Answer in brief
CVE-2026-74312 records a High severity (CVSS 7.8) vulnerability in vhost/vdpa: validate virtqueue index in mmap and fault paths. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9 <0f310bac6db9bd3bb1655707d692d9d2a86eeb17 || >=ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9 <4bf5a51963ff816f7443702dc536b9327cf5e550 || >=ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9 <55a644031e610ea93fbde2702c7b8f267476552f || >=ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9 <2b3f79b90b231a682315fe2191bb71925650e183 || >=ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9 <bbba4f92515238d76018e9b75e41b16d83df52c8 || >=ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9 <1f5f94c6c6b2e4eaa5b45815509e21d0c6cfa81e || >=ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9 <32ac9097aa2463fcfc12f61cc4a9ebc3579cba7d || >=ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9 <929e4f044621c8cc30b612fb74e1410bef09e41b | 0f310bac6db9bd3bb1655707d692d9d2a86eeb17, 4bf5a51963ff816f7443702dc536b9327cf5e550, 55a644031e610ea93fbde2702c7b8f267476552f, 2b3f79b90b231a682315fe2191bb71925650e183, bbba4f92515238d76018e9b75e41b16d83df52c8, 1f5f94c6c6b2e4eaa5b45815509e21d0c6cfa81e, 32ac9097aa2463fcfc12f61cc4a9ebc3579cba7d, 929e4f044621c8cc30b612fb74e1410bef09e41b |
| Linux/Linuxgeneric | 5.8 | Not reported |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
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.
Quoted source text, attributed separately from HOL analysis.