{
  "cveId": "CVE-2026-90129",
  "url": "https://patchblox.com/security/cve/CVE-2026-90129",
  "summary": "CVE-2026-90129 is fixed in 20 products on 1 platform, first by DEBIAN-CVE-2026-90129, released September 23, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "virtio_balloon: quiesce balloon work before device shutdown",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  virtio_balloon: quiesce balloon work before device shutdown  Commit 8bd2fa086a04 (\u0022virtio: break and reset virtio devices on device_shutdown()\u0022) added a generic virtio bus .shutdown handler that breaks and resets every virtio device during device_shutdown(), i.e. on reboot and kexec.  virtio_balloon provides no .shutdown of its own, so that generic path runs while the balloon\u0027s asynchronous work is still armed. Once the device has been broken, virtqueue_add_inbuf() in virtballoon_free_page_report() returns -EIO and trips its WARN_ON_ONCE(). On a kernel booted with panic_on_warn that turns an ordinary reboot, for example a kexec based upgrade, into a fatal panic in the middle of device_shutdown(), so the machine never reaches the new kernel.  Relaxing that single WARN_ON_ONCE() would only hide the symptom: the inflate/deflate and OOM paths do not warn, they call wait_event(vb-\u003Eacked, ...) and would instead block forever on a broken queue that can no longer complete. The device has to be quiesced, not just kept quiet.  Add a .shutdown handler that quiesces the balloon via the shared virtballoon_quiesce() helper while the device is still alive, and only then breaks and resets it via virtio_device_shutdown(). Unlike virtballoon_remove() the balloon workqueue is not destroyed, as shutdown does not free the device and cancel_work_sync() together with stop_update already prevent any further work from being queued.",
  "published": "2026-09-17T17:17:05Z",
  "severity": "important",
  "epss": 0.00206,
  "epssPercentile": 0.10793,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-90129",
  "fixes": [
    {
      "platform": "linux",
      "product": "bpftool6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.54-121.166.amzn2023",
      "fix": "ALAS2023-2026-3192",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3192",
      "released": "2026-11-07T01:06:07Z"
    },
    {
      "platform": "linux",
      "product": "bpftool6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.54-121.166.amzn2023",
      "fix": "ALAS2023-2026-3192",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3192",
      "released": "2026-11-07T01:06:07Z"
    },
    {
      "platform": "linux",
      "product": "kernel-livepatch-6.18.54-121.166",
      "release": "amzn 2023",
      "fixedVersion": "1:1.0-0.amzn2023",
      "fix": "ALAS2023-2026-3192",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3192",
      "released": "2026-11-07T01:06:07Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.54-121.166.amzn2023",
      "fix": "ALAS2023-2026-3192",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3192",
      "released": "2026-11-07T01:06:07Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.54-121.166.amzn2023",
      "fix": "ALAS2023-2026-3192",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3192",
      "released": "2026-11-07T01:06:07Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo-common-aarch64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.54-121.166.amzn2023",
      "fix": "ALAS2023-2026-3192",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3192",
      "released": "2026-11-07T01:06:07Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo-common-x86_64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.54-121.166.amzn2023",
      "fix": "ALAS2023-2026-3192",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3192",
      "released": "2026-11-07T01:06:07Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.54-121.166.amzn2023",
      "fix": "ALAS2023-2026-3192",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3192",
      "released": "2026-11-07T01:06:07Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-headers",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.54-121.166.amzn2023",
      "fix": "ALAS2023-2026-3192",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3192",
      "released": "2026-11-07T01:06:07Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-modules-extra",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.54-121.166.amzn2023",
      "fix": "ALAS2023-2026-3192",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3192",
      "released": "2026-11-07T01:06:07Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-modules-extra-common",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.54-121.166.amzn2023",
      "fix": "ALAS2023-2026-3192",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3192",
      "released": "2026-11-07T01:06:07Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.54-121.166.amzn2023",
      "fix": "ALAS2023-2026-3192",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3192",
      "released": "2026-11-07T01:06:07Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.54-121.166.amzn2023",
      "fix": "ALAS2023-2026-3192",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3192",
      "released": "2026-11-07T01:06:07Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.54-121.166.amzn2023",
      "fix": "ALAS2023-2026-3192",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3192",
      "released": "2026-11-07T01:06:07Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.6-1",
      "fix": "DEBIAN-CVE-2026-90129",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-90129",
      "released": "2026-09-23T19:19:02Z"
    },
    {
      "platform": "linux",
      "product": "microvm-kernel6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.54-121.166.amzn2023",
      "fix": "ALAS2023-2026-3192",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3192",
      "released": "2026-11-07T01:06:07Z"
    },
    {
      "platform": "linux",
      "product": "perf6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.54-121.166.amzn2023",
      "fix": "ALAS2023-2026-3192",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3192",
      "released": "2026-11-07T01:06:07Z"
    },
    {
      "platform": "linux",
      "product": "perf6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.54-121.166.amzn2023",
      "fix": "ALAS2023-2026-3192",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3192",
      "released": "2026-11-07T01:06:07Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.54-121.166.amzn2023",
      "fix": "ALAS2023-2026-3192",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3192",
      "released": "2026-11-07T01:06:07Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.54-121.166.amzn2023",
      "fix": "ALAS2023-2026-3192",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3192",
      "released": "2026-11-07T01:06:07Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}