CVE-2026-74311— virtio: rtc: tear down old virtqueues before restore
Possible ATT&CK Techniques 2AI
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I. Basic Information for CVE-2026-74311
Vulnerability Information
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Vulnerability Title
virtio: rtc: tear down old virtqueues before restore
Source: CVE Program / CVE List V5
Vulnerability Description
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: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-74311
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Patches & Fixes for CVE-2026-74311 (3)
Same Patch Batch · Linux · 2026-08-15 · 848 CVEs total
| CVE-2026-72255 | netfilter: nf_queue: pin bridge device while NFQUEUE holds fake dst | |
| CVE-2026-72268 | fbdev: tdfxfb: fix potential memory leak in tdfxfb_probe() | |
| CVE-2026-72267 | fbdev: carminefb: fix potential memory leak in alloc_carmine_fb() | |
| CVE-2026-72266 | fbdev: vesafb: fix memory leak in vesafb_probe() | |
| CVE-2026-72265 | fbdev: nvidia: fix potential memory leak in nvidiafb_probe() | |
| CVE-2026-72264 | fbdev: tridentfb: fix potential memory leak in trident_pci_probe() | |
| CVE-2026-72262 | ASoC: SOF: ipc3-control: Fix heap overflow in bytes_ext put/get | |
| CVE-2026-72263 | ASoC: SOF: topology: fix memory leak in snd_sof_load_topology | |
| CVE-2026-72261 | ASoC: SOF: ipc3-control: Validate size in snd_sof_update_control | |
| CVE-2026-72260 | ASoC: mediatek: mt8192: Check runtime resume during probe | |
| CVE-2026-72259 | ASoC: mediatek: mt8192: Release reserved memory on cleanup | |
| CVE-2026-72258 | ASoC: mediatek: mt8183: Release reserved memory on cleanup | |
| CVE-2026-72256 | netfilter: xt_cluster: reject template conntracks in hash match | |
| CVE-2026-72257 | ASoC: qcom: q6apm: fix NULL pointer dereference in graph_callback | |
| CVE-2026-72245 | gpu: host1x: Fix device reference leak in host1x_device_parse_dt() error path | |
| CVE-2026-72248 | netfilter: flowtable: support IPIP tunnel with direct xmit | |
| CVE-2026-72247 | netfilter: nf_conncount: fix zone comparison in tuple dedup | |
| CVE-2026-72246 | netfilter: flowtable: use correct direction to set up tunnel route | |
| CVE-2026-72249 | netfilter: flowtable: use dst in this direction when pushing IPIP header | |
| CVE-2026-72244 | gpu/buddy: bail out of try_harder when alignment cannot be honoured |
Showing top 20 of 848 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-74577
net: mpls: initialize rtm_tos in mpls_getroute() - CVE-2026-74576
mm/slab: prevent unbounded recursion in free path with new k - CVE-2026-74574
dmaengine: idxd: fix fdev setup failure cleanup in idxd_cdev - CVE-2026-74575
thunderbolt: Prevent XDomain delayed work use-after-free on - CVE-2026-74573
iommu/arm-smmu-v3-iommufd: Require exactly one Stream ID for
Same vendor: Linux
- CVE-2026-74577
net: mpls: initialize rtm_tos in mpls_getroute() - CVE-2026-74576
mm/slab: prevent unbounded recursion in free path with new k - CVE-2026-74574
dmaengine: idxd: fix fdev setup failure cleanup in idxd_cdev - CVE-2026-74575
thunderbolt: Prevent XDomain delayed work use-after-free on - CVE-2026-74573
iommu/arm-smmu-v3-iommufd: Require exactly one Stream ID for
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