CVE-2026-52965

Technical Description

In the Linux kernel, the following vulnerability has been resolved:

drm/ttm: Fix ttm_bo_swapout() infinite LRU walk on swapout failure

When ttm_tt_swapout() fails, the current code calls

ttm_resource_add_bulk_move() followed by ttm_resource_move_to_lru_tail()

to restore the resource's bulk_move membership.

However, ttm_resource_move_to_lru_tail() places the resource at the tail

of the LRU list which, relative to the walk cursor's hitch node (placed

immediately after the resource when it was yielded), puts the resource

*in front of the* the hitch. The next list_for_each_entry_continue() from

the hitch finds the same resource again, causing an infinite loop.

Fix by deferring del_bulk_move to the success path only.

On the success path, TTM_TT_FLAG_SWAPPED has just been set by

ttm_tt_swapout() but the resource is still tracked in the bulk_move range,

so ttm_resource_del_bulk_move()'s !ttm_resource_unevictable() guard would

incorrectly skip the removal. Introduce

ttm_resource_del_bulk_

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected Products

References