HighFix available

KVM: x86: Reset IRTE to host control if new route isn't postable

Type: advisorySources: OSV

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Reset IRTE to host control if *new* route isn't postable Restore an IRTE back to host control (remapped or posted MSI mode) if the *new* GSI route prevents posting the IRQ directly to a vCPU, regardless of the GSI routing type. Updating the IRTE if and only if the new GSI is an MSI results in KVM leaving an IRTE posting to a vCPU. The dangling IRTE can result in interrupts being incorrectly delivered to the guest, and in the worst case scenario can result in use-after-free, e.g. if the VM is torn down, but the underlying host IRQ isn't freed.

Products: Kernel
Affected versions: Not specified
Fixed versions: 5.10.237, 5.15.181, 6.1.136, 6.12.26, 6.14.5, 6.6.89
CVEs: CVE-2025-37885
Confirmed fixed CVEs: Not specified
Updated in this feed: 3 Nov 2026, 03:35 UTC · Revision 1

Source evidence

KVM: x86: Reset IRTE to host control if new route isn't postable

core-osv · Original source

Published 9 May 2025, 06:45 UTC

osv:CVE-2025-37885

Kernel

Fixed versions: 5.10.237, 5.15.181, 6.1.136, 6.6.89, 6.12.26, 6.14.5

Complete source record

{
  "id": "b2e250d57301f5076be383317249022d540bf4cb373cadc4bb43cba6eaf0d7ef",
  "url": "https://osv.dev/vulnerability/CVE-2025-37885",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "KVM: x86: Reset IRTE to host control if *new* route isn't postable",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Reset IRTE to host control if *new* route isn't postable Restore an IRTE back to host control (remapped or posted MSI mode) if the *new* GSI route prevents posting the IRQ directly to a vCPU, regardless of the GSI routing type. Updating the IRTE if and only if the new GSI is an MSI results in KVM leaving an IRTE posting to a vCPU. The dangling IRTE can result in interrupts being incorrectly delivered to the guest, and in the worst case scenario can result in use-after-free, e.g. if the VM is torn down, but the underlying host IRQ isn't freed.",
    "evidence": "osv:CVE-2025-37885",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.237",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.181",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.136",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.89",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.26",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.14.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-37885",
      "aliases": [
        "CVE-2025-37885"
      ],
      "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": [
        {
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                {
                  "fixed": "116c7d35b8f72eac383b9fd371d7c1a8ffc2968b"
                },
                {
                  "fixed": "023816bd5fa46fab94d1e7917fe131b79ed1fb41"
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                {
                  "fixed": "3481fd96d801715942b6f69fe251133128156f30"
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                {
                  "fixed": "b5de7ac74f69603ad803c524b840bffd36368fc3"
                },
                {
                  "fixed": "3066ec21d1a33896125747f68638725f456308db"
                },
                {
                  "fixed": "9bcac97dc42d2f4da8229d18feb0fe2b1ce523a2"
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              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-37885.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "4.4.0"
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                  "introduced": "5.16.0"
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                  "fixed": "6.1.136"
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            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.89"
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              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.26"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
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                {
                  "fixed": "6.14.5"
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-37885.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:25.677290595Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/023816bd5fa46fab94d1e7917fe131b79ed1fb41",
        "https://git.kernel.org/stable/c/116c7d35b8f72eac383b9fd371d7c1a8ffc2968b",
        "https://git.kernel.org/stable/c/3066ec21d1a33896125747f68638725f456308db",
        "https://git.kernel.org/stable/c/3481fd96d801715942b6f69fe251133128156f30",
        "https://git.kernel.org/stable/c/9bcac97dc42d2f4da8229d18feb0fe2b1ce523a2",
        "https://git.kernel.org/stable/c/b5de7ac74f69603ad803c524b840bffd36368fc3",
        "https://git.kernel.org/stable/c/e5f2dee9f7fcd2ff4b97869f3c66a0d89c167769",
        "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html",
        "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/37xxx/CVE-2025-37885.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-37885",
        "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/2025/37xxx/CVE-2025-37885.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-37885",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 492220,
  "published_at": "2025-05-09T06:45:48.15+00:00"
}