In the Linux kernel, the following vulnerability has been resolved:
drm/xe: Open-code GGTT MMIO access protection
GGTT MMIO access is currently protected by hotplug (drm_dev_enter), which works correctly when the driver loads successfully and is later unbound or unloaded. However, if driver load fails, this protection is insufficient because drm_dev_unplug() is never called.
Additionally, devm release functions cannot guarantee that all BOs with GGTT mappings are destroyed before the GGTT MMIO region is removed, as some BOs may be freed asynchronously by worker threads.
To address this, introduce an open-coded flag, protected by the GGTT lock, that guards GGTT MMIO access. The flag is cleared during the dev_fini_ggtt devm release function to ensure MMIO access is disabled once teardown begins.
(cherry picked from commit 4f3a998a173b4325c2efd90bdadc6ccd3ad9a431)
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 23, 2026 | Jul 23, 2026 |
| Redhat_linux | — | No solution existsUpgrade kernel-rtUpgrade kernel | Jul 17, 2026 | Apr 3, 2026 |
| Rocky_linux | — | Upgrade kernelUpgrade kernel-debug-develUpgrade kernel-debugUpgrade kernel-develUpgrade kernel-modules-coreUpgrade kernel-zfcpdump-debuginfoUpgrade kernel-rt-debug-coreUpgrade rtlaUpgrade libperfUpgrade libperf-debuginfoUpgrade perfUpgrade python3-perfUpgrade kernel-zfcpdump-develUpgrade kernel-devel-matchedUpgrade kernel-debug-uki-virtUpgrade kernel-rt-modules-extraUpgrade kernel-debuginfoUpgrade kernel-rt-coreUpgrade kernel-tools-libs-develUpgrade kernel-rt-debugUpgrade kernel-rt-debug-develUpgrade kernel-modulesUpgrade kernel-rt-debug-modulesUpgrade kernel-debuginfo-common-s390xUpgrade kernel-rt-debuginfoUpgrade kernel-rt-debug-modules-extraUpgrade kernel-rt-modulesUpgrade kernel-rtUpgrade kernel-zfcpdump-modulesUpgrade kernel-toolsUpgrade kernel-zfcpdump-modules-coreUpgrade kernel-tools-libsUpgrade kernel-debug-devel-matchedUpgrade kernel-debug-debuginfoUpgrade perf-debuginfoUpgrade kernel-debug-modulesUpgrade kernel-zfcpdump-devel-matchedUpgrade kernel-rt-debug-modules-coreUpgrade kernel-modules-extra-matchedUpgrade kernel-debug-coreUpgrade kernel-coreUpgrade kernel-zfcpdumpUpgrade kernel-debug-modules-extraUpgrade kernel-debug-modules-coreUpgrade python3-perf-debuginfoUpgrade kernel-zfcpdump-modules-extraUpgrade kernel-uki-virt-addonsUpgrade kernel-modules-extraUpgrade kernel-tools-debuginfoUpgrade kernel-rt-develUpgrade rvUpgrade kernel-zfcpdump-coreUpgrade kernel-rt-modules-coreUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-rt-debug-debuginfoUpgrade kernel-uki-virt | Sep 17, 2026 | Sep 15, 2026 |
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