Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 3bd04fe7d807bbdcfe75b29ca82fae4e2d7dc524 before 8eb6dc76eeae5302c0d885906a0e469ef9630a59; affected 3bd04fe7d807bbdcfe75b29ca82fae4e2d7dc524 before 6ccbb613b42a1f1ba7bfd547a148f644a902a25c |
| Linux / Linux | affected 6.19; unaffected 0 before 6.19; unaffected 7.0.10 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.