KVM: x86: Nullify irqfd->producer if updating IRTE for bypass fails

{
  "id": "b4b648a0df2d97a9ef92e2173210b136de32c89dea252ede0cc05d36737d9fbc",
  "url": "https://osv.dev/vulnerability/CVE-2026-72283",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "KVM: x86: Nullify irqfd->producer if updating IRTE for bypass fails",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Nullify irqfd->producer if updating IRTE for bypass fails Nullify irqfd->producer if updating the IRTE for bypass fails, as leaving a dangling pointer will result in a use-after-free if the irqfd is reachable through KVM's routing, but the producer is freed separately. E.g. for VFIO PCI, the producer is embedded in struct \"vfio_pci_irq_ctx\" and freed when the vector is disabled, which can happen independent of routing updates. [sean: drop PPC change, massage changelog]",
    "evidence": "osv:CVE-2026-72283",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.40",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-72283",
      "aliases": [
        "CVE-2026-72283"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "77e1b8332d1d7aa786f7515e9bd4055def6a1e06"
                },
                {
                  "fixed": "d1379888cc4230bac647ec24ab83306afbd03e88"
                },
                {
                  "fixed": "d5560b6569cd05ba72c6b33427fbabc6ec46b8cf"
                },
                {
                  "fixed": "ed446e8aa894883c08892cfee69782fdf8f6c3ca"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72283.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.17.0"
                },
                {
                  "fixed": "6.18.40"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.1.5"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72283.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:29.820259720Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/d1379888cc4230bac647ec24ab83306afbd03e88",
        "https://git.kernel.org/stable/c/d5560b6569cd05ba72c6b33427fbabc6ec46b8cf",
        "https://git.kernel.org/stable/c/ed446e8aa894883c08892cfee69782fdf8f6c3ca",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72283.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-72283",
        "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/2026/72xxx/CVE-2026-72283.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-72283",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 496819,
  "published_at": "2026-08-15T05:55:06.959+00:00"
}