CVE-2026-63885drm/gem: fix race between change_handle and handle_delete
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 672464dd53231509c9c771110798c56d4660e19e builds before 0dfa42cfe4dbe114533480503934f43e33c1e83d; from 61bd96d3e5472c253f9c1ab77608f0c8aaa9d025 before cde2c9257cbe8463b9dcf7b1075177b72b5fd938; from 5e28b7b94408897e41c63477aabc9e1db439bc8c before 7164d78559b0ff29931a366a840a9e5dd53d4b7c | CNA record |
References
- https://git.kernel.org/stable/c/0dfa42cfe4dbe114533480503934f43e33c1e83d
- https://git.kernel.org/stable/c/cde2c9257cbe8463b9dcf7b1075177b72b5fd938
- https://git.kernel.org/stable/c/7164d78559b0ff29931a366a840a9e5dd53d4b7c
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.