CVE-2024-47748

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And such registering\nand unregistering will only be done if DRIVER_OK is set."}], "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 vulnerability is reached exclusively through `ioctl()` calls (`VHOST_SET_VRING_CALL`, `VHOST_VDPA_SET_STATUS`) on the `/dev/vhost-vdpa-N` character device. This requires local access to the host; no network or adjacent-network path exists.\nAC:L - The attacker deterministically drives the entire sequence with ordinary ioctls \u2014 set a call fd, set DRIVER_OK, reset to invalidate the MSI vector, then rebind a new call fd \u2014 and controls both the eventfd allocation and the eventfd free, so the slab reuse that makes the stale token collide is attacker-driven grooming rather than an uncontrolled condition. No race with an independent party is involved.\nPR:L - No capability check exists anywhere on the path; the sole gate is DAC on the vhost-vdpa device node, which in the standard libvirt/QEMU hypervisor deployment is held by an unprivileged VMM account. An attacker with that account \u2014 or one who has compromised the QEMU process from a guest \u2014 reaches the bug without root.\nUI:N - The attacker performs the complete ioctl sequence and eventfd grooming from their own process. No action by any other user or administrator is needed.\nS:U - The vulnerable component and the primary impacted component are both the host kernel, so the memory corruption stays within a single security authority. The knock-on effect on other guests' interrupt-remapping entries is a consequence of host-kernel compromise rather than an exploit that crosses the boundary as its defining characteristic.\nC:H - The freed eventfd_ctx pointer is retained as an identity key in a global registry shared with KVM, and the resulting mismatched connect/disconnect plus irqbypass module refcount underflow give the attacker use-after-free access to kernel objects and module memory. Per standard kernel scoring, a use-after-free grants control over freed-object contents and is treated as enabling arbitrary kernel memory disclosure.\nI:H - The stale token causes `__disconnect()`/`__connect()` against the wrong consumer, reprogramming IOMMU interrupt-remapping entries for an unrelated VM with a foreign device IRQ, while the double `list_del()` on an already-unlinked node provides a linked-list unlink write primitive and the module refcount underflow enables a UAF on module text. These are exploitable for kernel memory corruption and control-flow hijacking.\nA:H - Executing `list_del()` on a node bearing `LIST_POISON1/LIST_POISON2` faults immediately with a general protection fault, and the mismatched KVM producer teardown trips `WARN_ON` and corrupts posted-interrupt state. This is a reliable kernel oops/panic that also disrupts unrelated guests on the host."}]}], "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": "2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60", "lessThan": "0c170b1e918b9afac25e2bbd01eaa2bfc0ece8c0", "status": "affected", "versionType": "git"}, {"version": "2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60", "lessThan": "927a2580208e0f9b0b47b08f1c802b7233a7ba3c", "status": "affected", "versionType": "git"}, {"version": "2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60", "lessThan": "ec5f1b54ceb23475049ada6e7a43452cf4df88d1", "status": "affected", "versionType": "git"}, {"version": "2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60", "lessThan": "ca64edd7ae93402af2596a952e0d94d545e2b9c0", "status": "affected", "versionType": "git"}, {"version": "2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60", 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And such registering\nand unregistering will only be done if DRIVER_OK is set."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.227", "versionStartIncluding": "5.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.168", "versionStartIncluding": "5.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.113", "versionStartIncluding": "5.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.54", "versionStartIncluding": "5.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.10.13", "versionStartIncluding": "5.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.11.2", "versionStartIncluding": "5.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12", "versionStartIncluding": "5.9"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-05-04T09:39:01.429Z"}}}, "cveMetadata": {"cveId": "CVE-2024-47748", "state": "PUBLISHED", "dateUpdated": "2025-11-03T22:21:42.762Z", "dateReserved": "2024-09-30T16:00:12.960Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-10-21T12:14:14.448Z", "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": "0c170b1e918b9afac25e2bbd01eaa2bfc0ece8c0", "status": "affected", "version": "2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60", "versionType": "git"}, {"lessThan": "927a2580208e0f9b0b47b08f1c802b7233a7ba3c", "status": "affected", "version": "2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60", "versionType": "git"}, {"lessThan": "ec5f1b54ceb23475049ada6e7a43452cf4df88d1", "status": "affected", "version": "2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60", "versionType": "git"}, {"lessThan": "ca64edd7ae93402af2596a952e0d94d545e2b9c0", "status": "affected", "version": "2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60", "versionType": "git"}, {"lessThan": "fae9b1776f53aab93ab345bdbf653b991aed717d", "status": "affected", "version": "2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60", "versionType": "git"}, {"lessThan": "7cf2fb51175cafe01df8c43fa15a06194a59c6e2", "status": "affected", "version": "2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60", "versionType": "git"}, {"lessThan": "02e9e9366fefe461719da5d173385b6685f70319", "status": "affected", "version": "2cf1ba9a4d15cb78b96ea97f727b93382c3f9a60", "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": "5.9"}, {"lessThan": "5.9", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.227", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.168", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.113", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.54", "versionType": "semver"}, {"lessThanOrEqual": "6.10.