Bug 2536986 - CVE-2026-88016 rclone: rclone: Directory metadata escape via planted symlink allows unauthorized file modification [fedora-all]
Summary: CVE-2026-88016 rclone: rclone: Directory metadata escape via planted symlink ...
Keywords:
Status: NEW
Alias: None
Product: Fedora
Classification: Fedora
Component: rclone
Version: rawhide
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: ---
Assignee: Mikel Olasagasti Uranga
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["f337a350-1806-4a1e-9fa0-7...
Depends On:
Blocks: CVE-2026-88016
TreeView+ depends on / blocked
 
Reported: 2026-09-18 11:47 UTC by Vladimir Vasilev
Modified: 2026-09-18 11:47 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Type: ---
Embargoed:


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Description Vladimir Vasilev 2026-09-18 11:47:43 UTC
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

rclone is a command-line program to sync files and directories to and from different cloud storage providers. Prior to 1.75.1, when backend/local runs with --links, a source .rclonelink object can plant a symlink in the destination and later directory metadata is applied through that path. MkdirMetadata, writeMetadataToFile, and setTimes operate when Directory.translatedLink=false, so os.Chown, os.Chmod, os.Chtimes, and birth-time handling can bypass os.Root confinement and follow the symlink. An attacker controlling source contents can therefore apply selected ownership, permissions, modification times, or birth times to a file or directory outside the destination, with --metadata required for chmod and chown while modification time is applied by the normal directory workflow. This issue is fixed in version 1.75.1.


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