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CVE PROGRAM SOURCE RECORD8.8 High

CVE-2026-63885

drm/gem: fix race between change_handle and handle_delete

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: drm/gem: fix race between change_handle and handle_delete drm_gem_change_handle_ioctl leaves the old handle live in the IDR during the window between spin_unlock(table_lock) and the final spin_lock(table_lock). A concurrent drm_gem_handle_delete on the old handle succeeds in this window, decrements handle_count to 0, and frees the GEM object while the new handle's IDR entry still references it. NULL the old handle's IDR entry before dropping table_lock so that any concurrent GEM_CLOSE on the old handle sees NULL and returns -EINVAL. Restore the old entry on the prime-bookkeeping error path.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 672464dd53231509c9c771110798c56d4660e19e to < 0dfa42cfe4dbe114533480503934f43e33c1e83daffected
  • 61bd96d3e5472c253f9c1ab77608f0c8aaa9d025 to < cde2c9257cbe8463b9dcf7b1075177b72b5fd938affected
  • 5e28b7b94408897e41c63477aabc9e1db439bc8c to < 7164d78559b0ff29931a366a840a9e5dd53d4b7caffected

Linux Linux

Default version status: unaffected

  • 6.18.32 to < 6.18.35affected
  • 7.0.9 to < 7.0.12affected

References