CVE-2026-89963 (GCVE-0-2026-89963)

Vulnerability from cvelistv5 – Published: 2026-09-16 10:32 – Updated: 2026-09-16 10:32
VLAI
Title
powerpc/kexec_file: Fix null-ptr-def in extra size calculation
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 0d3ff067331ef84e7e7f49537d768881042ed5ba , < 11ef1c2a5dbe0bd8c1345f59bab7331d352f02cf (git)
Affected: 0d3ff067331ef84e7e7f49537d768881042ed5ba , < df45337587db21c502fe5251d3bcc7887428f4fb (git)
Affected: 0d3ff067331ef84e7e7f49537d768881042ed5ba , < 4ff3d9fd71c7bc2fc81afdac1970d9c55a5c0dea (git)
Affected: 0d3ff067331ef84e7e7f49537d768881042ed5ba , < 761eda315a6e1fda3e8e2185b28430771fb1ac29 (git)
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Linux Linux Affected: 6.11
Unaffected: 0 , < 6.11 (semver)
Unaffected: 6.12.110 , ≤ 6.12.* (semver)
Unaffected: 6.18.51 , ≤ 6.18.* (semver)
Unaffected: 7.2.5 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/powerpc/kexec/file_load_64.c"
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      "cpeApplicability": [
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              "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": "2026-09-16T10:32:45.336Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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      "title": "powerpc/kexec_file: Fix null-ptr-def in extra size calculation",
      "x_generator": {
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89963",
    "datePublished": "2026-09-16T10:32:45.336Z",
    "dateReserved": "2026-09-11T19:38:34.778Z",
    "dateUpdated": "2026-09-16T10:32:45.336Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
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      "date": "2026-09-25",
      "epss": "0.00209",
      "percentile": "0.09821"
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        "cveTags": [],
        "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."
          }
        ],
        "id": "CVE-2026-89963",
        "lastModified": "2026-09-16T11:17:06.807",
        "metrics": {},
        "published": "2026-09-16T11:17:06.807",
        "references": [
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            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.