*", "status": "unaffected", "version": "6.10.13", "versionType": "semver"}, {"lessThanOrEqual": "6.11.*", "status": "unaffected", "version": "6.11.2", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.12", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C44A23B8-33E9-4DB6-8E6F-AF0B4E5CD507", "versionEndExcluding": "5.10.227", "versionStartIncluding": "5.9", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "4D51C05D-455B-4D8D-89E7-A58E140B864C", "versionEndExcluding": "5.15.168", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "D01BD22E-ACD1-4618-9D01-6116570BE1EE", "versionEndExcluding": "6.1.113", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "D448821D-C085-4CAF-88FA-2DDE7BE21976", "versionEndExcluding": "6.6.54", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "CE94BB8D-B0AB-4563-9ED7-A12122B56EBE", "versionEndExcluding": "6.10.13", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "AB755D26-97F4-43B6-8604-CD076811E181", "versionEndExcluding": "6.11.2", "versionStartIncluding": "6.11", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvhost_vdpa: assign irq bypass producer token correctly\n\nWe used to call irq_bypass_unregister_producer() in\nvhost_vdpa_setup_vq_irq() which is problematic as we don't know if the\ntoken pointer is still valid or not.\n\nActually, we use the eventfd_ctx as the token so the life cycle of the\ntoken should be bound to the VHOST_SET_VRING_CALL instead of\nvhost_vdpa_setup_vq_irq() which could be called by set_status().\n\nFixing this by setting up irq bypass producer's token when handling\nVHOST_SET_VRING_CALL and un-registering the producer before calling\nvhost_vring_ioctl() to prevent a possible use after free as eventfd\ncould have been released in vhost_vring_ioctl(). And such registering\nand unregistering will only be done if DRIVER_OK is set."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: vhost_vdpa: asignar correctamente el token del productor de omisi\u00f3n de irq Sol\u00edamos llamar a irq_bypass_unregister_producer() en vhost_vdpa_setup_vq_irq(), lo cual es problem\u00e1tico ya que no sabemos si el puntero del token sigue siendo v\u00e1lido o no. En realidad, usamos eventfd_ctx como token, por lo que el ciclo de vida del token deber\u00eda estar vinculado a VHOST_SET_VRING_CALL en lugar de a vhost_vdpa_setup_vq_irq(), que podr\u00eda llamarse mediante set_status(). Para solucionar esto, configuramos el token del productor de omisi\u00f3n de irq al manejar VHOST_SET_VRING_CALL y anulamos el registro del productor antes de llamar a vhost_vring_ioctl() para evitar un posible use after free, ya que eventfd podr\u00eda haberse liberado en vhost_vring_ioctl(). Y dicho registro y anulaci\u00f3n de registro solo se realizar\u00e1 si DRIVER_OK est\u00e1 configurado."}], "id": "CVE-2024-47748", "lastModified": "2026-08-04T11:20:48.207", "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"}, {"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": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-47748", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-10-21T12:58:17.248658Z", "version": "2.0.3"}}]}, "published": "2024-10-21T13:15:04.857", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/02e9e9366fefe461719da5d173385b6685f70319"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0c170b1e918b9afac25e2bbd01eaa2bfc0ece8c0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7cf2fb51175cafe01df8c43fa15a06194a59c6e2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/927a2580208e0f9b0b47b08f1c802b7233a7ba3c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ca64edd7ae93402af2596a952e0d94d545e2b9c0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ec5f1b54ceb23475049ada6e7a43452cf4df88d1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fae9b1776f53aab93ab345bdbf653b991aed717d"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2025:6966", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-570.12.1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-05-13T00:00:00Z"}, {"advisory": "RHSA-2025:6966", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-570.12.1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-05-13T00:00:00Z"}], "bugzilla": {"description": "kernel: vhost_vdpa: assign irq bypass producer token correctly", "id": "2320245", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2320245"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-416", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nvhost_vdpa: assign irq bypass producer token correctly\nWe used to call irq_bypass_unregister_producer() in\nvhost_vdpa_setup_vq_irq() which is problematic as we don't know if the\ntoken pointer is still valid or not.\nActually, we use the eventfd_ctx as the token so the life cycle of the\ntoken should be bound to the VHOST_SET_VRING_CALL instead of\nvhost_vdpa_setup_vq_irq() which could be called by set_status().\nFixing this by setting up irq bypass producer's token when handling\nVHOST_SET_VRING_CALL and un-registering the producer before calling\nvhost_vring_ioctl() to prevent a possible use after free as eventfd\ncould have been released in vhost_vring_ioctl(). And such registering\nand unregistering will only be done if DRIVER_OK is set.", "A use-after-free flaw was found in drivers/vhost/vdpa.c in the Linux kernel."], "name": "CVE-2024-47748", "package_state": [{"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": "Will not fix", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-10-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-47748\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-47748\nhttps://lore.kernel.org/linux-cve-announce/2024102112-CVE-2024-47748-a134@gregkh/T"], "threat_severity": "Moderate"}

{}