Vulnerability Description
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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.12, < 6.12.78 |
References
- https://git.kernel.org/stable/c/01f2557aa684e514005541e71a3d01f4cd45c170Patch
- https://git.kernel.org/stable/c/1e9e2640d870d4837bcfdc220cb2c99ae5ee119fPatch
- https://git.kernel.org/stable/c/76326dc06d8793c2c81c31cc0115dbc348de2f88Patch
- https://git.kernel.org/stable/c/e2b424aadecb640f9e037b2891191cf8fd4c64cfPatch
FAQ
What is CVE-2026-23466?
CVE-2026-23466 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 corr...
How severe is CVE-2026-23466?
CVE-2026-23466 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-23466?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.