# CVE-2026-53278: linux: In the Linux kernel, the following vulnerability has been resolved:  arm_mpam: Check whether the config array is allo...

CVE-2026-53278 is fixed in linux on 1 platform by DEBIAN-CVE-2026-53278 (version 7.0.10-1), released June 27, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-53278
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0014
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 26, 2026

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.0.10-1 | [DEBIAN-CVE-2026-53278](https://patchblox.com/security/data/fix/linux/debian-cve-2026-53278.md) | Jun 27, 2026 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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