{
  "cveId": "CVE-2026-89963",
  "url": "https://patchblox.com/security/cve/CVE-2026-89963",
  "summary": "CVE-2026-89963 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-89963, released September 23, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "powerpc/kexec_file: Fix null-ptr-def in extra size calculation",
  "description": "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 \u0027rmem\u0027 unallocated as NULL. Passing it directly leads to a kernel panic when evaluating \u0027rmem-\u003Enr_ranges\u0027.  Add a NULL check for \u0027rmem\u0027 to prevent this crash.",
  "published": "2026-09-16T11:17:06Z",
  "severity": "",
  "epss": 0.00209,
  "epssPercentile": 0.11095,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-89963",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.111-1",
      "fix": "DEBIAN-CVE-2026-89963",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-89963",
      "released": "2026-09-23T19:19:02Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.6-1",
      "fix": "DEBIAN-CVE-2026-89963",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-89963",
      "released": "2026-09-23T19:19:02Z"
    },
    {
      "platform": "linux",
      "product": "linux-6.12",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.12.111-1~deb12u1",
      "fix": "DEBIAN-CVE-2026-89963",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-89963",
      "released": "2026-09-23T19:19:02Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}