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CVE-2026-46204 (GCVE-0-2026-46204)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:40 – Updated: 2026-08-05 12:30
VLAI
Title
drm/amdgpu/vcn4: Prevent OOB reads when parsing IB
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/vcn4: Prevent OOB reads when parsing IB Rewrite the IB parsing to use amdgpu_ib_get_value() which handles the bounds checks.
Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 0b15205c7325dc20b7da0068307670d222d66949 , < 1dc005775fb5b3f86464406452b17364f85581d3 (git)
Affected: 0b15205c7325dc20b7da0068307670d222d66949 , < d0802a8877d730260d4af4dd4e0b6cde7e0e593f (git)
Affected: 0b15205c7325dc20b7da0068307670d222d66949 , < a6d5563ba1f03a049561cd347574613167294e8d (git)
Affected: 0b15205c7325dc20b7da0068307670d222d66949 , < 5c3e8ebad0c9e2354ddfa8f2148dc4f70a3b4bd1 (git)
Affected: 0b15205c7325dc20b7da0068307670d222d66949 , < 2444eb0ec8283f4a3845eb7febad378476e1ba3c (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.6.140 , ≤ 6.6.* (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.
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{
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/vcn4: Prevent OOB reads when parsing IB\n\nRewrite the IB parsing to use amdgpu_ib_get_value() which handles the\nbounds checks."
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              "value": "AV:L - Reached only via the local amdgpu command-submission ioctl (DRM_IOCTL_AMDGPU_CS) on a DRM render node; no network or adjacent vector is involved.\nAC:L - The attacker fully controls the IB contents, length_dw, and the backing BO size/layout, so positioning the parser so that idx+6..+8 reads cross the BO\u0027s last mapped page is reliably reproducible.\nPR:L - Requires the ability to open the DRM render node and submit command buffers, i.e. an unprivileged local user with GPU/graphics-session access; no elevated capability is needed.\nUI:N - The malicious command buffer is submitted directly by the attacker; no action by another user is required.\nS:U - Parsing runs on the CPU in kernel context and the OOB access stays within the kernel\u0027s own memory; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The unchecked indexing reads kernel memory beyond the IB buffer object (decode_buffer fields and loop words), an out-of-bounds read of kernel memory that is not strictly limited to a couple of bytes.\nI:N - The flaw is purely an out-of-bounds read; the parser performs no OOB write and the OOB-derived address is re-validated before use, so no kernel data is modifiable.\nA:H - Reading past the BO into an unmapped kernel page faults during command submission, producing a kernel oops/crash that the attacker can trigger on demand."
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    "cveId": "CVE-2026-46204",
    "datePublished": "2026-05-28T09:40:21.933Z",
    "dateReserved": "2026-05-13T15:03:33.104Z",
    "dateUpdated": "2026-08-05T12:30:26.200Z",
    "state": "PUBLISHED"
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      "cve": "CVE-2026-46204",
      "id": "CVE-2026-46204",
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      "status": "interim",
      "title": "SUSE CVE CVE-2026-46204",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-46204.json",
      "version": "10"
    }
  }
}



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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

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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.


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