CVE-2026-90396: block: fix dio leak on metadata mapping error
Published Sep 17, 2026
·Updated
In the Linux kernel, the following vulnerability has been resolved:
block: fix dio leak on metadata mapping error
A failed integrity mapping holds a dio reference, so we need to go through the full bio ending in case there were previously submitted bio's in the sequence.
Event History
Sep 17, 2026
CVE Published
via MITRE·04:09 PM
Data Sourced
via MITRE·04:09 PM
Description
Frequently Asked Questions
1
Which I/O path is implicated?
The issue occurs when an integrity mapping fails during direct I/O. In that error path, a DIO reference can remain held, particularly when earlier BIOs in the sequence were already submitted.
2
What can be used to verify that a kernel includes the fix?
Check the kernel source or stable backport history for the referenced commits: d29c5a88d5703afb6286038e86e1b88daa4962a9, cbbaf0c870dde06cf4b887a77a94e3094179ca9f, or 702a2a9f3dfe066a7481698c858371112f3cb697. The provided data does not identify the affected or fixed kernel versions.