FKIE_CVE-2022-49932
Vulnerability from fkie_nvd - Published: 2025-05-02 16:15 - Updated: 2026-06-17 05:19
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved:
KVM: VMX: Do _all_ initialization before exposing /dev/kvm to userspace
Call kvm_init() only after _all_ setup is complete, as kvm_init() exposes
/dev/kvm to userspace and thus allows userspace to create VMs (and call
other ioctls). E.g. KVM will encounter a NULL pointer when attempting to
add a vCPU to the per-CPU loaded_vmcss_on_cpu list if userspace is able to
create a VM before vmx_init() configures said list.
BUG: kernel NULL pointer dereference, address: 0000000000000008
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 0 P4D 0
Oops: 0002 [#1] SMP
CPU: 6 PID: 1143 Comm: stable Not tainted 6.0.0-rc7+ #988
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015
RIP: 0010:vmx_vcpu_load_vmcs+0x68/0x230 [kvm_intel]
<TASK>
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
</TASK>
Modules linked in: vhost_net vhost vhost_iotlb tap kvm_intel(+) kvm irqbypass
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| linux | linux_kernel | * | |
| linux | linux_kernel | * |
{
"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 \u003cTASK\u003e\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 \u003c/TASK\u003e\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": "2026-06-17T05:19:34.057",
"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"
}
]
},
"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"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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