CVE-2026-98476 (GCVE-0-2026-98476)
Vulnerability from cvelistv5
Published
2026-10-18 15:15
Modified
2026-10-19 09:20
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: s390/cio: Fix NULL pointer dereference in ccw_device_get_util_str() The channel path registry entry associated with a CHPID may be removed while the subchannel's PMCW still references that CHPID. In this case, chpid_to_chp() can return NULL, leading to a NULL pointer dereference. Add the missing NULL check before dereferencing the returned pointer.
References
Impacted products
Vendor Product Version
Linux Linux Version: 199652309a4d6635fca19d7528d73ab9e219bd9a
Version: 199652309a4d6635fca19d7528d73ab9e219bd9a
Version: 199652309a4d6635fca19d7528d73ab9e219bd9a
Version: 199652309a4d6635fca19d7528d73ab9e219bd9a
Version: 199652309a4d6635fca19d7528d73ab9e219bd9a
Version: 199652309a4d6635fca19d7528d73ab9e219bd9a
Version: 199652309a4d6635fca19d7528d73ab9e219bd9a
Version: 199652309a4d6635fca19d7528d73ab9e219bd9a
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/s390/cio/device_ops.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "9d8b21820caed9128945fffcedf03e2a4c21eee2",
              "status": "affected",
              "version": "199652309a4d6635fca19d7528d73ab9e219bd9a",
              "versionType": "git"
            },
            {
              "lessThan": "5fc54e04dad90b15d0430118b3f288a1d64e66c9",
              "status": "affected",
              "version": "199652309a4d6635fca19d7528d73ab9e219bd9a",
              "versionType": "git"
            },
            {
              "lessThan": "27e396a89f76f742abdbe9f8c4a58a6e806fdf59",
              "status": "affected",
              "version": "199652309a4d6635fca19d7528d73ab9e219bd9a",
              "versionType": "git"
            },
            {
              "lessThan": "dbf30e661ceb9a52c94c85719716391dcc29142a",
              "status": "affected",
              "version": "199652309a4d6635fca19d7528d73ab9e219bd9a",
              "versionType": "git"
            },
            {
              "lessThan": "5e006ac90a4d331db1dd712b91fec849b45ffc01",
              "status": "affected",
              "version": "199652309a4d6635fca19d7528d73ab9e219bd9a",
              "versionType": "git"
            },
            {
              "lessThan": "c3bbcb32deecc06ebb1762398399b566d5ff2fc9",
              "status": "affected",
              "version": "199652309a4d6635fca19d7528d73ab9e219bd9a",
              "versionType": "git"
            },
            {
              "lessThan": "44b16b02608058fc72198ac0205969f0f43065df",
              "status": "affected",
              "version": "199652309a4d6635fca19d7528d73ab9e219bd9a",
              "versionType": "git"
            },
            {
              "lessThan": "5b76268dac968612f7283d59b539036de955b7d9",
              "status": "affected",
              "version": "199652309a4d6635fca19d7528d73ab9e219bd9a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/s390/cio/device_ops.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.18"
            },
            {
              "lessThan": "4.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.271",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.55",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.9",
              "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": "5.10.271",
                  "versionStartIncluding": "4.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.222",
                  "versionStartIncluding": "4.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.189",
                  "versionStartIncluding": "4.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.158",
                  "versionStartIncluding": "4.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.112",
                  "versionStartIncluding": "4.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.55",
                  "versionStartIncluding": "4.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.9",
                  "versionStartIncluding": "4.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "4.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/cio: Fix NULL pointer dereference in ccw_device_get_util_str()\n\nThe channel path registry entry associated with a CHPID may be removed\nwhile the subchannel\u0027s PMCW still references that CHPID. In this case,\nchpid_to_chp() can return NULL, leading to a NULL pointer dereference.\n\nAdd the missing NULL check before dereferencing the returned pointer."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:20:13.920Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/9d8b21820caed9128945fffcedf03e2a4c21eee2"
        },
        {
          "url": "https://git.kernel.org/stable/c/5fc54e04dad90b15d0430118b3f288a1d64e66c9"
        },
        {
          "url": "https://git.kernel.org/stable/c/27e396a89f76f742abdbe9f8c4a58a6e806fdf59"
        },
        {
          "url": "https://git.kernel.org/stable/c/dbf30e661ceb9a52c94c85719716391dcc29142a"
        },
        {
          "url": "https://git.kernel.org/stable/c/5e006ac90a4d331db1dd712b91fec849b45ffc01"
        },
        {
          "url": "https://git.kernel.org/stable/c/c3bbcb32deecc06ebb1762398399b566d5ff2fc9"
        },
        {
          "url": "https://git.kernel.org/stable/c/44b16b02608058fc72198ac0205969f0f43065df"
        },
        {
          "url": "https://git.kernel.org/stable/c/5b76268dac968612f7283d59b539036de955b7d9"
        }
      ],
      "title": "s390/cio: Fix NULL pointer dereference in ccw_device_get_util_str()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98476",
    "datePublished": "2026-10-18T15:15:45.100Z",
    "dateReserved": "2026-09-25T10:25:14.351Z",
    "dateUpdated": "2026-10-19T09:20:13.920Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.