# CVE-2026-53344: linux: In the Linux kernel, the following vulnerability has been resolved:  pinctrl: mcp23s08: Initialize mcp->dev and mcp->...

CVE-2026-53344 is fixed in linux on 1 platform by DEBIAN-CVE-2026-53344 (version 7.0.13-1), released July 2, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-53344
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0014
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 1, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  pinctrl: mcp23s08: Initialize mcp->dev and mcp->addr before regmap init  Regmap initialization triggers regcache_maple_populate() which attempts SPI read to populate cache. SPI read requires mcp->dev and mcp->addr to be set, without them, NULL pointer dereference occurs during probe.  Move initialization before mcp23s08_spi_regmap_init() call.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.0.13-1 | [DEBIAN-CVE-2026-53344](https://patchblox.com/security/data/fix/linux/debian-cve-2026-53344.md) | Jul 2, 2026 |

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Data as of 2026-11-08T06:59:42Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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