What is GHSA-7638-fmxx-mr26?

GHSA-7638-fmxx-mr26 is a security advisory published by GitHub Security Advisories with unknown severity. In the Linux kernel, the following vulnerability has been resolved: pinctrl: mcp23s08:...

Which CVE IDs does GHSA-7638-fmxx-mr26 cover?

GHSA-7638-fmxx-mr26 covers the following CVE IDs: CVE-2026-53344. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

GHSA-7638-fmxx-mr26unknown

In the Linux kernel, the following vulnerability has been resolved: pinctrl: mcp23s08:...

Vendor

GitHub Security Advisories

Published

July 1, 2026

Last Modified

July 1, 2026

🔗 CVE IDs covered (1)

CVE-2026-53344 →

📋 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.

🔗 References (4)

https://nvd.nist.gov/vuln/detail/CVE-2026-53344
https://git.kernel.org/stable/c/3a13bb9540dfd7014c5601608afcbbadbbcfd673
https://git.kernel.org/stable/c/8473c3a197b57ff01396f7a2ec6ddf65383820d4
https://github.com/advisories/GHSA-7638-fmxx-mr26