CVE-2026-90127Hinoki check available

Device-removal hang via unbounded RTC alarm waits

Published Sep 17, 2026 · Updated Sep 17, 2026

A missing timeout in Linux 6.16 virtio RTC allows local users to hang device removal during an outstanding alarm request. Alarm operations wait indefinitely for device responses while holding rtc_device.ops_lock, preventing viortc_remove() from acquiring the lock through viortc_class_stop(). The hang requires an outstanding alarm request and a device that stops responding during surprise removal; removal remains blocked until the waiting task is signaled.

CVSS severity2.5
Low
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

A missing timeout in Linux 6.16 virtio RTC allows local users to hang device removal during an outstanding alarm request. Alarm operations wait indefinitely for device responses while holding rtc_device.ops_lock, preventing viortc_remove() from acquiring the lock through viortc_class_stop(). The hang requires an outstanding alarm request and a device that stops responding during surprise removal; removal remains blocked until the waiting task is signaled.

The record

CVE
CVE-2026-90127
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.16
  2. Affected versionversion=9d4f22fd563e0cd02e8448e84d057e7c0132a586 <28701b74c22d2a43ddf7aebb6378e60c18323865
  3. Affected versionversion=9d4f22fd563e0cd02e8448e84d057e7c0132a586 <68e00d9212929805b40dcb9166755610f4f4acee
  4. Affected versionversion=9d4f22fd563e0cd02e8448e84d057e7c0132a586 <afbf69d1d691c06d093d7c3f17168ecb608c4977

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.16; version=9d4f22fd563e0cd02e8448e84d057e7c0132a586 <28701b74c22d2a43ddf7aebb6378e60c18323865; version=9d4f22fd563e0cd02e8448e84d057e7c0132a586 <68e00d9212929805b40dcb9166755610f4f4acee; version=9d4f22fd563e0cd02e8448e84d057e7c0132a586 <afbf69d1d691c06d093d7c3f17168ecb608c4977

Published CVSS scores

2.5SUSECVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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