CVE-2026-98146 (GCVE-0-2026-98146)
Vulnerability from cvelistv5
Published
2026-09-25 10:36
Modified
2026-10-19 09:14
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: accel/amdxdna: Remove __counted_by from struct amdxdna_cmd_chain struct amdxdna_cmd_chain contains a flexible array annotated with __counted_by(command_count). Since the structure is stored in shared AMDXDNA_BO_SHARE memory, userspace can modify command_count concurrently. If command_count is changed to zero, the bounds check generated from __counted_by may fail and trigger a kernel panic. Remove __counted_by to avoid relying on the userspace-controlled command_count for the flexible array bounds check.
References
Impacted products
Vendor Product Version
Linux Linux Version: aac243092b707bb3018e951d470cc1a9bcbaba6c
Version: aac243092b707bb3018e951d470cc1a9bcbaba6c
Version: aac243092b707bb3018e951d470cc1a9bcbaba6c
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/accel/amdxdna/amdxdna_ctx.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "93fa3e925b15b0ded0a549fe7f12bfbb1c4e171a",
              "status": "affected",
              "version": "aac243092b707bb3018e951d470cc1a9bcbaba6c",
              "versionType": "git"
            },
            {
              "lessThan": "52f3e086760a9a3e02a46a10b57caffd73b1c204",
              "status": "affected",
              "version": "aac243092b707bb3018e951d470cc1a9bcbaba6c",
              "versionType": "git"
            },
            {
              "lessThan": "b3709d354545e70388177500761f92d906c4dfd6",
              "status": "affected",
              "version": "aac243092b707bb3018e951d470cc1a9bcbaba6c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/accel/amdxdna/amdxdna_ctx.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.14"
            },
            {
              "lessThan": "6.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.53",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.7",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naccel/amdxdna: Remove __counted_by from struct amdxdna_cmd_chain\n\nstruct amdxdna_cmd_chain contains a flexible array annotated with\n__counted_by(command_count). Since the structure is stored in shared\nAMDXDNA_BO_SHARE memory, userspace can modify command_count concurrently.\nIf command_count is changed to zero, the bounds check generated from\n__counted_by may fail and trigger a kernel panic.\n\nRemove __counted_by to avoid relying on the userspace-controlled\ncommand_count for the flexible array bounds check."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:14:39.513Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/93fa3e925b15b0ded0a549fe7f12bfbb1c4e171a"
        },
        {
          "url": "https://git.kernel.org/stable/c/52f3e086760a9a3e02a46a10b57caffd73b1c204"
        },
        {
          "url": "https://git.kernel.org/stable/c/b3709d354545e70388177500761f92d906c4dfd6"
        }
      ],
      "title": "accel/amdxdna: Remove __counted_by from struct amdxdna_cmd_chain",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98146",
    "datePublished": "2026-09-25T10:36:20.303Z",
    "dateReserved": "2026-09-25T10:25:14.320Z",
    "dateUpdated": "2026-10-19T09:14:39.513Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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