{"id":"CVE-2026-90129","state":"PUBLISHED","title":"virtio_balloon: quiesce balloon work before device shutdown","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio_balloon: quiesce balloon work before device shutdown\n\nCommit 8bd2fa086a04 (\"virtio: break and reset virtio devices on\ndevice_shutdown()\") added a generic virtio bus .shutdown handler that\nbreaks and resets every virtio device during device_shutdown(), i.e. on\nreboot and kexec.\n\nvirtio_balloon provides no .shutdown of its own, so that generic path\nruns while the balloon's asynchronous work is still armed. Once the\ndevice has been broken, virtqueue_add_inbuf() in\nvirtballoon_free_page_report() returns -EIO and trips its\nWARN_ON_ONCE(). On a kernel booted with panic_on_warn that turns an\nordinary reboot, for example a kexec based upgrade, into a fatal panic\nin the middle of device_shutdown(), so the machine never reaches the\nnew kernel.\n\nRelaxing that single WARN_ON_ONCE() would only hide the symptom: the\ninflate/deflate and OOM paths do not warn, they call\nwait_event(vb->acked, ...) and would instead block forever on a broken\nqueue that can no longer complete. The device has to be quiesced, not\njust kept quiet.\n\nAdd a .shutdown handler that quiesces the balloon via the shared\nvirtballoon_quiesce() helper while the device is still alive, and only\nthen breaks and resets it via virtio_device_shutdown(). Unlike\nvirtballoon_remove() the balloon workqueue is not destroyed, as shutdown\ndoes not free the device and cancel_work_sync() together with stop_update\nalready prevent any further work from being queued.","publishedAt":"2026-09-17T16:06:30.537Z","updatedAt":"2026-10-30T12:34:17.423Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8bd2fa086a04886798b505f28db4002525895203","status":"affected","lessThan":"6dd28e32f4d81a0d57c732b9900de24184e60a7d","versionType":"git"},{"version":"8bd2fa086a04886798b505f28db4002525895203","status":"affected","lessThan":"bdef50a8226fc04899ef6815dd08a002247d47d5","versionType":"git"},{"version":"8bd2fa086a04886798b505f28db4002525895203","status":"affected","lessThan":"7e17eef04600c399c7e0f5ce765da5cf9d40d8e1","versionType":"git"},{"version":"0c03e32494dd0bbcc301523e5ae567c2f567a7d9","status":"affected","versionType":"git"},{"version":"acdfe206be6c70ec55dc8bfdb1a22036d10fae26","status":"affected","versionType":"git"},{"version":"1eaa83fd94ed5e40d43139025f5acb7bcfed3b5f","status":"affected","versionType":"git"},{"version":"aee42f3d57bfa37b2716df4584edeecf63b9df4c","status":"affected","versionType":"git"},{"version":"6.1.191","status":"affected","lessThan":"6.2","versionType":"semver"},{"version":"6.6.160","status":"affected","lessThan":"6.7","versionType":"semver"},{"version":"6.12.114","status":"affected","lessThan":"6.13","versionType":"semver"},{"version":"6.14.9","status":"affected","lessThan":"6.15","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/virtio/virtio_balloon.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.15","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/virtio/virtio_balloon.c"]}],"references":["https://git.kernel.org/stable/c/6dd28e32f4d81a0d57c732b9900de24184e60a7d","https://git.kernel.org/stable/c/bdef50a8226fc04899ef6815dd08a002247d47d5","https://git.kernel.org/stable/c/7e17eef04600c399c7e0f5ce765da5cf9d40d8e1"],"weaknesses":[],"ingestedAt":"2026-10-30T12:52:04.348Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/90xxx/CVE-2026-90129.json","commit":"1f312381e38164a43607eebab851b151dd16861e","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90129","state":"PUBLISHED","datePublished":"2026-09-17T16:06:30.537Z","dateUpdated":"2026-10-30T12:34:17.423Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.788Z"},"containers":{"cna":{"title":"virtio_balloon: quiesce balloon work before device shutdown","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio_balloon: quiesce balloon work before device shutdown\n\nCommit 8bd2fa086a04 (\"virtio: break and reset virtio devices on\ndevice_shutdown()\") added a generic virtio bus .shutdown handler that\nbreaks and resets every virtio device during device_shutdown(), i.e. on\nreboot and kexec.\n\nvirtio_balloon provides no .shutdown of its own, so that generic path\nruns while the balloon's asynchronous work is still armed. Once the\ndevice has been broken, virtqueue_add_inbuf() in\nvirtballoon_free_page_report() returns -EIO and trips its\nWARN_ON_ONCE(). On a kernel booted with panic_on_warn that turns an\nordinary reboot, for example a kexec based upgrade, into a fatal panic\nin the middle of device_shutdown(), so the machine never reaches the\nnew kernel.\n\nRelaxing that single WARN_ON_ONCE() would only hide the symptom: the\ninflate/deflate and OOM paths do not warn, they call\nwait_event(vb->acked, ...) and would instead block forever on a broken\nqueue that can no longer complete. The device has to be quiesced, not\njust kept quiet.\n\nAdd a .shutdown handler that quiesces the balloon via the shared\nvirtballoon_quiesce() helper while the device is still alive, and only\nthen breaks and resets it via virtio_device_shutdown(). Unlike\nvirtballoon_remove() the balloon workqueue is not destroyed, as shutdown\ndoes not free the device and cancel_work_sync() together with stop_update\nalready prevent any further work from being queued."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8bd2fa086a04886798b505f28db4002525895203","status":"affected","lessThan":"6dd28e32f4d81a0d57c732b9900de24184e60a7d","versionType":"git"},{"version":"8bd2fa086a04886798b505f28db4002525895203","status":"affected","lessThan":"bdef50a8226fc04899ef6815dd08a002247d47d5","versionType":"git"},{"version":"8bd2fa086a04886798b505f28db4002525895203","status":"affected","lessThan":"7e17eef04600c399c7e0f5ce765da5cf9d40d8e1","versionType":"git"},{"version":"0c03e32494dd0bbcc301523e5ae567c2f567a7d9","status":"affected","versionType":"git"},{"version":"acdfe206be6c70ec55dc8bfdb1a22036d10fae26","status":"affected","versionType":"git"},{"version":"1eaa83fd94ed5e40d43139025f5acb7bcfed3b5f","status":"affected","versionType":"git"},{"version":"aee42f3d57bfa37b2716df4584edeecf63b9df4c","status":"affected","versionType":"git"},{"version":"6.1.191","status":"affected","lessThan":"6.2","versionType":"semver"},{"version":"6.6.160","status":"affected","lessThan":"6.7","versionType":"semver"},{"version":"6.12.114","status":"affected","lessThan":"6.13","versionType":"semver"},{"version":"6.14.9","status":"affected","lessThan":"6.15","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/virtio/virtio_balloon.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.15","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/virtio/virtio_balloon.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/6dd28e32f4d81a0d57c732b9900de24184e60a7d"},{"url":"https://git.kernel.org/stable/c/bdef50a8226fc04899ef6815dd08a002247d47d5"},{"url":"https://git.kernel.org/stable/c/7e17eef04600c399c7e0f5ce765da5cf9d40d8e1"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:34:17.423Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"7.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12.114"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.14.9"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}