CVE-2022-49932

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KVM will encounter a NULL pointer when attempting to\nadd a vCPU to the per-CPU loaded_vmcss_on_cpu list if userspace is able to\ncreate a VM before vmx_init() configures said list.\n\n BUG: kernel NULL pointer dereference, address: 0000000000000008\n #PF: supervisor write access in kernel mode\n #PF: error_code(0x0002) - not-present page\n PGD 0 P4D 0\n Oops: 0002 [#1] SMP\n CPU: 6 PID: 1143 Comm: stable Not tainted 6.0.0-rc7+ #988\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015\n RIP: 0010:vmx_vcpu_load_vmcs+0x68/0x230 [kvm_intel]\n <TASK>\n vmx_vcpu_load+0x16/0x60 [kvm_intel]\n kvm_arch_vcpu_load+0x32/0x1f0 [kvm]\n vcpu_load+0x2f/0x40 [kvm]\n kvm_arch_vcpu_create+0x231/0x310 [kvm]\n kvm_vm_ioctl+0x79f/0xe10 [kvm]\n ? handle_mm_fault+0xb1/0x220\n __x64_sys_ioctl+0x80/0xb0\n do_syscall_64+0x2b/0x50\n entry_SYSCALL_64_after_hwframe+0x46/0xb0\n RIP: 0033:0x7f5a6b05743b\n </TASK>\n Modules linked in: vhost_net vhost vhost_iotlb tap kvm_intel(+) kvm irqbypass"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/x86/kvm/vmx/vmx.c"], "versions": [{"version": "dbef2808af6c594922fe32833b30f55f35e9da6d", "lessThan": "e136e969d268b9b89329c816c002e53f60e82985", "status": "affected", "versionType": "git"}, {"version": "dbef2808af6c594922fe32833b30f55f35e9da6d", "lessThan": "e28533c08023c4b319b7f2cd77f3f7c9204eb517", "status": "affected", "versionType": "git"}, {"version": "dbef2808af6c594922fe32833b30f55f35e9da6d", "lessThan": "e32b120071ea114efc0b4ddd439547750b85f618", "status": "affected", "versionType": "git"}, {"version": "b2f7d0adc1260fa33ff3e992d18ff15873e68a67", "status": "affected", "versionType": "git"}, {"version": "2c0bf2560ca18abe1451db23b8ef8700c67cc44f", "status": "affected", "versionType": "git"}, {"version": "f9971a898a815c2a6cce2932e91a576b28ed4cce", "status": "affected", "versionType": "git"}, {"version": "40888c31aca3a46f266f1f121679f8e1982df085", "status": "affected", "versionType": "git"}, {"version": "cd3f438fbb9cb60da32dd2b665f7dc9baba1c4ad", "status": "affected", "versionType": "git"}, {"version": "e35a2dc8c7f664ae8a9cc46d19985dc79bfc1083", "status": "affected", "versionType": "git"}, {"version": "4.9.220", "lessThan": "4.10", "status": "affected", "versionType": "semver"}, {"version": "4.14.177", "lessThan": "4.15", "status": "affected", "versionType": "semver"}, {"version": "4.19.116", "lessThan": "4.20", "status": "affected", "versionType": "semver"}, {"version": "5.4.33", "lessThan": "5.5", "status": "affected", "versionType": "semver"}, {"version": "5.5.18", "lessThan": "5.6", "status": "affected", "versionType": "semver"}, {"version": "5.6.5", "lessThan": "5.7", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", 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"https://git.kernel.org/stable/c/e32b120071ea114efc0b4ddd439547750b85f618"}], "title": "KVM: VMX: Do _all_ initialization before exposing /dev/kvm to userspace", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2022-49932", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-05T19:51:38.282450Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-05T20:00:11.780Z"}}]}}

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E.g. KVM will encounter a NULL pointer when attempting to\nadd a vCPU to the per-CPU loaded_vmcss_on_cpu list if userspace is able to\ncreate a VM before vmx_init() configures said list.\n\n BUG: kernel NULL pointer dereference, address: 0000000000000008\n #PF: supervisor write access in kernel mode\n #PF: error_code(0x0002) - not-present page\n PGD 0 P4D 0\n Oops: 0002 [#1] SMP\n CPU: 6 PID: 1143 Comm: stable Not tainted 6.0.0-rc7+ #988\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015\n RIP: 0010:vmx_vcpu_load_vmcs+0x68/0x230 [kvm_intel]\n <TASK>\n vmx_vcpu_load+0x16/0x60 [kvm_intel]\n kvm_arch_vcpu_load+0x32/0x1f0 [kvm]\n vcpu_load+0x2f/0x40 [kvm]\n kvm_arch_vcpu_create+0x231/0x310 [kvm]\n kvm_vm_ioctl+0x79f/0xe10 [kvm]\n ? handle_mm_fault+0xb1/0x220\n __x64_sys_ioctl+0x80/0xb0\n do_syscall_64+0x2b/0x50\n entry_SYSCALL_64_after_hwframe+0x46/0xb0\n RIP: 0033:0x7f5a6b05743b\n </TASK>\n Modules linked in: vhost_net vhost vhost_iotlb tap kvm_intel(+) kvm irqbypass"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.20", "versionStartIncluding": "5.