{"id":"CVE-2026-74312","revision":"75a83f3623874596bef4ad0f183303a8","records":[{"revision":"75a83f3623874596bef4ad0f183303a8","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-74312","aliases":[],"title":"vhost/vdpa: validate virtqueue index in mmap and fault paths","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvhost/vdpa: validate virtqueue index in mmap and fault paths\n\nvhost_vdpa_mmap() and vhost_vdpa_fault() use vma->vm_pgoff as a\nvirtqueue index for get_vq_notification(), but they do not validate\nthat the index is smaller than v->nvqs.\n\nThe ioctl path already performs both a bounds check and\narray_index_nospec(), but the mmap/fault path only checks that the\nindex fits in u16. This allows an out-of-range queue index to reach\ndriver-specific get_vq_notification() callbacks.\n\nFix this by extracting a unified vhost_vdpa_get_vq_notification()\nhelper that validates the queue index against v->nvqs and applies\narray_index_nospec() before calling the driver callback. Both the\nmmap and fault paths use this helper, and the bounds checking is\nconsolidated into a single location.\n\nFrom source inspection, the most defensible impact is out-of-bounds\naccess in the callback path, potentially leading to invalid PFN\nremaps and crash/DoS.","state":0,"publishedAt":"2026-08-15T05:58:11.395+00:00","modifiedAt":"2026-10-16T18:55:32.188+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/vhost/vdpa.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9\",\n                            \"lessThan\": \"0f310bac6db9bd3bb1655707d692d9d2a86eeb17\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9\",\n                            \"lessThan\": \"4bf5a51963ff816f7443702dc536b9327cf5e550\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9\",\n                            \"lessThan\": \"55a644031e610ea93fbde2702c7b8f267476552f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9\",\n                            \"lessThan\": \"2b3f79b90b231a682315fe2191bb71925650e183\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9\",\n                            \"lessThan\": \"bbba4f92515238d76018e9b75e41b16d83df52c8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9\",\n                            \"lessThan\": \"1f5f94c6c6b2e4eaa5b45815509e21d0c6cfa81e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9\",\n                            \"lessThan\": \"32ac9097aa2463fcfc12f61cc4a9ebc3579cba7d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9\",\n                            \"lessThan\": \"929e4f044621c8cc30b612fb74e1410bef09e41b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/vhost/vdpa.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.8\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.8\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.261\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.212\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.178\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.145\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.97\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.40\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.5\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/0f310bac6db9bd3bb1655707d692d9d2a86eeb17","https://git.kernel.org/stable/c/4bf5a51963ff816f7443702dc536b9327cf5e550","https://git.kernel.org/stable/c/55a644031e610ea93fbde2702c7b8f267476552f","https://git.kernel.org/stable/c/2b3f79b90b231a682315fe2191bb71925650e183","https://git.kernel.org/stable/c/bbba4f92515238d76018e9b75e41b16d83df52c8","https://git.kernel.org/stable/c/1f5f94c6c6b2e4eaa5b45815509e21d0c6cfa81e","https://git.kernel.org/stable/c/32ac9097aa2463fcfc12f61cc4a9ebc3579cba7d","https://git.kernel.org/stable/c/929e4f044621c8cc30b612fb74e1410bef09e41b"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74312","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-74312","identifiers":["CVE-2026-74312"]},"retained":false,"historicalAffected":[]}],"coverage":[]}