FKIE_CVE-2026-90127

Vulnerability from fkie_nvd - Published: 2026-09-17 17:17 - Updated: 2026-09-17 17:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: virtio: rtc: time out alarm requests RTC class operations run with rtc_device.ops_lock held. The virtio RTC alarm requests currently wait without a timeout for the device to return their requestq buffers. On surprise removal, virtio-pci marks the virtqueues broken before unregistering the virtio device. If an alarm request is waiting when the device stops responding, viortc_remove() blocks in viortc_class_stop() while trying to acquire ops_lock. The request cannot complete and device removal hangs until the waiting task is signalled. Use the same 60-second timeout as clock read requests for alarm reads, alarm programming, and alarm interrupt enable requests. The existing message reference counting keeps a timed-out request alive until a late response or device teardown.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/28701b74c22d2a43ddf7aebb6378e60c18323865
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/68e00d9212929805b40dcb9166755610f4f4acee
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/afbf69d1d691c06d093d7c3f17168ecb608c4977
Impacted products
Vendor Product Version
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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/virtio/virtio_rtc_driver.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "28701b74c22d2a43ddf7aebb6378e60c18323865",
              "status": "affected",
              "version": "9d4f22fd563e0cd02e8448e84d057e7c0132a586",
              "versionType": "git"
            },
            {
              "lessThan": "afbf69d1d691c06d093d7c3f17168ecb608c4977",
              "status": "affected",
              "version": "9d4f22fd563e0cd02e8448e84d057e7c0132a586",
              "versionType": "git"
            },
            {
              "lessThan": "68e00d9212929805b40dcb9166755610f4f4acee",
              "status": "affected",
              "version": "9d4f22fd563e0cd02e8448e84d057e7c0132a586",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/virtio/virtio_rtc_driver.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio: rtc: time out alarm requests\n\nRTC class operations run with rtc_device.ops_lock held. The virtio RTC\nalarm requests currently wait without a timeout for the device to return\ntheir requestq buffers.\n\nOn surprise removal, virtio-pci marks the virtqueues broken before\nunregistering the virtio device. If an alarm request is waiting when the\ndevice stops responding, viortc_remove() blocks in viortc_class_stop()\nwhile trying to acquire ops_lock. The request cannot complete and device\nremoval hangs until the waiting task is signalled.\n\nUse the same 60-second timeout as clock read requests for alarm reads,\nalarm programming, and alarm interrupt enable requests. The existing\nmessage reference counting keeps a timed-out request alive until a late\nresponse or device teardown."
    }
  ],
  "id": "CVE-2026-90127",
  "lastModified": "2026-09-17T17:17:05.080",
  "metrics": {},
  "published": "2026-09-17T17:17:05.080",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/28701b74c22d2a43ddf7aebb6378e60c18323865"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/68e00d9212929805b40dcb9166755610f4f4acee"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/afbf69d1d691c06d093d7c3f17168ecb608c4977"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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