CVE-2026-53278 is a vulnerability in Linux Kernel
Published on June 26, 2026
arm_mpam: Check whether the config array is allocated before destroying it
In the Linux kernel, the following vulnerability has been resolved:
arm_mpam: Check whether the config array is allocated before destroying it
__destroy_component_cfg() is called to free the configuration array.
It uses the embedded 'garbage' structure, which means the array has
to be allocated.
If __destroy_component_cfg() is called from mpam_disable() before the
configuration was ever allocated, then a NULL pointer is dereferenced.
Check for this case and return early if the configuration is not
allocated.
__destroy_component_cfg() also frees the mbwu_state as this is allocated
by __allocate_component_cfg(). As the mbwu_state is allocated after
comp->cfg is set, and is also under mpam_list_lock, only the first
pointer needs checking.
Products Associated with CVE-2026-53278
Want to know whenever a new CVE is published for Linux Kernel? stack.watch will email you.
Affected Versions
Linux:- Version 3bd04fe7d807bbdcfe75b29ca82fae4e2d7dc524 and below 8eb6dc76eeae5302c0d885906a0e469ef9630a59 is affected.
- Version 3bd04fe7d807bbdcfe75b29ca82fae4e2d7dc524 and below 6ccbb613b42a1f1ba7bfd547a148f644a902a25c is affected.
- Version 6.19 is affected.
- Before 6.19 is unaffected.
- Version 7.0.10, <= 7.0.* is unaffected.
- Version 7.1, <= * is unaffected.