CVE-2026-68106 (GCVE-0-2026-68106)

Vulnerability from cvelistv5 – Published: 2026-08-10 11:58 – Updated: 2026-08-19 16:29
VLAI
Title
drm/amdgpu: fix division by zero with invalid uvd dimensions
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix division by zero with invalid uvd dimensions When width or height is less than 16, width_in_mb or height_in_mb becomes 0, leading to fs_in_mb being 0. This causes a division by zero when calculating num_dpb_buffer in H264 and H264 Perf decode paths. Add validation to reject frames with width < 16 or height < 16 before performing any calculations that depend on these values. V2: Format change - move up all vaiable definitions. V3: Use warn_once to avoid spam. (cherry picked from commit 3e41d26c70b0a459d041cc19482a226c4b7423cb)
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: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < 004d0453cfef16f056cb7b8bc04f69f19cf9df32 (git)
Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < 00ee64910ecf748cc15b23bbcbea472c203ec1e8 (git)
Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < 81c9b4921f62d1642b9d775524ae9240e521a5ed (git)
Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < 52f9a588296432accf2982f7d258192a37562f4f (git)
Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < a00946b5ab7c25da5685ca9c58f50ff6f43c0fdf (git)
Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < ffb33d466a68cea3e8a3dbed04d79037a3cbabd1 (git)
Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < be725ab23aa45c11a5afef3e2a9f6d8c084ae5dc (git)
Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < 0c01c811be47e6b146552dd59bfedbea8f09b8f4 (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.2
Unaffected: 0 , < 4.2 (semver)
Unaffected: 5.10.265 , ≤ 5.10.* (semver)
Unaffected: 5.15.216 , ≤ 5.15.* (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.148 , ≤ 6.6.* (semver)
Unaffected: 6.12.101 , ≤ 6.12.* (semver)
Unaffected: 6.18.42 , ≤ 6.18.* (semver)
Unaffected: 7.1.6 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: fix division by zero with invalid uvd dimensions\n\nWhen width or height is less than 16, width_in_mb or height_in_mb\nbecomes 0, leading to fs_in_mb being 0. This causes a division by\nzero when calculating num_dpb_buffer in H264 and H264 Perf decode\npaths.\n\nAdd validation to reject frames with width \u003c 16 or height \u003c 16\nbefore performing any calculations that depend on these values.\n\nV2: Format change - move up all vaiable definitions.\nV3: Use warn_once to avoid spam.\n\n(cherry picked from commit 3e41d26c70b0a459d041cc19482a226c4b7423cb)"
        }
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
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            {
              "lang": "en",
              "value": "AV:L - The flaw is reached only via the AMDGPU_CS DRM ioctl on a local render node (/dev/dri/renderD*), traversing amdgpu_cs_ioctl, amdgpu_cs_patch_ibs, amdgpu_uvd_ring_parse_cs, and amdgpu_uvd_cs_msg_decode; it is not reachable from any network-facing kernel service.\nAC:L - An attacker with render-node access fully controls the UVD decode message fields (stream_type H264/H264 Perf, width, height, level) in their own BO and can reliably trigger width or height \u003c 16 after creating a valid UVD session handle.\nPR:L - Exploitation requires only standard unprivileged local access to the AMDGPU DRM render node (DRM_AUTH|DRM_RENDER_ALLOW on AMDGPU_CS), not root or capabilities outside the render/video group; user namespaces do not grant this access by themselves.\nUI:N - No victim interaction is required; a local attacker can directly submit a crafted UVD command stream through AMDGPU_CS ioctl without needing another user to open media, mount a filesystem, or take any other action.\nS:U - Impact is confined to the kernel/GPU driver security domain on the local host (kernel oops or GPU memory corruption within the attacker\u0027s DRM client); it does not cross VM, IOMMU, or sandbox boundaries to affect a different security authority.\nC:H - On x86, kernel-mode divide-by-zero causes a fatal trap; on architectures where unsigned division by zero returns zero, underestimated DPB buffer sizes can pass validation, enabling GPU out-of-bounds reads of adjacent mapped buffers that may hold sensitive data.\nI:H - Underestimated buffer-size calculations from zero macroblock counts can let undersized DPB buffers pass kernel validation, permitting the UVD engine to perform out-of-bounds writes into adjacent GPU-mapped memory that could be leveraged for further memory corruption.\nA:H - Triggering the divide-by-zero in kernel context during CS parsing causes an x86 divide-error exception leading to die()/kernel oops, crashing or hanging the system; repeated submissions can deny GPU/video availability on affected UVD hardware (v3.1-v6.0)."
