CVE-2026-46201 (GCVE-0-2026-46201)
Vulnerability from cvelistv5 – Published: 2026-05-28 09:40 – Updated: 2026-08-05 12:30
VLAI
EPSS
VEX
Title
drm/xe: Fix dma-buf attachment leak in xe_gem_prime_import()
Summary
In the Linux kernel, the following vulnerability has been resolved:
drm/xe: Fix dma-buf attachment leak in xe_gem_prime_import()
When xe_dma_buf_init_obj() fails, the attachment from
dma_buf_dynamic_attach() is not detached. Add dma_buf_detach() before
returning the error. Note: we cannot use goto out_err here because
xe_dma_buf_init_obj() already frees bo on failure, and out_err would
double-free it.
(cherry picked from commit a828eb185aac41800df8eae4b60501ccc0dbbe51)
Severity
7.8 (High)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
dd08ebf6c3525a7ea2186e636df064ea47281987 , < d394669e194936d7ce15284a24a5ae334c4c5b74
(git)
Affected: dd08ebf6c3525a7ea2186e636df064ea47281987 , < 0afa8b1ef582ecf6fb04097fd356f8741e5005ed (git) Affected: dd08ebf6c3525a7ea2186e636df064ea47281987 , < eea1e10f8d99c0f04deef707c99705b94bba3b78 (git) Affected: dd08ebf6c3525a7ea2186e636df064ea47281987 , < 111ab678471bf1f90d078d5513bb086b70596c3c (git) |
guessed | |
| Linux | Linux |
Affected:
6.8
Unaffected: 0 , < 6.8 (semver) Unaffected: 6.12.90 , ≤ 6.12.* (semver) Unaffected: 6.18.32 , ≤ 6.18.* (semver) Unaffected: 7.0.9 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
guessed |
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"value": "AV:L - The vulnerable code is reached via the DRM_IOCTL_PRIME_FD_TO_HANDLE ioctl on the xe device node (drivers/gpu/drm/xe/xe_dma_buf.c), which requires local access to /dev/dri/renderD*. There is no network path.\nAC:L - The leak/UAF triggers when xe_dma_buf_init_obj() fails (ENOMEM in bo creation), a condition the attacker can induce via memory pressure and unlimited retries; per the higher-severity rule this is Low.\nPR:L - The PRIME_FD_TO_HANDLE ioctl is DRM_RENDER_ALLOW and the xe driver exposes DRIVER_RENDER render nodes, so any unprivileged local user with render-node access can trigger it. No real root is required.\nUI:N - The attacker performs the prime-import ioctl directly; no victim action is needed.\nS:U - The dangling attachment and freed bo are kernel-internal to the GPU/dma-buf subsystem; the impact stays within the kernel\u0027s security authority.\nC:H - The leaked attachment leaves a dangling importer_priv to the freed bo; via the exporter\u0027s move_notify path the freed (reallocatable) object is dereferenced, enabling disclosure of attacker-influenced freed-object contents (UAF).\nI:H - The use-after-free allows the freed bo to be reclaimed and controlled via heap spray, after which xe_dma_buf_move_notify()/xe_bo_evict() operate on attacker-controlled memory, yielding a write/control-flow primitive.\nA:H - Dereferencing the freed bo through the leaked attachment\u0027s move_notify callback corrupts kernel state and readily causes an oops/panic; the attachment also constitutes a kernel memory leak."
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