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cvelist/2024/40xxx/CVE-2024-40953.json
CVE Team 334aac34a4
"-Synchronized-Data."
2024-11-08 16:00:46 +00:00

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{
"data_version": "4.0",
"data_type": "CVE",
"data_format": "MITRE",
"CVE_data_meta": {
"ID": "CVE-2024-40953",
"ASSIGNER": "cve@kernel.org",
"STATE": "PUBLIC"
},
"description": {
"description_data": [
{
"lang": "eng",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: Fix a data race on last_boosted_vcpu in kvm_vcpu_on_spin()\n\nUse {READ,WRITE}_ONCE() to access kvm->last_boosted_vcpu to ensure the\nloads and stores are atomic. In the extremely unlikely scenario the\ncompiler tears the stores, it's theoretically possible for KVM to attempt\nto get a vCPU using an out-of-bounds index, e.g. if the write is split\ninto multiple 8-bit stores, and is paired with a 32-bit load on a VM with\n257 vCPUs:\n\n CPU0 CPU1\n last_boosted_vcpu = 0xff;\n\n (last_boosted_vcpu = 0x100)\n last_boosted_vcpu[15:8] = 0x01;\n i = (last_boosted_vcpu = 0x1ff)\n last_boosted_vcpu[7:0] = 0x00;\n\n vcpu = kvm->vcpu_array[0x1ff];\n\nAs detected by KCSAN:\n\n BUG: KCSAN: data-race in kvm_vcpu_on_spin [kvm] / kvm_vcpu_on_spin [kvm]\n\n write to 0xffffc90025a92344 of 4 bytes by task 4340 on cpu 16:\n kvm_vcpu_on_spin (arch/x86/kvm/../../../virt/kvm/kvm_main.c:4112) kvm\n handle_pause (arch/x86/kvm/vmx/vmx.c:5929) kvm_intel\n vmx_handle_exit (arch/x86/kvm/vmx/vmx.c:?\n\t\t arch/x86/kvm/vmx/vmx.c:6606) kvm_intel\n vcpu_run (arch/x86/kvm/x86.c:11107 arch/x86/kvm/x86.c:11211) kvm\n kvm_arch_vcpu_ioctl_run (arch/x86/kvm/x86.c:?) kvm\n kvm_vcpu_ioctl (arch/x86/kvm/../../../virt/kvm/kvm_main.c:?) kvm\n __se_sys_ioctl (fs/ioctl.c:52 fs/ioctl.c:904 fs/ioctl.c:890)\n __x64_sys_ioctl (fs/ioctl.c:890)\n x64_sys_call (arch/x86/entry/syscall_64.c:33)\n do_syscall_64 (arch/x86/entry/common.c:?)\n entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)\n\n read to 0xffffc90025a92344 of 4 bytes by task 4342 on cpu 4:\n kvm_vcpu_on_spin (arch/x86/kvm/../../../virt/kvm/kvm_main.c:4069) kvm\n handle_pause (arch/x86/kvm/vmx/vmx.c:5929) kvm_intel\n vmx_handle_exit (arch/x86/kvm/vmx/vmx.c:?\n\t\t\tarch/x86/kvm/vmx/vmx.c:6606) kvm_intel\n vcpu_run (arch/x86/kvm/x86.c:11107 arch/x86/kvm/x86.c:11211) kvm\n kvm_arch_vcpu_ioctl_run (arch/x86/kvm/x86.c:?) kvm\n kvm_vcpu_ioctl (arch/x86/kvm/../../../virt/kvm/kvm_main.c:?) kvm\n __se_sys_ioctl (fs/ioctl.c:52 fs/ioctl.c:904 fs/ioctl.c:890)\n __x64_sys_ioctl (fs/ioctl.c:890)\n x64_sys_call (arch/x86/entry/syscall_64.c:33)\n do_syscall_64 (arch/x86/entry/common.c:?)\n entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)\n\n value changed: 0x00000012 -> 0x00000000"
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "n/a"
}
]
}
]
},
"affects": {
"vendor": {
"vendor_data": [
{
"vendor_name": "Linux",
"product": {
"product_data": [
{
"product_name": "Linux",
"version": {
"version_data": [
{
"version_affected": "<",
"version_name": "217ece6129f2",
"version_value": "11a772d5376a"
},
{
"version_value": "not down converted",
"x_cve_json_5_version_data": {
"versions": [
{
"version": "2.6.39",
"status": "affected"
},
{
"version": "0",
"lessThan": "2.6.39",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "4.19.323",
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.4.285",
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.228",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.169",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.96",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.36",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.9.7",
"lessThanOrEqual": "6.9.*",
"status": "unaffected",
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},
{
"version": "6.10",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
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],
"defaultStatus": "affected"
}
}
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}
}
]
}
}
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}
},
"references": {
"reference_data": [
{
"url": "https://git.kernel.org/stable/c/11a772d5376aa6d3e2e69b5b5c585f79b60c0e17",
"refsource": "MISC",
"name": "https://git.kernel.org/stable/c/11a772d5376aa6d3e2e69b5b5c585f79b60c0e17"
},
{
"url": "https://git.kernel.org/stable/c/4c141136a28421b78f34969b25a4fa32e06e2180",
"refsource": "MISC",
"name": "https://git.kernel.org/stable/c/4c141136a28421b78f34969b25a4fa32e06e2180"
},
{
"url": "https://git.kernel.org/stable/c/71fbc3af3dacb26c3aa2f30bb3ab05c44d082c84",
"refsource": "MISC",
"name": "https://git.kernel.org/stable/c/71fbc3af3dacb26c3aa2f30bb3ab05c44d082c84"
},
{
"url": "https://git.kernel.org/stable/c/82bd728a06e55f5b5f93d10ce67f4fe7e689853a",
"refsource": "MISC",
"name": "https://git.kernel.org/stable/c/82bd728a06e55f5b5f93d10ce67f4fe7e689853a"
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{
"url": "https://git.kernel.org/stable/c/92c77807d938145c7c3350c944ef9f39d7f6017c",
"refsource": "MISC",
"name": "https://git.kernel.org/stable/c/92c77807d938145c7c3350c944ef9f39d7f6017c"
},
{
"url": "https://git.kernel.org/stable/c/a937ef951bba72f48d2402451419d725d70dba20",
"refsource": "MISC",
"name": "https://git.kernel.org/stable/c/a937ef951bba72f48d2402451419d725d70dba20"
},
{
"url": "https://git.kernel.org/stable/c/95c8dd79f3a14df96b3820b35b8399bd91b2be60",
"refsource": "MISC",
"name": "https://git.kernel.org/stable/c/95c8dd79f3a14df96b3820b35b8399bd91b2be60"
},
{
"url": "https://git.kernel.org/stable/c/49f683b41f28918df3e51ddc0d928cb2e934ccdb",
"refsource": "MISC",
"name": "https://git.kernel.org/stable/c/49f683b41f28918df3e51ddc0d928cb2e934ccdb"
}
]
},
"generator": {
"engine": "bippy-9e1c9544281a"
}
}
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