CVE-2026-74738

A flaw was found in the regmap: sdw-mbq component of the Linux kernel. This vulnerability occurs when the regmapsdwmbqpollbusy function attempts to call an unset readablereg callback. If a device responds with COMMANDIGNORED, it can lead to a NULL function pointer dereference. This could...

SUSE CVE-2026-74738

In the Linux kernel, the following vulnerability has been resolved: regmap: sdw-mbq: don't call an unset readablereg callback regmapsdwmbqpollbusy decides whether to poll the Function Busy bit by calling ctx-readablereg, which is a straight copy of config-readablereg. That callback is optional:...

CVE-2026-74738

In the Linux kernel, the following vulnerability has been resolved: regmap: sdw-mbq: don't call an unset readablereg callback regmapsdwmbqpollbusy decides whether to poll the Function Busy bit by calling ctx-readablereg, which is a straight copy of config-readablereg. That callback is optional:...

UBUNTU-CVE-2026-74738

In the Linux kernel, the following vulnerability has been resolved: regmap: sdw-mbq: don't call an unset readablereg callback regmapsdwmbqpollbusy decides whether to poll the Function Busy bit by calling ctx-readablereg, which is a straight copy of config-readablereg. That callback is optional:...

CVE-2026-74738 regmap: sdw-mbq: don't call an unset readable_reg callback

In the Linux kernel, the following vulnerability has been resolved: regmap: sdw-mbq: don't call an unset readablereg callback regmapsdwmbqpollbusy decides whether to poll the Function Busy bit by calling ctx-readablereg, which is a straight copy of config-readablereg. That callback is optional:...

CVE-2026-74738

CVE-2026-74738 affects the Linux kernel regmap sdw-mbq (SoundWire Modem Bus Queued) subsystem. The function regmap_sdw_mbq_poll_busy() dereferences ctx->readable_reg() without checking for NULL , but this callback is optional—drivers such as es9356 and tac5xx2-sdw build an MBQ regmap without s...

PT-2026-82118

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the regmap sdw mbq poll busy function where the system attempts to call the readable reg callback without verifying if it is set. Because this callback is optional,...

Linux Distros Unpatched Vulnerability : CVE-2026-74738

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - regmap: sdw-mbq: don't call an unset readablereg callback regmapsdwmbqpollbusy decides whether to poll the Function Busy bit by calling ctx-readablereg, which i...