CVE-2026-74312

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74312", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.883Z", "datePublished": "2026-08-15T05:58:11.395Z", "dateUpdated": "2026-10-16T18:55:32.188Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:45:44.929Z"}, "descriptions": [{"lang": "en", "value": "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."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The flaw is reached only via local mmap()/page-fault handling on /dev/vhost-vdpa-N (vma->vm_pgoff selects the virtqueue); there is no network, adjacent-radio, or physical-device path to this code.\nAC:L - Once the device node is open, the attacker fully controls vm_pgoff and can pick any index up to 65535; no race, rare config, or victim-dependent timing is required to hit the out-of-range callback.\nPR:L - vhost_vdpa_open()/mmap() perform no capable() checks; in typical cloud/hypervisor deployments the vhost-vdpa char device is held by an unprivileged VMM/QEMU account (or a compromised QEMU), not init-namespace root.\nUI:N - Exploitation requires only the attacker's own open/mmap of the vhost-vdpa device with a crafted pgoff; no separate victim mount, click, or administrative action is needed.\nS:U - Impact stays within the host kernel security domain reached through the vhost-vdpa interface; it is not a guest-to-host VM escape or IOMMU-boundary bypass by itself.\nC:H - An out-of-range index drives driver get_vq_notification() callbacks (e.g. vp_vdpa/ifcvf/pds/octeon) to read past vring metadata; the returned notify.addr is then used by vmf_insert_pfn(), enabling arbitrary physical-page mapping and kernel memory disclosure.\nI:H - The mmap mapping is write-only doorbell access; remapping an attacker-chosen physical page via the corrupted notify.addr grants a write primitive to arbitrary physical memory and device MMIO, supporting control-flow or privilege manipulation.\nA:H - Invalid or attacker-influenced PFN insertion during fault handling can BUG/oops the kernel immediately; even without full exploitation, the out-of-bounds callback access provides a reliable host crash/DoS vector."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/vhost/vdpa.c"], "versions": [{"version": "ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9", "lessThan": "0f310bac6db9bd3bb1655707d692d9d2a86eeb17", "status": "affected", "versionType": "git"}, {"version": "ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9", "lessThan": "4bf5a51963ff816f7443702dc536b9327cf5e550", "status": "affected", "versionType": "git"}, {"version": "ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9", "lessThan": "55a644031e610ea93fbde2702c7b8f267476552f", "status": "affected", "versionType": "git"}, {"version": "ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9", "lessThan": "2b3f79b90b231a682315fe2191bb71925650e183", "status": "affected", "versionType": "git"}, {"version": "ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9", "lessThan": "bbba4f92515238d76018e9b75e41b16d83df52c8", "status": "affected", "versionType": "git"}, {"version": "ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9", "lessThan": "1f5f94c6c6b2e4eaa5b45815509e21d0c6cfa81e", "status": "affected", "versionType": "git"}, {"version": "ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9", "lessThan": "32ac9097aa2463fcfc12f61cc4a9ebc3579cba7d", "status": "affected", "versionType": "git"}, {"version": "ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9", "lessThan": "929e4f044621c8cc30b612fb74e1410bef09e41b", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/vhost/vdpa.c"], "versions": [{"version": "5.8", "status": "affected"}, {"version": "0", "lessThan": "5.8", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": 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"7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/0f310bac6db9bd3bb1655707d692d9d2a86eeb17"}, {"url": "https://git.kernel.org/stable/c/4bf5a51963ff816f7443702dc536b9327cf5e550"}, {"url": "https://git.kernel.org/stable/c/55a644031e610ea93fbde2702c7b8f267476552f"}, {"url": "https://git.kernel.org/stable/c/2b3f79b90b231a682315fe2191bb71925650e183"}, {"url": "https://git.kernel.org/stable/c/bbba4f92515238d76018e9b75e41b16d83df52c8"}, {"url": "https://git.kernel.org/stable/c/1f5f94c6c6b2e4eaa5b45815509e21d0c6cfa81e"}, {"url": "https://git.kernel.org/stable/c/32ac9097aa2463fcfc12f61cc4a9ebc3579cba7d"}, {"url": "https://git.kernel.org/stable/c/929e4f044621c8cc30b612fb74e1410bef09e41b"}], "title": "vhost/vdpa: validate virtqueue index in mmap and fault paths", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-74312", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T18:53:00.610908Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T18:55:32.188Z"}}]}}

