CVE-2026-90270arm_mpam: Disable driver unbind to avoid UAF
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No exploitation reported and no EPSS estimate yet.
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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
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from f04046f2577a5c76167333ca99d3903ee5331ba0 before 7d199b6a0651abad3ca6d0877dbedbe8fe6ea9e2; from f04046f2577a5c76167333ca99d3903ee5331ba0 before bb1a0f582d519c0461b0940116e2b52c5ba31459 | CNA record |
References
- https://git.kernel.org/stable/c/7d199b6a0651abad3ca6d0877dbedbe8fe6ea9e2
- https://git.kernel.org/stable/c/bb1a0f582d519c0461b0940116e2b52c5ba31459
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.