CVE-2026-74311

CVE CVE-2026-74311EUVD EUVD-2026-59458Published 2026-08-15T05:58:10.000ZLast changed 2026-08-17T05:45:43.000ZCVSS 7.8

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: virtio: rtc: tear down old virtqueues before restore virtio_device_restore() resets the device and restores the negotiated features before calling ->restore(). viortc_freeze() intentionally leaves the existing virtqueues in place so the alarm queue can still wake the system, but viortc_restore() immediately calls viortc_init_vqs() without first deleting those old queues. If virtqueue reinitialization fails on virtio-pci, the transport error path can run vp_del_vqs() against a newly allocated vp_dev->vqs array while vdev->vqs still contains the old virtqueues. vp_del_vqs() then looks up queue state through the new array and can dereference a NULL info pointer in vp_del_vq(), crashing the guest kernel during restore. This can also happen during a non-faulty reinitialization, when one of the vp_find_vqs_msix() attempts is unsuccessful before a later attempt would succeed. Delete the stale virtqueues before rebuilding them. If restore fails before virtio_device_ready(), reuse the remove path to stop the device. Once the device is ready, return errors directly instead of deleting the virtqueues again.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 6.18.40; 6.16; 0623c759276885c3ae88197ba6fb5c9c6ba8612f <79366023aa891ca31376021a7bccff6384ca1ff1; patch: 7.2; 0623c759276885c3ae88197ba6fb5c9c6ba8612f <548d2208455f14e6121404c6e30e997bfe0cd264; patch: 0; 0623c759276885c3ae88197ba6fb5c9c6ba8612f <aebebd1e9d70b650fc9e877082e0134edcf511da; patch: 7.1.5

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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