CVE-2026-90270
CVE CVE-2026-90270EUVD EUVD-2026-81863Published 2026-09-17T16:08:04.000Z
What the advisory describes
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.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux f04046f2577a5c76167333ca99d3903ee5331ba0 <7d199b6a0651abad3ca6d0877dbedbe8fe6ea9e2; 6.19; patch: 7.3-rc1; f04046f2577a5c76167333ca99d3903ee5331ba0 <bb1a0f582d519c0461b0940116e2b52c5ba31459; patch: 0; patch: 7.2.6
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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