CVE-2026-89963 (GCVE-0-2026-89963)
Vulnerability from cvelistv5
Published
2026-09-16 10:32
Modified
2026-10-19 08:55
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: powerpc/kexec_file: Fix null-ptr-def in extra size calculation A static Sashiko AI review identified a potential NULL pointer dereference in kexec_extra_fdt_size_ppc64(). On platforms without any reserved memory regions, get_reserved_memory_ranges() can return 0 while leaving 'rmem' unallocated as NULL. Passing it directly leads to a kernel panic when evaluating 'rmem->nr_ranges'. Add a NULL check for 'rmem' to prevent this crash.
References
Impacted products
Vendor Product Version
Linux Linux Version: 0d3ff067331ef84e7e7f49537d768881042ed5ba
Version: 0d3ff067331ef84e7e7f49537d768881042ed5ba
Version: 0d3ff067331ef84e7e7f49537d768881042ed5ba
Version: 0d3ff067331ef84e7e7f49537d768881042ed5ba
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/powerpc/kexec/file_load_64.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "11ef1c2a5dbe0bd8c1345f59bab7331d352f02cf",
              "status": "affected",
              "version": "0d3ff067331ef84e7e7f49537d768881042ed5ba",
              "versionType": "git"
            },
            {
              "lessThan": "df45337587db21c502fe5251d3bcc7887428f4fb",
              "status": "affected",
              "version": "0d3ff067331ef84e7e7f49537d768881042ed5ba",
              "versionType": "git"
            },
            {
              "lessThan": "4ff3d9fd71c7bc2fc81afdac1970d9c55a5c0dea",
              "status": "affected",
              "version": "0d3ff067331ef84e7e7f49537d768881042ed5ba",
              "versionType": "git"
            },
            {
              "lessThan": "761eda315a6e1fda3e8e2185b28430771fb1ac29",
              "status": "affected",
              "version": "0d3ff067331ef84e7e7f49537d768881042ed5ba",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/powerpc/kexec/file_load_64.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.11"
            },
            {
              "lessThan": "6.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.5",
              "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": "6.12.110",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.51",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.5",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/kexec_file: Fix null-ptr-def in extra size calculation\n\nA static Sashiko AI review identified a potential NULL pointer\ndereference in kexec_extra_fdt_size_ppc64().\n\nOn platforms without any reserved memory regions,\nget_reserved_memory_ranges() can return 0 while leaving \u0027rmem\u0027\nunallocated as NULL. Passing it directly leads to a kernel panic when\nevaluating \u0027rmem-\u003enr_ranges\u0027.\n\nAdd a NULL check for \u0027rmem\u0027 to prevent this crash."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T08:55:36.947Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/11ef1c2a5dbe0bd8c1345f59bab7331d352f02cf"
        },
        {
          "url": "https://git.kernel.org/stable/c/df45337587db21c502fe5251d3bcc7887428f4fb"
        },
        {
          "url": "https://git.kernel.org/stable/c/4ff3d9fd71c7bc2fc81afdac1970d9c55a5c0dea"
        },
        {
          "url": "https://git.kernel.org/stable/c/761eda315a6e1fda3e8e2185b28430771fb1ac29"
        }
      ],
      "title": "powerpc/kexec_file: Fix null-ptr-def in extra size calculation",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89963",
    "datePublished": "2026-09-16T10:32:45.336Z",
    "dateReserved": "2026-09-11T19:38:34.778Z",
    "dateUpdated": "2026-10-19T08:55:36.947Z",
    "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.