CVE-2026-90127 (GCVE-0-2026-90127)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:06 – Updated: 2026-09-17 16:06
VLAI
Title
virtio: rtc: time out alarm requests
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 9d4f22fd563e0cd02e8448e84d057e7c0132a586 , < 28701b74c22d2a43ddf7aebb6378e60c18323865 (git)
Affected: 9d4f22fd563e0cd02e8448e84d057e7c0132a586 , < afbf69d1d691c06d093d7c3f17168ecb608c4977 (git)
Affected: 9d4f22fd563e0cd02e8448e84d057e7c0132a586 , < 68e00d9212929805b40dcb9166755610f4f4acee (git)
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Linux Linux Affected: 6.16
Unaffected: 0 , < 6.16 (semver)
Unaffected: 6.18.52 , ≤ 6.18.* (semver)
Unaffected: 7.2.6 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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          "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."
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    "dateReserved": "2026-09-11T19:38:34.788Z",
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          }
        ],
        "id": "CVE-2026-90127",
        "lastModified": "2026-09-17T17:17:05.080",
        "metrics": {},
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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