS2023-2026-3129](https://patchblox.com/security/data/fix/linux/alas2023-2026-3129.md) | Sep 28, 2026 |
| Linux | rclone-debugsource amzn 2023 | 1.75.1-1.amzn2023 | [ALAS2023-2026-3129](https://patchblox.com/security/data/fix/linux/alas2023-2026-3129.md) | Sep 28, 2026 |

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Data as of 2026-11-11T07:45:43Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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