CVE-2026-63885
HIGH
MEDIUM
Priority: 0.01
BB Relevance:
43/100
Published: 2026-07-19
Modified: 2026-10-26
First seen: 2026-10-29
Status: active
Attack Surface
Low Complexity
No Interaction
Conf. Impact
Integ. Impact
Scope Change
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
Low
UI:
None
S:
Changed
C:
High
I:
High
A:
High
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.
Weakness Classification (1)
Affected Software (5)
| Vendor | Product | Version |
|---|---|---|
| linux | linux_kernel | 6.18.32 – 6.18.35 |
| linux | linux_kernel | 7.0.9 – 7.0.12 |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | 7.1 |
References & Advisories (3)
Patch
Patch
Patch