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CVE-2026-90270

arm_mpam: Disable driver unbind to avoid UAF

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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version f04046f2577a5c76167333ca99d3903ee5331ba0
Version < 7d199b6a0651abad3ca6d0877dbedbe8fe6ea9e2
Status affected
Version f04046f2577a5c76167333ca99d3903ee5331ba0
Version < bb1a0f582d519c0461b0940116e2b52c5ba31459
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 6.19
Status affected
Version 0
Version < 6.19
Status unaffected
Version <= 7.2.*
Version 7.2.6
Status unaffected
Version <= *
Version 7.3-rc1
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.16% 0.051
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/7d199b6a0651abad3ca6d0877dbedbe8fe6ea9e2
https://git.kernel.org/stable/c/bb1a0f582d519c0461b0940116e2b52c5ba31459