virtio: rtc: time out alarm requests
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.
CVE-2026-90127
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-90127
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "9d4f22fd563e0cd02e8448e84d057e7c0132a586",
"lessThan": "28701b74c22d2a43ddf7aebb6378e60c18323865",
"versionType": "git"
},
{
"status": "affected",
"version": "9d4f22fd563e0cd02e8448e84d057e7c0132a586",
"lessThan": "afbf69d1d691c06d093d7c3f17168ecb608c4977",
"versionType": "git"
},
{
"status": "affected",
"version": "9d4f22fd563e0cd02e8448e84d057e7c0132a586",
"lessThan": "68e00d9212929805b40dcb9166755610f4f4acee",
"versionType": "git"
}
],
"programFiles": [
"drivers/virtio/virtio_rtc_driver.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.16"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.16",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/virtio/virtio_rtc_driver.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90127
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #36529 · Revision 1
- Added to Heist Feed
- Publisher date