CVE-2026-90270

In the Linux kernel, the following vulnerability has been resolved: arm_mpam: Disable driver unbind to avoid UAF When a user unbinds an MSC and that MSC is the only MSC left for a component then the corresponding mpam_component will be freed. If the user then goes on to read the schemata file in the resctrl filesystem then the mpam_component will be accessed from resctrl_arch_get_config() leading to a use after free. As the MPAM driver is not a module the unbind sysfs interface is the only way to trigger the remove. Instead of dealing with the complexity of allowing some unused MSC to unbind just remove the unbind sysfs interface.

CVSS

No CVSS.

References

Link	Resource
https://git.kernel.org/stable/c/7d199b6a0651abad3ca6d0877dbedbe8fe6ea9e2
https://git.kernel.org/stable/c/bb1a0f582d519c0461b0940116e2b52c5ba31459

Configurations

No configuration.

History

17 Sep 2026, 17:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-17 17:17

Updated : 2026-09-17 17:17

NVD link : CVE-2026-90270

Mitre link : CVE-2026-90270

CVE.ORG link : CVE-2026-90270

JSON object : View

Products Affected

No product.

CWE

No CWE.

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