Vulnerability-Lookup

GHSA-57QC-5C9V-2JQ5

Vulnerability from github – Published: 2026-09-16 12:30 – Updated: 2026-09-16 12:30

Details

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.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-89963"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-16T11:17:06Z",
    "severity": null
  },
  "details": "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": "GHSA-57qc-5c9v-2jq5",
  "modified": "2026-09-16T12:30:43Z",
  "published": "2026-09-16T12:30:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89963"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/11ef1c2a5dbe0bd8c1345f59bab7331d352f02cf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4ff3d9fd71c7bc2fc81afdac1970d9c55a5c0dea"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/761eda315a6e1fda3e8e2185b28430771fb1ac29"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/df45337587db21c502fe5251d3bcc7887428f4fb"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

Vulnerability from cvelistv5 – Published: 2026-09-16 10:32 – Updated: 2026-09-16 10:32

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

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/11ef1c2a5dbe0bd8c…
https://git.kernel.org/stable/c/df45337587db21c50…
https://git.kernel.org/stable/c/4ff3d9fd71c7bc2fc…
https://git.kernel.org/stable/c/761eda315a6e1fda3…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 0d3ff067331ef84e7e7f49537d768881042ed5ba , < 11ef1c2a5dbe0bd8c1345f59bab7331d352f02cf (git) Affected: 0d3ff067331ef84e7e7f49537d768881042ed5ba , < df45337587db21c502fe5251d3bcc7887428f4fb (git) Affected: 0d3ff067331ef84e7e7f49537d768881042ed5ba , < 4ff3d9fd71c7bc2fc81afdac1970d9c55a5c0dea (git) Affected: 0d3ff067331ef84e7e7f49537d768881042ed5ba , < 761eda315a6e1fda3e8e2185b28430771fb1ac29 (git)
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)

Show details on NVD website

JSON

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-rc1",
              "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-rc1",
                  "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": "2026-09-16T10:32:45.336Z",
        "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": "2026-09-16T10:32:45.336Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

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.

Action not permitted

GHSA-57QC-5C9V-2JQ5

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

Tags

Sightings

Nomenclature

Related by attack behaviour