CVE-2026-23213 (GCVE-0-2026-23213)

Vulnerability from cvelistv5 – Published: 2026-02-18 14:21 – Updated: 2026-05-11 22:02
VLAI
Title
drm/amd/pm: Disable MMIO access during SMU Mode 1 reset
Summary
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)
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: ea8139d8d59bd6f014b317e7423345169a56fe49 , < c1853ebbec980d5c05d431bfd6ded73b1363fd00 (git)
Affected: ea8139d8d59bd6f014b317e7423345169a56fe49 , < cd7ff7fd3e4b77f0b5a292e0926532eaa07c5162 (git)
Affected: ea8139d8d59bd6f014b317e7423345169a56fe49 , < 0de604d0357d0d22cbf03af1077d174b641707b6 (git)
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Linux Linux Affected: 5.9
Unaffected: 0 , < 5.9 (semver)
Unaffected: 6.12.70 , ≤ 6.12.* (semver)
Unaffected: 6.18.10 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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            "drivers/gpu/drm/amd/amdgpu/amdgpu_device.c",
            "drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c",
            "drivers/gpu/drm/amd/pm/swsmu/smu14/smu_v14_0_2_ppt.c"
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}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.