virtio_input: stop callbacks before unregistering input device
In the Linux kernel, the following vulnerability has been resolved: virtio_input: stop callbacks before unregistering input device virtinput_remove() unregisters the input device before resetting the virtio device. virtinput_recv_events() drops vi->lock around input_event(), so clearing vi->ready does not stop a callback that passed the entry check. It can still use vi->idev, requeue buffers and kick the queue. Reset first, as virtinput_freeze() already does. With the preceding core change, reset waits for callbacks before input_unregister_device() can free vi->idev. Recheck vi->ready after taking the lock again: keep draining completed events so an input packet is not truncated, but stop requeueing buffers and kicking the queue. With evdev attached, input_unregister_handle() currently waits for an RCU grace period, which also waits out IRQ callbacks. This masks the lifetime bug on PCI and MMIO, but does not protect sleepable callbacks on other transports.
CVE-2026-97986
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-2026-97986
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": "271c865161c57cfabca45b93eaa712b19da365bc",
"lessThan": "3ae729b1f8ab81d1244061872db2fb0ebb110d2a",
"versionType": "git"
},
{
"status": "affected",
"version": "271c865161c57cfabca45b93eaa712b19da365bc",
"lessThan": "81073bca2062c916c818f2744fbab545a5c4982b",
"versionType": "git"
},
{
"status": "affected",
"version": "271c865161c57cfabca45b93eaa712b19da365bc",
"lessThan": "8226aeee9b9a94cd699fbb51cb230feff46cfaf2",
"versionType": "git"
},
{
"status": "affected",
"version": "271c865161c57cfabca45b93eaa712b19da365bc",
"lessThan": "a3ba86a270dd87460759214046dc7cbd409ac711",
"versionType": "git"
},
{
"status": "affected",
"version": "271c865161c57cfabca45b93eaa712b19da365bc",
"lessThan": "5378f7945856a5ed88e6f9850bc7a68f54090135",
"versionType": "git"
},
{
"status": "affected",
"version": "271c865161c57cfabca45b93eaa712b19da365bc",
"lessThan": "d7808b37da0a619cf1fa541c2384e783fecc2480",
"versionType": "git"
}
],
"programFiles": [
"drivers/virtio/virtio_input.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.1"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.1",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.111",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.7",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/virtio/virtio_input.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-97986
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38119 · Revision 1
- Added to Heist Feed
- Publisher date