Bug 2493771 (CVE-2026-53294) - CVE-2026-53294 kernel: mailbox: mailbox-test: don't free the reused channel
Summary: CVE-2026-53294 kernel: mailbox: mailbox-test: don't free the reused channel
Keywords:
Status: NEW
Alias: CVE-2026-53294
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 21:06 UTC by OSIDB Bzimport
Modified: 2026-06-29 08:10 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
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Description OSIDB Bzimport 2026-06-26 21:06:36 UTC 
In the Linux kernel, the following vulnerability has been resolved:

mailbox: mailbox-test: don't free the reused channel

The RX channel can be aliased to the TX channel if it has a different
MMIO. This special case needs to be handled when freeing the channels
otherwise a double-free occurs.
Comment 1 Mauro Matteo Cascella 2026-06-29 08:08:32 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026062617-CVE-2026-53294-0b30@gregkh/T
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