AZL-77858
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-77858.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/AZL-77858
- Upstream
- Published
- 2026-02-18T15:18:42Z
- Modified
- 2026-04-01T05:23:10.345829Z
- Summary
- CVE-2026-23213 affecting package kernel 6.6.126.1-1
- Details
-
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_accessflag 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)
- References