octeontx2-af: fix out-of-bounds read setting MSI-X irq affinity

{
  "id": "863055706d085054f287f0364d254081e9a2309c761d9e4b88c2207eb8347484",
  "url": "https://osv.dev/vulnerability/CVE-2026-93246",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "octeontx2-af: fix out-of-bounds read setting MSI-X irq affinity",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: octeontx2-af: fix out-of-bounds read setting MSI-X irq affinity rvu_register_interrupts() walks every MSI-X vector and uses strstr() to match \"Mbox\" or \"FLR\" in irq_name before pinning those interrupts to CPU 0. irq_name is a per-vector NAME_SIZE buffer, but not every slot is populated before this loop runs. strstr() keeps scanning until it finds a NUL terminator, so an uninitialized slot can trigger a KASAN slab-out-of-bounds read at boot when debug options are enabled. Use strnstr() with NAME_SIZE to bound the search within each vector's name buffer.",
    "evidence": "osv:CVE-2026-93246",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "7.2.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-93246",
      "aliases": [
        "CVE-2026-93246"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "4e527f1e5c155ce28164ba34cad47b635d16f827"
                },
                {
                  "fixed": "2f460aa0211e97c011ef0cfe5016f8f2a2ed059b"
                },
                {
                  "fixed": "4d5df98369c5f45710b786499f8bd7ffc3196433"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93246.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "7.1.0"
                },
                {
                  "fixed": "7.2.6"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93246.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:42.999869184Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/2f460aa0211e97c011ef0cfe5016f8f2a2ed059b",
        "https://git.kernel.org/stable/c/4d5df98369c5f45710b786499f8bd7ffc3196433",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93246.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-93246",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93246.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-93246",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 511011,
  "published_at": "2026-09-24T15:51:03.587+00:00"
}