Bug 2524268 - CVE-2026-48750 incus: Incus has an arbitrary file write on host via `exec-output` symlink in crafted image [fedora-all]
Summary: CVE-2026-48750 incus: Incus has an arbitrary file write on host via `exec-out...
Keywords:
Status: NEW
Alias: None
Product: Fedora
Classification: Fedora
Component: incus
Version: rawhide
Hardware: Unspecified
OS: Unspecified
urgent
urgent
Target Milestone: ---
Assignee: Neal Gompa
QA Contact:
URL:
Whiteboard: {"flaws": ["89f59043-ffda-4aa6-ae79-7...
Depends On:
Blocks: CVE-2026-48750
TreeView+ depends on / blocked
 
Reported: 2026-08-26 07:58 UTC by Thibault Guittet
Modified: 2026-08-26 07:58 UTC (History)
7 users (show)

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


Attachments (Terms of Use)

Description Thibault Guittet 2026-08-26 07:58:05 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.

Incus is a system container and virtual machine manager. Prior to version 7.2.0, the `record-output` parameter of the `/instances/$name/exec` endpoint stores the output of the command in the `exec-output` directory of the instance. If `exec-output` is a symlink, file named `exec_UUID.stdout` and `exec_UUID.stderr` can be written to an arbitrary location where the `.stdout` file will contain arbitrary content. This behavior can be abused for arbitrary command execution. Version 7.2.0 contains a patch.


Note You need to log in before you can comment on or make changes to this bug.