Bug 2536548 (CVE-2026-90271) - CVE-2026-90271 kernel: arm_mpam: Fix a NULL pointer dereference on unbinding after an error interrupt
Summary: CVE-2026-90271 kernel: arm_mpam: Fix a NULL pointer dereference on unbinding ...
Keywords:
Status: NEW
Alias: CVE-2026-90271
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-17 18:22 UTC by OSIDB Bzimport
Modified: 2026-10-06 14:21 UTC (History)
17 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-09-17 18:22:05 UTC 
In the Linux kernel, the following vulnerability has been resolved:

arm_mpam: Fix a NULL pointer dereference on unbinding after an error interrupt

If a user unbinds an MSC after mpam_disable() has been run in response
to an error interrupt then a dereference of a NULL pointer occurs as
mpam_disable() sets the drvdata to NULL. Add an early return to the driver
remove callback to avoid this.
Comment 1 gkamathe 2026-09-23 23:20:15 UTC 
Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90271.mbox
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