CVE-2026-74312— vhost/vdpa: validate virtqueue index in mmap and fault paths
Possible ATT&CK Techniques 1AI
T1203 · Exploitation for Client ExecutionGet alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-74312
Vulnerability Information
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Vulnerability Title
vhost/vdpa: validate virtqueue index in mmap and fault paths
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: vhost/vdpa: validate virtqueue index in mmap and fault paths vhost_vdpa_mmap() and vhost_vdpa_fault() use vma->vm_pgoff as a virtqueue index for get_vq_notification(), but they do not validate that the index is smaller than v->nvqs. The ioctl path already performs both a bounds check and array_index_nospec(), but the mmap/fault path only checks that the index fits in u16. This allows an out-of-range queue index to reach driver-specific get_vq_notification() callbacks. Fix this by extracting a unified vhost_vdpa_get_vq_notification() helper that validates the queue index against v->nvqs and applies array_index_nospec() before calling the driver callback. Both the mmap and fault paths use this helper, and the bounds checking is consolidated into a single location. From source inspection, the most defensible impact is out-of-bounds access in the callback path, potentially leading to invalid PFN remaps and crash/DoS.
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-2026-74312
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Patches & Fixes for CVE-2026-74312 (8)
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
V. Comments for CVE-2026-74312
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