Use-after-free in Linux kernel - CVE-2026-90270
Published: September 18, 2026
Vulnerability identifier: #VU151214
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90270
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to trigger a use-after-free.
The vulnerability exists due to a use-after-free in the MPAM component handling of resctrl_arch_get_config() when unbinding an MSC that is the only MSC for a component and then reading the resctrl schemata file. A local user can unbind an MSC and read the schemata file to trigger a use-after-free.
Affected software
Linux kernel
How to mitigate CVE-2026-90270
Install security update from vendor's repository.