powerpc/xive: propagate IPI init errors to prevent use-after-free

{
  "id": "c867641bdcb991cc0c88441de2dbe0c2aeeaebe9657c3007bf0925750d615a4d",
  "url": "https://osv.dev/vulnerability/CVE-2026-93260",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "powerpc/xive: propagate IPI init errors to prevent use-after-free",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: powerpc/xive: propagate IPI init errors to prevent use-after-free When xive_init_ipis() fails (e.g. irq_domain_alloc_irqs() fails), the error path frees the global xive_ipis array. However, xive_smp_probe() previously ignored this failure and proceeded to call xive_setup_cpu_ipi(), which dereferences the already-freed xive_ipis pointer -- a use-after-free. Now that xive_smp_probe() returns int (previous patch), propagate the error from xive_init_ipis() and xive_setup_cpu_ipi() through xive_smp_probe(). Check the return value in both pnv_smp_probe() and pSeries_smp_probe() so that IPI setup is aborted cleanly on failure, avoiding the use-after-free.",
    "evidence": "osv:CVE-2026-93260",
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    "severity": "high",
    "structured": {
      "id": "CVE-2026-93260",
      "aliases": [
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      "metrics": [
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          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
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      "modified": "2026-11-01T02:30:20.918204815Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/2ea6238343691309e68308131c7e80c3ae05afea",
        "https://git.kernel.org/stable/c/411a3c016e7a95f5fa105a0587e07d0647a77727",
        "https://git.kernel.org/stable/c/5c9ab0c9cede9f149733d330e2d7d45341b71359",
        "https://git.kernel.org/stable/c/89e1caa5b0aafe23e9938d9a311e9d41baee583e",
        "https://git.kernel.org/stable/c/c554a8d376d5aea1b237ed6bef6f9fbfc550e67f",
        "https://git.kernel.org/stable/c/e36b1c2eafcaaddefa70d55e6fda74cf6cda38af",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93260.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-93260",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
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      "provider_metadata": {
        "cna_assigner": "Linux",
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
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  "source_id": "core-osv",
  "document_id": 509715,
  "published_at": "2026-09-24T15:51:46.703+00:00"
}