CVE-2024-46811 (GCVE-0-2024-46811)

Vulnerability from cvelistv5 – Published: 2024-09-27 12:35 – Updated: 2026-10-30 12:19
VLAI
Title
drm/amd/display: Fix index may exceed array range within fpu_update_bw_bounding_box
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix index may exceed array range within fpu_update_bw_bounding_box [Why] Coverity reports OVERRUN warning. soc.num_states could be 40. But array range of bw_params->clk_table.entries is 8. [How] Assert if soc.num_states greater than 8.
Severity
7.3 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-29 14:19 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6641 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c , < 6d8685dd9718e0613f7c64253500874021b9efc9 (git)
Affected: 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c , < 4003bac784380fed1f94f197350567eaa73a409d (git)
Affected: 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c , < aba188d6f4ebaf52acf13f204db2bd2c22072504 (git)
Affected: 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c , < 188fd1616ec43033cedbe343b6579e9921e2d898 (git)
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Linux Linux Affected: 4.15
Unaffected: 0 , < 4.15 (semver)
Unaffected: 6.1.191 , ≤ 6.1.* (semver)
Unaffected: 6.6.50 , ≤ 6.6.* (semver)
Unaffected: 6.10.9 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)
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                "drivers/gpu/drm/amd/display/dc/dml/dcn303/dcn303_fpu.c",
                "drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c",
                "drivers/gpu/drm/amd/display/dc/dml/dcn321/dcn321_fpu.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "6d8685dd9718e0613f7c64253500874021b9efc9",
                  "status": "affected",
                  "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c",
                  "versionType": "git"
                },
                {
                  "lessThan": "4003bac784380fed1f94f197350567eaa73a409d",
                  "status": "affected",
                  "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c",
                  "versionType": "git"
                },
                {
                  "lessThan": "aba188d6f4ebaf52acf13f204db2bd2c22072504",
                  "status": "affected",
                  "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c",
                  "versionType": "git"
                },
                {
                  "lessThan": "188fd1616ec43033cedbe343b6579e9921e2d898",
                  "status": "affected",
                  "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "drivers/gpu/drm/amd/display/dc/dml/dcn302/dcn302_fpu.c",
                "drivers/gpu/drm/amd/display/dc/dml/dcn303/dcn303_fpu.c",
                "drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c",
                "drivers/gpu/drm/amd/display/dc/dml/dcn321/dcn321_fpu.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "4.15"
                },
                {
                  "lessThan": "4.15",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.1.*",
                  "status": "unaffected",
                  "version": "6.1.191",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.6.*",
                  "status": "unaffected",
                  "version": "6.6.50",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.10.*",
                  "status": "unaffected",
                  "version": "6.10.9",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.11",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.191",
                      "versionStartIncluding": "4.15",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.6.50",
                      "versionStartIncluding": "4.15",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.10.9",
                      "versionStartIncluding": "4.15",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.11",
                      "versionStartIncluding": "4.15",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Fix index may exceed array range within fpu_update_bw_bounding_box\n\n[Why]\nCoverity reports OVERRUN warning. soc.num_states could\nbe 40. But array range of bw_params-\u003eclk_table.entries is 8.\n\n[How]\nAssert if soc.num_states greater than 8."
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "baseScore": 7.3,
                "baseSeverity": "HIGH",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H",
                "version": "3.1"
              },
              "scenarios": [
                {
                  "lang": "en",
                  "value": "AV:L - The vulnerable code is reached only through amdgpu DC initialization paths on the local machine \u2014 `dc_construct()`, `dcn32_init_hw()`, and `get_memclk_states_from_smu()` during hardware init and suspend/resume. There is no network, adjacent-network, or physical-device vector.\nAC:L - On affected hardware the overrun happens deterministically whenever the firmware-reported DPM level count plus the hardcoded DCFCLK STA targets exceeds 8 \u2014 no race to win, no memory layout to groom, and no unlikely precondition. The vulnerable path in dcn302/dcn303 is entirely ungated.\nPR:L - The trigger points (DC hardware init and resume of the DRM device) are reachable in an ordinary unprivileged desktop session via logind-mediated suspend/resume of the GPU, without root in the init namespace. No pre-authentication or remote path exists, so PR:N is not supportable.\nUI:N - The bounding-box update runs automatically during driver hardware init and resume; no victim action such as opening a file or plugging in a display is required.\nS:U - The out-of-bounds read and the resulting corrupted DML bounding box are both entirely within the kernel\u0027s own security authority \u2014 there is no VM, IOMMU, or sandbox boundary crossed.\nC:H - With `num_states` able to reach `DC__VOLTAGE_STATES` (40) against an 8-element `entries[]`, the read runs up to ~1.3 KB past the end of the `struct clk_bw_params` allocation into adjacent slab memory \u2014 far beyond a \"few bytes\" bounded read. Those bytes are copied into `dml.soc.clock_limits[]`, which feeds userspace-observable clock and mode-validation state.\nI:L - There is no out-of-bounds write \u2014 `clock_limits[]` is 40 entries and the index is bounded by that \u2014 but attacker-uncontrolled garbage from adjacent memory is written into the DML soc bounding box and then used to program dispclk/dppclk/dcfclk/socclk, corrupting kernel state that drives real display hardware.\nA:H - Reading past the end of the heap-allocated `clk_bw_params` can fault or oops and reliably trips KASAN, and feeding nonsensical clock/voltage limits into DML can hang or blank the display pipeline. Any such kernel crash or hang is High."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-10-30T12:19:21.278Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/6d8685dd9718e0613f7c64253500874021b9efc9"
            },
            {
              "url": "https://git.kernel.org/stable/c/4003bac784380fed1f94f197350567eaa73a409d"
            },
            {
              "url": "https://git.kernel.org/stable/c/aba188d6f4ebaf52acf13f204db2bd2c22072504"
            },
            {
              "url": "https://git.kernel.org/stable/c/188fd1616ec43033cedbe343b6579e9921e2d898"
            }
          ],
          "title": "drm/amd/display: Fix index may exceed array range within fpu_update_bw_bounding_box",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2024-46811",
        "datePublished": "2024-09-27T12:35:54.445Z",
        "dateReserved": "2024-09-11T15:12:18.283Z",
        "dateUpdated": "2026-10-30T12:19:21.278Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Sightings

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