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.2.7", "versionStartIncluding": "5.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.3", "versionStartIncluding": "5.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "4.9.220"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "4.14.177"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "4.19.116"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.4.33"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.5.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.6.5"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-23T15:23:17.642Z"}}}, "cveMetadata": {"cveId": "CVE-2022-49932", "state": "PUBLISHED", "dateUpdated": "2026-11-05T20:00:11.780Z", "dateReserved": "2025-05-01T14:05:17.254Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-05-02T15:54:53.215Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["arch/x86/kvm/vmx/vmx.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "e136e969d268b9b89329c816c002e53f60e82985", "status": "affected", "version": "dbef2808af6c594922fe32833b30f55f35e9da6d", "versionType": "git"}, {"lessThan": "e28533c08023c4b319b7f2cd77f3f7c9204eb517", "status": "affected", "version": "dbef2808af6c594922fe32833b30f55f35e9da6d", "versionType": "git"}, {"lessThan": "e32b120071ea114efc0b4ddd439547750b85f618", "status": "affected", "version": "dbef2808af6c594922fe32833b30f55f35e9da6d", "versionType": "git"}, {"status": "affected", "version": "b2f7d0adc1260fa33ff3e992d18ff15873e68a67", "versionType": "git"}, {"status": "affected", "version": "2c0bf2560ca18abe1451db23b8ef8700c67cc44f", "versionType": "git"}, {"status": "affected", "version": "f9971a898a815c2a6cce2932e91a576b28ed4cce", "versionType": "git"}, {"status": "affected", "version": "40888c31aca3a46f266f1f121679f8e1982df085", "versionType": "git"}, {"status": "affected", "version": "cd3f438fbb9cb60da32dd2b665f7dc9baba1c4ad", "versionType": "git"}, {"status": "affected", "version": "e35a2dc8c7f664ae8a9cc46d19985dc79bfc1083", "versionType": "git"}, {"lessThan": "4.10", "status": "affected", "version": "4.9.220", "versionType": "semver"}, {"lessThan": "4.15", "status": "affected", "version": "4.14.177", "versionType": "semver"}, {"lessThan": "4.20", "status": "affected", "version": "4.19.116", "versionType": "semver"}, {"lessThan": "5.5", "status": "affected", "version": "5.4.33", "versionType": "semver"}, {"lessThan": "5.6", "status": "affected", "version": "5.5.18", "versionType": "semver"}, {"lessThan": "5.7", "status": "affected", "version": "5.6.5", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["arch/x86/kvm/vmx/vmx.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.7"}, {"lessThan": "5.7", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.20", "versionType": "semver"}, {"lessThanOrEqual": "6.2.*", "status": "unaffected", "version": "6.2.7", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "2B06CA9A-19CF-4C9A-AC5F-E30660581E22", "versionEndExcluding": "6.1.20", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "EFEDDF17-189C-4901-BD6B-41752E80AAA4", "versionEndExcluding": "6.2.7", "versionStartIncluding": "6.2", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: VMX: Do _all_ initialization before exposing /dev/kvm to userspace\n\nCall kvm_init() only after _all_ setup is complete, as kvm_init() exposes\n/dev/kvm to userspace and thus allows userspace to create VMs (and call\nother ioctls). E.g. KVM will encounter a NULL pointer when attempting to\nadd a vCPU to the per-CPU loaded_vmcss_on_cpu list if userspace is able to\ncreate a VM before vmx_init() configures said list.