Bug 2536987

Summary:	CVE-2026-88016 rclone: rclone: Directory metadata escape via planted symlink allows unauthorized file modification [epel-all]
Product:	[Fedora] Fedora EPEL	Reporter:	Vladimir Vasilev <vvasilev>
Component:	rclone	Assignee:	Mikel Olasagasti Uranga <mikel>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	high
Version:	epel10	CC:	go-sig, mikel
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["f337a350-1806-4a1e-9fa0-7c943287f406"]}
Fixed In Version:	rclone-1.75.2-1.el10_3 rclone-1.75.2-1.el10_4 rclone-1.75.2-2.el9 rclone-1.75.2-1.el10_2	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-10-21 00:42:29 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2531539

Description Vladimir Vasilev 2026-09-18 11:47:54 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.

Comment 1 Fedora Update System 2026-10-11 11:36:02 UTC

FEDORA-EPEL-2026-954982c495 (rclone-1.75.2-2.el9) has been submitted as an update to Fedora EPEL 9.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-954982c495

Comment 2 Fedora Update System 2026-10-13 01:28:06 UTC

FEDORA-EPEL-2026-7f7663646b has been pushed to the Fedora EPEL 10.2 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-7f7663646b

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 3 Fedora Update System 2026-10-13 01:51:30 UTC

FEDORA-EPEL-2026-17f3815271 has been pushed to the Fedora EPEL 10.3 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-17f3815271

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 4 Fedora Update System 2026-10-13 02:17:26 UTC

FEDORA-EPEL-2026-f9baf30320 has been pushed to the Fedora EPEL 10.4 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-f9baf30320

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 5 Fedora Update System 2026-10-13 02:31:22 UTC

FEDORA-EPEL-2026-954982c495 has been pushed to the Fedora EPEL 9 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-954982c495

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 6 Fedora Update System 2026-10-21 00:42:29 UTC

FEDORA-EPEL-2026-17f3815271 (rclone-1.75.2-1.el10_3) has been pushed to the Fedora EPEL 10.3 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 7 Fedora Update System 2026-10-21 00:59:14 UTC

FEDORA-EPEL-2026-f9baf30320 (rclone-1.75.2-1.el10_4) has been pushed to the Fedora EPEL 10.4 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 8 Fedora Update System 2026-10-21 01:18:09 UTC

FEDORA-EPEL-2026-954982c495 (rclone-1.75.2-2.el9) has been pushed to the Fedora EPEL 9 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 9 Fedora Update System 2026-10-21 02:48:51 UTC

FEDORA-EPEL-2026-7f7663646b (rclone-1.75.2-1.el10_2) has been pushed to the Fedora EPEL 10.2 stable repository.
If problem still persists, please make note of it in this bug report.