Answer in brief
CVE-2026-23213 records a Unknown severity vulnerability in drm/amd/pm: Disable MMIO access during SMU Mode 1 reset. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=ea8139d8d59bd6f014b317e7423345169a56fe49 <b2b9ac2bb2c5b5b0a39f7f422bbe12d3ea4ccf34 || >=ea8139d8d59bd6f014b317e7423345169a56fe49 <c1853ebbec980d5c05d431bfd6ded73b1363fd00 || >=ea8139d8d59bd6f014b317e7423345169a56fe49 <cd7ff7fd3e4b77f0b5a292e0926532eaa07c5162 || >=ea8139d8d59bd6f014b317e7423345169a56fe49 <0de604d0357d0d22cbf03af1077d174b641707b6 | b2b9ac2bb2c5b5b0a39f7f422bbe12d3ea4ccf34, c1853ebbec980d5c05d431bfd6ded73b1363fd00, cd7ff7fd3e4b77f0b5a292e0926532eaa07c5162, 0de604d0357d0d22cbf03af1077d174b641707b6 |
| Linux/Linuxgeneric | 5.9 | Not reported |
Published upstream
Feb 18, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 21, 2026
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)
Quoted source text, attributed separately from HOL analysis.