{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "d4d5587182664b0c4ab6d3556ce881cb975507c2"
            },
            {
              "fixed": "41bb8748124d0d8ee5d8e1eace9dfbc874bc9564"
            },
            {
              "fixed": "9f7007ee9858c99aa43101bc8352c672fee85644"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "7.1.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80693.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nidpf: bound interrupt-vector register fill to the allocated array\n\nidpf_get_reg_intr_vecs() fills the caller-allocated reg_vals[] array from\nthe VIRTCHNL2_OP_ALLOC_VECTORS reply in adapter-\u003ereq_vec_chunks, bounding\nits inner loop only by the per-chunk num_vectors. The array is sized\nseparately: idpf_intr_reg_init() allocates\nkzalloc_objs(struct idpf_vec_regs, total_vecs) from\ncaps.num_allocated_vectors and only checks the returned count after the\nfill. The sum of per-chunk num_vectors is never reconciled against\ntotal_vecs, so a reply with a small num_allocated_vectors but chunks\nsumming higher writes past the end of reg_vals[].\n\nImpact: a control plane (a PF or hypervisor device model) that returns a\nVIRTCHNL2_OP_ALLOC_VECTORS reply whose per-chunk num_vectors sum exceeds\nnum_allocated_vectors writes struct idpf_vec_regs entries past the end of\nthe reg_vals kmalloc allocation (KASAN slab-out-of-bounds write).\n\nBound the fill loop to the array capacity passed in by the callers,\nmirroring the sibling idpf_vport_get_q_reg(). The existing\nnum_regs \u003c num_vecs check then rejects an undersized reply without the\nout-of-bounds write happening first.",
  "id": "CVE-2026-80693",
  "modified": "2026-08-31T03:30:48.512892695Z",
  "published": "2026-08-28T06:52:56.131Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/41bb8748124d0d8ee5d8e1eace9dfbc874bc9564"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9f7007ee9858c99aa43101bc8352c672fee85644"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80693.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80693"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "idpf: bound interrupt-vector register fill to the allocated array"
}