\n\n BUG: kernel NULL pointer dereference, address: 0000000000000008\n #PF: supervisor write access in kernel mode\n #PF: error_code(0x0002) - not-present page\n PGD 0 P4D 0\n Oops: 0002 [#1] SMP\n CPU: 6 PID: 1143 Comm: stable Not tainted 6.0.0-rc7+ #988\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015\n RIP: 0010:vmx_vcpu_load_vmcs+0x68/0x230 [kvm_intel]\n <TASK>\n vmx_vcpu_load+0x16/0x60 [kvm_intel]\n kvm_arch_vcpu_load+0x32/0x1f0 [kvm]\n vcpu_load+0x2f/0x40 [kvm]\n kvm_arch_vcpu_create+0x231/0x310 [kvm]\n kvm_vm_ioctl+0x79f/0xe10 [kvm]\n ? handle_mm_fault+0xb1/0x220\n __x64_sys_ioctl+0x80/0xb0\n do_syscall_64+0x2b/0x50\n entry_SYSCALL_64_after_hwframe+0x46/0xb0\n RIP: 0033:0x7f5a6b05743b\n </TASK>\n Modules linked in: vhost_net vhost vhost_iotlb tap kvm_intel(+) kvm irqbypass"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: KVM: VMX: Inicializa _toda_ la instancia antes de exponer /dev/kvm al espacio de usuario. Llama a kvm_init() solo despu\u00e9s de que se complete la configuraci\u00f3n _toda_, ya que kvm_init() expone /dev/kvm al espacio de usuario y, por lo tanto, permite que este cree m\u00e1quinas virtuales (y llame a otras ioctl). Por ejemplo, KVM encontrar\u00e1 un puntero nulo al intentar agregar una vCPU a la lista por CPU load_vmcss_on_cpu si el espacio de usuario puede crear una m\u00e1quina virtual antes de que vmx_init() configure dicha lista. ERROR: desreferencia de puntero NULL del kernel, direcci\u00f3n: 0000000000000008 #PF: acceso de escritura del supervisor en modo kernel #PF: error_code(0x0002) - p\u00e1gina no presente PGD 0 P4D 0 Oops: 0002 [#1] CPU SMP: 6 PID: 1143 Comm: estable No contaminado 6.0.0-rc7+ #988 Nombre del hardware: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 RIP: 0010:vmx_vcpu_load_vmcs+0x68/0x230 [kvm_intel] vmx_vcpu_load+0x16/0x60 [kvm_intel] kvm_arch_vcpu_load+0x32/0x1f0 [kvm] vcpu_load+0x2f/0x40 [kvm] kvm_arch_vcpu_create+0x231/0x310 [kvm] kvm_vm_ioctl+0x79f/0xe10 [kvm] ? handle_mm_fault+0xb1/0x220 __x64_sys_ioctl+0x80/0xb0 do_syscall_64+0x2b/0x50 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f5a6b05743b M\u00f3dulos vinculados en: vhost_net vhost vhost_iotlb tap kvm_intel(+) kvm irqbypass"}], "id": "CVE-2022-49932", "lastModified": "2026-11-05T20:17:18.230", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2022-49932", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-05T19:51:38.282450Z", "version": "2.0.3"}}]}, "published": "2025-05-02T16:15:22.070", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e136e969d268b9b89329c816c002e53f60e82985"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e28533c08023c4b319b7f2cd77f3f7c9204eb517"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e32b120071ea114efc0b4ddd439547750b85f618"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: KVM: VMX: Do _all_ initialization before exposing /dev/kvm to userspace", "id": "2363684", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2363684"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nKVM: VMX: Do _all_ initialization before exposing /dev/kvm to userspace\nCall kvm_init() only after _all_ setup is complete, as kvm_init() exposes\n/dev/kvm to userspace and thus allows userspace to create VMs (and call\nother ioctls). E.g. KVM will encounter a NULL pointer when attempting to\nadd a vCPU to the per-CPU loaded_vmcss_on_cpu list if userspace is able to\ncreate a VM before vmx_init() configures said list.\nBUG: kernel NULL pointer dereference, address: 0000000000000008\n#PF: supervisor write access in kernel mode\n#PF: error_code(0x0002) - not-present page\nPGD 0 P4D 0\nOops: 0002 [#1] SMP\nCPU: 6 PID: 1143 Comm: stable Not tainted 6.0.0-rc7+ #988\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015\nRIP: 0010:vmx_vcpu_load_vmcs+0x68/0x230 [kvm_intel]\n<TASK>\nvmx_vcpu_load+0x16/0x60 [kvm_intel]\nkvm_arch_vcpu_load+0x32/0x1f0 [kvm]\nvcpu_load+0x2f/0x40 [kvm]\nkvm_arch_vcpu_create+0x231/0x310 [kvm]\nkvm_vm_ioctl+0x79f/0xe10 [kvm]\n? handle_mm_fault+0xb1/0x220\n__x64_sys_ioctl+0x80/0xb0\ndo_syscall_64+0x2b/0x50\nentry_SYSCALL_64_after_hwframe+0x46/0xb0\nRIP: 0033:0x7f5a6b05743b\n</TASK>\nModules linked in: vhost_net vhost vhost_iotlb tap kvm_intel(+) kvm irqbypass"], "name": "CVE-2022-49932", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "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": "2025-05-02T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49932\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49932\nhttps://lore.kernel.org/linux-cve-announce/2025050257-CVE-2022-49932-17ac@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-06-24T09:44:14.080874+00:00", "updated": "2025-06-24T09:44:14.080917+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}