Bug 2493734 (CVE-2026-53296) - CVE-2026-53296 kernel: mailbox: mailbox-test: free channels on probe error
Summary: CVE-2026-53296 kernel: mailbox: mailbox-test: free channels on probe error
Keywords:
Status: NEW
Alias: CVE-2026-53296
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-26 21:04 UTC by OSIDB Bzimport
Modified: 2026-06-29 09:25 UTC (History)
2 users (show)

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

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Description OSIDB Bzimport 2026-06-26 21:04:02 UTC 
In the Linux kernel, the following vulnerability has been resolved:

mailbox: mailbox-test: free channels on probe error

On probe error, free the previously obtained channels. This not only
prevents a leak, but also UAF scenarios because the client structure
will be removed nonetheless because it was allocated with devm.
Comment 1 Mauro Matteo Cascella 2026-06-29 09:23:51 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026062618-CVE-2026-53296-fd81@gregkh/T
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