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        "dateUpdated": "2026-08-19T16:29:19.954Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/004d0453cfef16f056cb7b8bc04f69f19cf9df32"
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    "datePublished": "2026-08-10T11:58:23.108Z",
    "dateReserved": "2026-07-30T09:28:09.368Z",
    "dateUpdated": "2026-08-19T16:29:19.954Z",
    "state": "PUBLISHED"
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This causes a division by\\nzero when calculating num_dpb_buffer in H264 and H264 Perf decode\\npaths.\\n\\nAdd validation to reject frames with width \u003c 16 or height \u003c 16\\nbefore performing any calculations that depend on these values.\\n\\nV2: Format change - move up all vaiable definitions.\\nV3: Use warn_once to avoid spam.\\n\\n(cherry picked from commit 3e41d26c70b0a459d041cc19482a226c4b7423cb)\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"d38ceaf99ed015f2a0b9af3499791bd3a3daae21\",\"lessThan\":\"004d0453cfef16f056cb7b8bc04f69f19cf9df32\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d38ceaf99ed015f2a0b9af3499791bd3a3daae21\",\"lessThan\":\"00ee64910ecf748cc15b23bbcbea472c203ec1e8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d38ceaf99ed015f2a0b9af3499791bd3a3daae21\",\"lessThan\":\"81c9b4921f62d1642b9d775524ae9240e521a5ed\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d38ceaf99ed015f2a0b9af3499791bd3a3daae21\",\"lessThan\":\"52f9a588296432accf2982f7d258192a37562f4f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d38ceaf99ed015f2a0b9af3499791bd3a3daae21\",\"lessThan\":\"a00946b5ab7c25da5685ca9c58f50ff6f43c0fdf\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d38ceaf99ed015f2a0b9af3499791bd3a3daae21\",\"lessThan\":\"ffb33d466a68cea3e8a3dbed04d79037a3cbabd1\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d38ceaf99ed015f2a0b9af3499791bd3a3daae21\",\"lessThan\":\"be725ab23aa45c11a5afef3e2a9f6d8c084ae5dc\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d38ceaf99ed015f2a0b9af3499791bd3a3daae21\",\"lessThan\":\"0c01c811be47e6b146552dd59bfedbea8f09b8f4\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.2\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.2\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.265\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.216\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.183\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.148\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.101\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.42\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.6\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/004d0453cfef16f056cb7b8bc04f69f19cf9df32\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/00ee64910ecf748cc15b23bbcbea472c203ec1e8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/0c01c811be47e6b146552dd59bfedbea8f09b8f4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/52f9a588296432accf2982f7d258192a37562f4f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/81c9b4921f62d1642b9d775524ae9240e521a5ed\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a00946b5ab7c25da5685ca9c58f50ff6f43c0fdf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/be725ab23aa45c11a5afef3e2a9f6d8c084ae5dc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ffb33d466a68cea3e8a3dbed04d79037a3cbabd1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-13T23:19:11+00:00",
      "cve": "CVE-2026-68106",
      "id": "CVE-2026-68106",
      "initial_release_date": "2026-08-10T00:00:00+00:00",
      "product_status:known_affected": "275",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: drm/amdgpu: fix division by zero with invalid uvd dimensions",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68106.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-13T01:28:23Z",
      "cve": "CVE-2026-68106",
      "id": "CVE-2026-68106",
      "initial_release_date": "2026-08-13T01:28:23Z",
      "product_status:known_affected": "209",
      "product_status:known_not_affected": "87",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-68106",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68106.json",
      "version": "2"
    }
  }
}



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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.