CVE-2026-98894 (GCVE-0-2026-98894)

Vulnerability from cvelistv5 – Published: 2026-10-23 11:37 – Updated: 2026-10-23 11:37
VLAI
Title
drm/amd/ras: reset CPER ring on corrupt entry size
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amd/ras: reset CPER ring on corrupt entry size When CPER ring overflow handling advances the read pointer, it trusts the parsed entry size from the current ring contents. Corrupt CPER data can produce an entry size that does not advance rptr after dword conversion and pointer masking. In that case the recovery loop keeps testing the same location while holding the CPER ring mutex. This can hang the worker that is writing the next CPER record. Detect a no-progress rptr update and reset the CPER ring to an empty state instead. This drops the corrupt contents and lets the writer leave the recovery path without spinning.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7061 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < a98d0d49757a113ce17960262b9cd4ccc1420108 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 4d695e66d7027a0c78302e47ac76293675fbbb4d (git)
Affected: 0 , < 6.18.53 (semver)
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Linux Linux Unaffected: 6.18.53 , ≤ 6.18.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
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          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/amdgpu_cper.c"
          ],
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              "versionType": "git"
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            }
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      "cpeApplicability": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.53",
                  "vulnerable": true
                },
                {
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                  "vulnerable": true
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              "negate": false,
              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/ras: reset CPER ring on corrupt entry size\n\nWhen CPER ring overflow handling advances the read pointer, it trusts the\nparsed entry size from the current ring contents. Corrupt CPER data can\nproduce an entry size that does not advance rptr after dword conversion\nand pointer masking.\n\nIn that case the recovery loop keeps testing the same location while\nholding the CPER ring mutex. This can hang the worker that is writing the\nnext CPER record.\n\nDetect a no-progress rptr update and reset the CPER ring to an empty\nstate instead. This drops the corrupt contents and lets the writer leave\nthe recovery path without spinning."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-23T11:37:55.539Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a98d0d49757a113ce17960262b9cd4ccc1420108"
        },
        {
          "url": "https://git.kernel.org/stable/c/4d695e66d7027a0c78302e47ac76293675fbbb4d"
        }
      ],
      "title": "drm/amd/ras: reset CPER ring on corrupt entry size",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98894",
    "datePublished": "2026-10-23T11:37:55.539Z",
    "dateReserved": "2026-09-25T10:25:14.378Z",
    "dateUpdated": "2026-10-23T11:37:55.539Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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  "vulnerability-lookup:meta": {
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      "date": "2026-10-24",
      "epss": "0.00198",
      "percentile": "0.09019"
    },
    "microsoft_vex": {
      "current_release_date": "2026-10-24T01:05:31.000Z",
      "cve": "CVE-2026-98894",
      "id": "msrc_CVE-2026-98894",
      "initial_release_date": "2026-10-24T01:02:03.000Z",
      "product_status:known_affected": "1",
      "product_status:under_investigation": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "drm/amd/ras: reset CPER ring on corrupt entry size",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-98894.json",
      "version": "2"
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    "nvd": {
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            "affectedData": [
              {
                "defaultStatus": "unaffected",
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                ],
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                "defaultStatus": "affected",
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                  "drivers/gpu/drm/amd/amdgpu/amdgpu_cper.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThanOrEqual": "6.18.*",
                    "status": "unaffected",
                    "version": "6.18.53",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "7.2",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/ras: reset CPER ring on corrupt entry size\n\nWhen CPER ring overflow handling advances the read pointer, it trusts the\nparsed entry size from the current ring contents. Corrupt CPER data can\nproduce an entry size that does not advance rptr after dword conversion\nand pointer masking.\n\nIn that case the recovery loop keeps testing the same location while\nholding the CPER ring mutex. This can hang the worker that is writing the\nnext CPER record.\n\nDetect a no-progress rptr update and reset the CPER ring to an empty\nstate instead. This drops the corrupt contents and lets the writer leave\nthe recovery path without spinning."
          }
        ],
        "id": "CVE-2026-98894",
        "lastModified": "2026-10-23T12:18:23.327",
        "metrics": {},
        "published": "2026-10-23T12:18:23.327",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          },
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            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/a98d0d49757a113ce17960262b9cd4ccc1420108"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    }
  }
}



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