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CVE-2026-46201 (GCVE-0-2026-46201)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:40 – Updated: 2026-08-05 12:30
VLAI
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)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted 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 Create a notification for this product.
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 Create a notification for this product.
Show details on NVD website
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{
  "containers": {
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      "affected": [
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/xe/xe_dma_buf.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe: Fix dma-buf attachment leak in xe_gem_prime_import()\n\nWhen xe_dma_buf_init_obj() fails, the attachment from\ndma_buf_dynamic_attach() is not detached. Add dma_buf_detach() before\nreturning the error. Note: we cannot use goto out_err here because\nxe_dma_buf_init_obj() already frees bo on failure, and out_err would\ndouble-free it.\n\n(cherry picked from commit a828eb185aac41800df8eae4b60501ccc0dbbe51)"
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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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        "shortName": "Linux"
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    "dateReserved": "2026-05-13T15:03:33.104Z",
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    "state": "PUBLISHED"
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    "redhat_vex": {
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      "cve": "CVE-2026-46201",
      "id": "CVE-2026-46201",
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      "product_status:known_affected": "184",
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      "source": "Red Hat CSAF VEX",
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      "title": "kernel: drm/xe: Fix dma-buf attachment leak in xe_gem_prime_import()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46201.json",
      "version": "3"
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      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T16:54:38Z",
      "cve": "CVE-2026-46201",
      "id": "CVE-2026-46201",
      "initial_release_date": "2026-05-29T01:15:17Z",
      "product_status:first_fixed": "2",
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      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-46201",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-46201.json",
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.