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no race, rare config, or victim-dependent timing is required to hit the out-of-range callback.\nPR:L - vhost_vdpa_open()/mmap() perform no capable() checks; in typical cloud/hypervisor deployments the vhost-vdpa char device is held by an unprivileged VMM/QEMU account (or a compromised QEMU), not init-namespace root.\nUI:N - Exploitation requires only the attacker's own open/mmap of the vhost-vdpa device with a crafted pgoff; no separate victim mount, click, or administrative action is needed.\nS:U - Impact stays within the host kernel security domain reached through the vhost-vdpa interface; it is not a guest-to-host VM escape or IOMMU-boundary bypass by itself.\nC:H - An out-of-range index drives driver get_vq_notification() callbacks (e.g. vp_vdpa/ifcvf/pds/octeon) to read past vring metadata; the returned notify.addr is then used by vmf_insert_pfn(), enabling arbitrary physical-page mapping and kernel memory disclosure.\nI:H - The mmap mapping is write-only doorbell access; remapping an attacker-chosen physical page via the corrupted notify.addr grants a write primitive to arbitrary physical memory and device MMIO, supporting control-flow or privilege manipulation.\nA:H - Invalid or attacker-influenced PFN insertion during fault handling can BUG/oops the kernel immediately; even without full exploitation, the out-of-bounds callback access provides a reliable host crash/DoS vector."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9", "lessThan": "0f310bac6db9bd3bb1655707d692d9d2a86eeb17", "versionType": "git"}, {"status": "affected", "version": "ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9", "lessThan": "4bf5a51963ff816f7443702dc536b9327cf5e550", "versionType": "git"}, {"status": "affected", "version": "ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9", "lessThan": "55a644031e610ea93fbde2702c7b8f267476552f", "versionType": "git"}, {"status": "affected", "version": "ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9", "lessThan": "2b3f79b90b231a682315fe2191bb71925650e183", "versionType": "git"}, {"status": "affected", "version": "ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9", "lessThan": "bbba4f92515238d76018e9b75e41b16d83df52c8", "versionType": "git"}, {"status": "affected", "version": "ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9", "lessThan": "1f5f94c6c6b2e4eaa5b45815509e21d0c6cfa81e", "versionType": "git"}, {"status": "affected", "version": "ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9", "lessThan": "32ac9097aa2463fcfc12f61cc4a9ebc3579cba7d", "versionType": "git"}, {"status": "affected", "version": "ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9", "lessThan": "929e4f044621c8cc30b612fb74e1410bef09e41b", "versionType": "git"}], "programFiles": ["drivers/vhost/vdpa.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.8"}, {"status": "unaffected", "version": "0", "lessThan": "5.8", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.261", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.212", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.178", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.145", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.97", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.40", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.5", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/vhost/vdpa.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/0f310bac6db9bd3bb1655707d692d9d2a86eeb17"}, {"url": "https://git.kernel.org/stable/c/4bf5a51963ff816f7443702dc536b9327cf5e550"}, {"url": "https://git.kernel.org/stable/c/55a644031e610ea93fbde2702c7b8f267476552f"}, {"url": "https://git.kernel.org/stable/c/2b3f79b90b231a682315fe2191bb71925650e183"}, {"url": "https://git.kernel.org/stable/c/bbba4f92515238d76018e9b75e41b16d83df52c8"}, {"url": "https://git.kernel.org/stable/c/1f5f94c6c6b2e4eaa5b45815509e21d0c6cfa81e"}, {"url": "https://git.kernel.org/stable/c/32ac9097aa2463fcfc12f61cc4a9ebc3579cba7d"}, {"url": "https://git.kernel.org/stable/c/929e4f044621c8cc30b612fb74e1410bef09e41b"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "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."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.261", "versionStartIncluding": "5.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.212", "versionStartIncluding": "5.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.178", "versionStartIncluding": "5.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.145", "versionStartIncluding": "5.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.97", "versionStartIncluding": "5.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.40", "versionStartIncluding": "5.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.5", "versionStartIncluding": "5.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "5.8"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:45:44.929Z"}}}, "cveMetadata": {"cveId": "CVE-2026-74312", "state": "PUBLISHED", "dateUpdated": "2026-10-16T18:55:32.188Z", "dateReserved": "2026-08-15T05:44:03.883Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-08-15T05:58:11.395Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/vhost/vdpa.