Answer in brief
CVE-2026-90129 records a Unknown severity vulnerability in virtio_balloon: quiesce balloon work before device shutdown. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=8bd2fa086a04886798b505f28db4002525895203 <6dd28e32f4d81a0d57c732b9900de24184e60a7d || >=8bd2fa086a04886798b505f28db4002525895203 <bdef50a8226fc04899ef6815dd08a002247d47d5 || >=8bd2fa086a04886798b505f28db4002525895203 <7e17eef04600c399c7e0f5ce765da5cf9d40d8e1 || aee42f3d57bfa37b2716df4584edeecf63b9df4c || >=6.14.9 <6.15 | 6dd28e32f4d81a0d57c732b9900de24184e60a7d, bdef50a8226fc04899ef6815dd08a002247d47d5, 7e17eef04600c399c7e0f5ce765da5cf9d40d8e1, 6.15 |
| Linux/Linuxgeneric | 6.15 | Not reported |
| Linux/Linuxgeneric | >=8bd2fa086a04886798b505f28db4002525895203 <6dd28e32f4d81a0d57c732b9900de24184e60a7d || >=8bd2fa086a04886798b505f28db4002525895203 <bdef50a8226fc04899ef6815dd08a002247d47d5 || >=8bd2fa086a04886798b505f28db4002525895203 <7e17eef04600c399c7e0f5ce765da5cf9d40d8e1 || acdfe206be6c70ec55dc8bfdb1a22036d10fae26 || 1eaa83fd94ed5e40d43139025f5acb7bcfed3b5f || aee42f3d57bfa37b2716df4584edeecf63b9df4c || >=6.6.160 <6.7 || >=6.12.114 <6.13 || >=6.14.9 <6.15 | 6dd28e32f4d81a0d57c732b9900de24184e60a7d, bdef50a8226fc04899ef6815dd08a002247d47d5, 7e17eef04600c399c7e0f5ce765da5cf9d40d8e1, 6.7, 6.13, 6.15 |
| Linux/Linuxgeneric | >=8bd2fa086a04886798b505f28db4002525895203 <6dd28e32f4d81a0d57c732b9900de24184e60a7d || >=8bd2fa086a04886798b505f28db4002525895203 <bdef50a8226fc04899ef6815dd08a002247d47d5 || >=8bd2fa086a04886798b505f28db4002525895203 <7e17eef04600c399c7e0f5ce765da5cf9d40d8e1 || 0c03e32494dd0bbcc301523e5ae567c2f567a7d9 || acdfe206be6c70ec55dc8bfdb1a22036d10fae26 || 1eaa83fd94ed5e40d43139025f5acb7bcfed3b5f || aee42f3d57bfa37b2716df4584edeecf63b9df4c || >=6.1.191 <6.2 || >=6.6.160 <6.7 || >=6.12.114 <6.13 || >=6.14.9 <6.15 | 6dd28e32f4d81a0d57c732b9900de24184e60a7d, bdef50a8226fc04899ef6815dd08a002247d47d5, 7e17eef04600c399c7e0f5ce765da5cf9d40d8e1, 6.2, 6.7, 6.13, 6.15 |
Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 17, 2026
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.
Quoted source text, attributed separately from HOL analysis.