CVE-2026-98894

Full vulnerability record from the local CVENow database.

Description

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

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-10-23 12:18:23.327000

Last modified

2026-10-26 07:17:14.640000

View original CVE JSON

{
  "id": "CVE-2026-98894",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-10-23T12:18:23.327",
  "lastModified": "2026-10-26T07:17:14.640",
  "vulnStatus": "Received",
  "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."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/amdgpu_cper.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "4058e7cbfd0fb0cae7cbb8035bb43c593cc7c964",
              "lessThan": "a98d0d49757a113ce17960262b9cd4ccc1420108",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "4058e7cbfd0fb0cae7cbb8035bb43c593cc7c964",
              "lessThan": "4d695e66d7027a0c78302e47ac76293675fbbb4d",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/amdgpu_cper.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "6.15",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "6.15",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.53",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/4d695e66d7027a0c78302e47ac76293675fbbb4d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a98d0d49757a113ce17960262b9cd4ccc1420108",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}