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CVE-2026-63884 is a use-after-free vulnerability in the Linux kernel's drm/i915 graphics driver, specifically in the TTM object purge path. The flaw arises because the buffer object's bo->ttm pointer can be changed during a call to ttm_bo_validate(), while subsequent code may continue using a previously derived i915_tt pointer obtained before that validation step. In the vulnerable flow, object eviction and purge handling can replace the i915 TTM page vector container with a new instance when the object is still busy and marked as no longer needed. Later dereference of fields from the stale container can access freed memory, leading to a general protection fault in i915_ttm_purge. The fix delays casting bo->ttm to an i915_tt object until after ttm_bo_validate() returns, ensuring the code uses the current pointer.
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A specific vulnerability affecting Red Hat Enterprise Linux 10.2 kernel-related packages; the content does not provide technical details beyond listing it in the advisory.
A specific vulnerability affecting Red Hat Enterprise Linux 9 kernel-related packages, referenced in RHSA-2026:57252.
Linux kernel drm/i915 use-after-free vulnerability in TTM object purge.
A Linux kernel vulnerability in drm/i915 involving a potential use-after-free in TTM object purge.
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Cross-references every affected SKU, including bundled OEM variants.
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