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "0f310bac6db9bd3bb1655707d692d9d2a86eeb17", "status": "affected", "version": "ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9", "versionType": "git"}, {"lessThan": "4bf5a51963ff816f7443702dc536b9327cf5e550", "status": "affected", "version": "ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9", "versionType": "git"}, {"lessThan": "55a644031e610ea93fbde2702c7b8f267476552f", "status": "affected", "version": "ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9", "versionType": "git"}, {"lessThan": "2b3f79b90b231a682315fe2191bb71925650e183", "status": "affected", "version": "ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9", "versionType": "git"}, {"lessThan": "bbba4f92515238d76018e9b75e41b16d83df52c8", "status": "affected", "version": "ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9", "versionType": "git"}, {"lessThan": "1f5f94c6c6b2e4eaa5b45815509e21d0c6cfa81e", "status": "affected", "version": "ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9", "versionType": "git"}, {"lessThan": "32ac9097aa2463fcfc12f61cc4a9ebc3579cba7d", "status": "affected", "version": "ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9", "versionType": "git"}, {"lessThan": "929e4f044621c8cc30b612fb74e1410bef09e41b", "status": "affected", "version": "ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/vhost/vdpa.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.8"}, {"lessThan": "5.8", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.261", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.212", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.178", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.145", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.97", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-74312", "lastModified": "2026-10-16T19:17:38.517", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-74312", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T18:53:00.610908Z", "version": "2.0.3"}}]}, "published": "2026-08-15T06:22:31.310", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0f310bac6db9bd3bb1655707d692d9d2a86eeb17"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1f5f94c6c6b2e4eaa5b45815509e21d0c6cfa81e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2b3f79b90b231a682315fe2191bb71925650e183"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/32ac9097aa2463fcfc12f61cc4a9ebc3579cba7d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4bf5a51963ff816f7443702dc536b9327cf5e550"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/55a644031e610ea93fbde2702c7b8f267476552f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/929e4f044621c8cc30b612fb74e1410bef09e41b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bbba4f92515238d76018e9b75e41b16d83df52c8"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: vhost/vdpa: validate virtqueue index in mmap and fault paths", "id": "2516835", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516835"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nvhost/vdpa: validate virtqueue index in mmap and fault paths\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.\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.\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.\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.", "A flaw was found in the Linux kernel's vhost/vdpa subsystem. Improper validation of the virtqueue index in the `vhost_vdpa_mmap()` and `vhost_vdpa_fault()` functions allows an out-of-range index to be used. This can lead to an out-of-bounds memory access in driver-specific callbacks, potentially causing invalid Page Frame Number (PFN) remaps, system crashes, or a Denial of Service (DoS)."], "name": "CVE-2026-74312", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74312\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74312\nhttps://lore.kernel.org/linux-cve-announce/2026081552-CVE-2026-74312-a131@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9,0f310bac6db9bd3bb1655707d692d9d2a86eeb17)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9,4bf5a51963ff816f7443702dc536b9327cf5e550)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9,55a644031e610ea93fbde2702c7b8f267476552f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9,2b3f79b90b231a682315fe2191bb71925650e183)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9,bbba4f92515238d76018e9b75e41b16d83df52c8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9,1f5f94c6c6b2e4eaa5b45815509e21d0c6cfa81e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9,32ac9097aa2463fcfc12f61cc4a9ebc3579cba7d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9,929e4f044621c8cc30b612fb74e1410bef09e41b)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.8"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.8)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.261,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.212,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.178,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.97,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-15T12:30:07.841685+00:00", "updated": "2026-08-22T02:45:03.716027+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}