virtio_balloon: quiesce balloon work before device shutdown
In the Linux kernel, the following vulnerability has been resolved: virtio_balloon: quiesce balloon work before device shutdown Commit 8bd2fa086a04 ("virtio: break and reset virtio devices on device_shutdown()") added a generic virtio bus .shutdown handler that breaks and resets every virtio device during device_shutdown(), i.e. on reboot and kexec. virtio_balloon provides no .shutdown of its own, so that generic path runs while the balloon's asynchronous work is still armed. Once the device has been broken, virtqueue_add_inbuf() in virtballoon_free_page_report() returns -EIO and trips its WARN_ON_ONCE(). On a kernel booted with panic_on_warn that turns an ordinary reboot, for example a kexec based upgrade, into a fatal panic in the middle of device_shutdown(), so the machine never reaches the new kernel. Relaxing that single WARN_ON_ONCE() would only hide the symptom: the inflate/deflate and OOM paths do not warn, they call wait_event(vb->acked, ...) and would instead block forever on a broken queue that can no longer complete. The device has to be quiesced, not just kept quiet. Add a .shutdown handler that quiesces the balloon via the shared virtballoon_quiesce() helper while the device is still alive, and only then breaks and resets it via virtio_device_shutdown(). Unlike virtballoon_remove() the balloon workqueue is not destroyed, as shutdown does not free the device and cancel_work_sync() together with stop_update already prevent any further work from being queued.
CVE-2026-90129
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-2026-90129
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": "8bd2fa086a04886798b505f28db4002525895203",
"lessThan": "6dd28e32f4d81a0d57c732b9900de24184e60a7d",
"versionType": "git"
},
{
"status": "affected",
"version": "8bd2fa086a04886798b505f28db4002525895203",
"lessThan": "bdef50a8226fc04899ef6815dd08a002247d47d5",
"versionType": "git"
},
{
"status": "affected",
"version": "8bd2fa086a04886798b505f28db4002525895203",
"lessThan": "7e17eef04600c399c7e0f5ce765da5cf9d40d8e1",
"versionType": "git"
},
{
"status": "affected",
"version": "acdfe206be6c70ec55dc8bfdb1a22036d10fae26",
"versionType": "git"
},
{
"status": "affected",
"version": "1eaa83fd94ed5e40d43139025f5acb7bcfed3b5f",
"versionType": "git"
},
{
"status": "affected",
"version": "aee42f3d57bfa37b2716df4584edeecf63b9df4c",
"versionType": "git"
},
{
"status": "affected",
"version": "6.6.160",
"lessThan": "6.7",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.12.114",
"lessThan": "6.13",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.14.9",
"lessThan": "6.15",
"versionType": "semver"
}
],
"programFiles": [
"drivers/virtio/virtio_balloon.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.15"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.15",
"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_balloon.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90129
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48609 · Revision 1
- Added to Heist Feed
- Publisher date