{"cve":"CVE-2026-74311","nvd":{"published":"2026-08-15T06:22:31.173","modified":"2026-08-17T06:19:25.340","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio: rtc: tear down old virtqueues before restore\n\nvirtio_device_restore() resets the device and restores the negotiated\nfeatures before calling ->restore(). viortc_freeze() intentionally\nleaves the existing virtqueues in place so the alarm queue can still\nwake the system, but viortc_restore() immediately calls\nviortc_init_vqs() without first deleting those old queues.\n\nIf virtqueue reinitialization fails on virtio-pci, the transport error\npath can run vp_del_vqs() against a newly allocated vp_dev->vqs array\nwhile vdev->vqs still contains the old virtqueues. vp_del_vqs() then\nlooks up queue state through the new array and can dereference a NULL\ninfo pointer in vp_del_vq(), crashing the guest kernel during restore.\n\nThis can also happen during a non-faulty reinitialization, when one of\nthe vp_find_vqs_msix() attempts is unsuccessful before a later attempt\nwould succeed.\n\nDelete the stale virtqueues before rebuilding them. If restore fails\nbefore virtio_device_ready(), reuse the remove path to stop the device.\nOnce the device is ready, return errors directly instead of deleting the\nvirtqueues again.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":[],"references":["https://git.kernel.org/stable/c/548d2208455f14e6121404c6e30e997bfe0cd264","https://git.kernel.org/stable/c/79366023aa891ca31376021a7bccff6384ca1ff1","https://git.kernel.org/stable/c/aebebd1e9d70b650fc9e877082e0134edcf511da"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:48:17.459049833+00:00"},"epss":{"cve":"CVE-2026-74311","score":0.00173,"percentile":0.06743,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}