{"apiVersion":"1.0","identifier":"CVE-2026-74312","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.","publishedAt":"2026-08-15T06:22:31","lastModifiedAt":"2026-08-17T06:19:25","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74312","cvssScore":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","epssProbability":0.00129,"riskScore":0.79,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-74312","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-74312","en":"https://www.redsauce.net/en/cves/CVE-2026-74312","fr":"https://www.redsauce.net/fr/cves/CVE-2026-74312","pt":"https://www.redsauce.net/pt/cves/CVE-2026-74312","de":"https://www.redsauce.net/de/cves/CVE-2026-74312","sk":"https://www.redsauce.net/sk/cves/CVE-2026-74312","el":"https://www.redsauce.net/el/cves/CVE-2026-74312"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-74312"}}