Answer in brief
CVE-2026-53278 records a Medium severity (CVSS 5.5) vulnerability in arm_mpam: Check whether the config array is allocated before destroying it. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=3bd04fe7d807bbdcfe75b29ca82fae4e2d7dc524 <8eb6dc76eeae5302c0d885906a0e469ef9630a59 || >=3bd04fe7d807bbdcfe75b29ca82fae4e2d7dc524 <6ccbb613b42a1f1ba7bfd547a148f644a902a25c | 8eb6dc76eeae5302c0d885906a0e469ef9630a59, 6ccbb613b42a1f1ba7bfd547a148f644a902a25c |
| Linux/Linuxgeneric | 6.19 | Not reported |
Published upstream
Jun 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 26, 2026
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.
Quoted source text, attributed separately from HOL analysis.