Riskcovery

CVE-2026-23213

drm/amd/pm: Disable MMIO access during SMU Mode 1 reset

State
Published
Severity
Not scored
Published
Feb 18, 2026
Updated
Oct 30, 2026
Reserved
Jan 13, 2026

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

drm/amd/pm: Disable MMIO access during SMU Mode 1 reset

During Mode 1 reset, the ASIC undergoes a reset cycle and becomes temporarily inaccessible via PCIe. Any attempt to access MMIO registers during this window (e.g., from interrupt handlers or other driver threads) can result in uncompleted PCIe transactions, leading to NMI panics or system hangs.

To prevent this, set the `no_hw_access` flag to true immediately after triggering the reset. This signals other driver components to skip register accesses while the device is offline.

A memory barrier `smp_mb()` is added to ensure the flag update is globally visible to all cores before the driver enters the sleep/wait state.

(cherry picked from commit 7edb503fe4b6d67f47d8bb0dfafb8e699bb0f8a4)

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • ea8139d8d59bd6f014b317e7423345169a56fe49 to before 4027796f024dabb2766afde4f7e772c92bc4d056Affected
  • ea8139d8d59bd6f014b317e7423345169a56fe49 to before b2b9ac2bb2c5b5b0a39f7f422bbe12d3ea4ccf34Affected
  • ea8139d8d59bd6f014b317e7423345169a56fe49 to before c1853ebbec980d5c05d431bfd6ded73b1363fd00Affected
  • ea8139d8d59bd6f014b317e7423345169a56fe49 to before cd7ff7fd3e4b77f0b5a292e0926532eaa07c5162Affected
  • ea8139d8d59bd6f014b317e7423345169a56fe49 to before 0de604d0357d0d22cbf03af1077d174b641707b6Affected
LinuxLinux
  • 5.9Affected
  • before 5.9Not affected
  • 6.1.191 through 6.1.*Not affected
  • 6.6.160 through 6.6.*Not affected
  • 6.12.70 through 6.12.*Not affected
  • 6.18.10 through 6.18.*Not affected
  • 6.19 and laterNot affected

References

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