cve-2022-48764
Vulnerability from cvelistv5
Published
2024-06-20 11:13
Modified
2024-12-19 08:07
Severity ?
5.3 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Summary
In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Free kvm_cpuid_entry2 array on post-KVM_RUN KVM_SET_CPUID{,2} Free the "struct kvm_cpuid_entry2" array on successful post-KVM_RUN KVM_SET_CPUID{,2} to fix a memory leak, the callers of kvm_set_cpuid() free the array only on failure. BUG: memory leak unreferenced object 0xffff88810963a800 (size 2048): comm "syz-executor025", pid 3610, jiffies 4294944928 (age 8.080s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 0d 00 00 00 ................ 47 65 6e 75 6e 74 65 6c 69 6e 65 49 00 00 00 00 GenuntelineI.... backtrace: [<ffffffff814948ee>] kmalloc_node include/linux/slab.h:604 [inline] [<ffffffff814948ee>] kvmalloc_node+0x3e/0x100 mm/util.c:580 [<ffffffff814950f2>] kvmalloc include/linux/slab.h:732 [inline] [<ffffffff814950f2>] vmemdup_user+0x22/0x100 mm/util.c:199 [<ffffffff8109f5ff>] kvm_vcpu_ioctl_set_cpuid2+0x8f/0xf0 arch/x86/kvm/cpuid.c:423 [<ffffffff810711b9>] kvm_arch_vcpu_ioctl+0xb99/0x1e60 arch/x86/kvm/x86.c:5251 [<ffffffff8103e92d>] kvm_vcpu_ioctl+0x4ad/0x950 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4066 [<ffffffff815afacc>] vfs_ioctl fs/ioctl.c:51 [inline] [<ffffffff815afacc>] __do_sys_ioctl fs/ioctl.c:874 [inline] [<ffffffff815afacc>] __se_sys_ioctl fs/ioctl.c:860 [inline] [<ffffffff815afacc>] __x64_sys_ioctl+0xfc/0x140 fs/ioctl.c:860 [<ffffffff844a3335>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff844a3335>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [<ffffffff84600068>] entry_SYSCALL_64_after_hwframe+0x44/0xae
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/811f95ff95270e6048197821434d9301e3d7f07c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b9ee734a14bb685b2088f2176d82b34cb4e30dbc
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/811f95ff95270e6048197821434d9301e3d7f07c
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b9ee734a14bb685b2088f2176d82b34cb4e30dbc
Impacted products
Vendor Product Version
Linux Linux Version: 5.16.3   ≤
Show details on NVD website

To clipboard 

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              "attackComplexity": "LOW",
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              "confidentialityImpact": "LOW",
              "integrityImpact": "LOW",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
              "version": "3.1"
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              "content": {
                "id": "CVE-2022-48764",
                "options": [
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                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
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                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-06-20T13:26:56.412300Z",
                "version": "2.0.3"
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
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          "dateUpdated": "2024-08-03T15:25:01.597Z",
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        "title": "CVE Program Container"
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    "cna": {
      "affected": [
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/kvm/cpuid.c"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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          "versions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86: Free kvm_cpuid_entry2 array on post-KVM_RUN KVM_SET_CPUID{,2}\n\nFree the \"struct kvm_cpuid_entry2\" array on successful post-KVM_RUN\nKVM_SET_CPUID{,2} to fix a memory leak, the callers of kvm_set_cpuid()\nfree the array only on failure.\n\n BUG: memory leak\n unreferenced object 0xffff88810963a800 (size 2048):\n  comm \"syz-executor025\", pid 3610, jiffies 4294944928 (age 8.080s)\n  hex dump (first 32 bytes):\n    00 00 00 00 00 00 00 00 00 00 00 00 0d 00 00 00  ................\n    47 65 6e 75 6e 74 65 6c 69 6e 65 49 00 00 00 00  GenuntelineI....\n  backtrace:\n    [\u003cffffffff814948ee\u003e] kmalloc_node include/linux/slab.h:604 [inline]\n    [\u003cffffffff814948ee\u003e] kvmalloc_node+0x3e/0x100 mm/util.c:580\n    [\u003cffffffff814950f2\u003e] kvmalloc include/linux/slab.h:732 [inline]\n    [\u003cffffffff814950f2\u003e] vmemdup_user+0x22/0x100 mm/util.c:199\n    [\u003cffffffff8109f5ff\u003e] kvm_vcpu_ioctl_set_cpuid2+0x8f/0xf0 arch/x86/kvm/cpuid.c:423\n    [\u003cffffffff810711b9\u003e] kvm_arch_vcpu_ioctl+0xb99/0x1e60 arch/x86/kvm/x86.c:5251\n    [\u003cffffffff8103e92d\u003e] kvm_vcpu_ioctl+0x4ad/0x950 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4066\n    [\u003cffffffff815afacc\u003e] vfs_ioctl fs/ioctl.c:51 [inline]\n    [\u003cffffffff815afacc\u003e] __do_sys_ioctl fs/ioctl.c:874 [inline]\n    [\u003cffffffff815afacc\u003e] __se_sys_ioctl fs/ioctl.c:860 [inline]\n    [\u003cffffffff815afacc\u003e] __x64_sys_ioctl+0xfc/0x140 fs/ioctl.c:860\n    [\u003cffffffff844a3335\u003e] do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n    [\u003cffffffff844a3335\u003e] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80\n    [\u003cffffffff84600068\u003e] entry_SYSCALL_64_after_hwframe+0x44/0xae"
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        {
          "url": "https://git.kernel.org/stable/c/811f95ff95270e6048197821434d9301e3d7f07c"
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      "title": "KVM: x86: Free kvm_cpuid_entry2 array on post-KVM_RUN KVM_SET_CPUID{,2}",
      "x_generator": {
        "engine": "bippy-5f407fcff5a0"
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-48764",
    "datePublished": "2024-06-20T11:13:41.170Z",
    "dateReserved": "2024-06-20T11:09:39.060Z",
    "dateUpdated": "2024-12-19T08:07:16.858Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-48764\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-06-20T12:15:14.450\",\"lastModified\":\"2024-11-21T07:33:58.503\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nKVM: x86: Free kvm_cpuid_entry2 array on post-KVM_RUN KVM_SET_CPUID{,2}\\n\\nFree the \\\"struct kvm_cpuid_entry2\\\" array on successful post-KVM_RUN\\nKVM_SET_CPUID{,2} to fix a memory leak, the callers of kvm_set_cpuid()\\nfree the array only on failure.\\n\\n BUG: memory leak\\n unreferenced object 0xffff88810963a800 (size 2048):\\n  comm \\\"syz-executor025\\\", pid 3610, jiffies 4294944928 (age 8.080s)\\n  hex dump (first 32 bytes):\\n    00 00 00 00 00 00 00 00 00 00 00 00 0d 00 00 00  ................\\n    47 65 6e 75 6e 74 65 6c 69 6e 65 49 00 00 00 00  GenuntelineI....\\n  backtrace:\\n    [\u003cffffffff814948ee\u003e] kmalloc_node include/linux/slab.h:604 [inline]\\n    [\u003cffffffff814948ee\u003e] kvmalloc_node+0x3e/0x100 mm/util.c:580\\n    [\u003cffffffff814950f2\u003e] kvmalloc include/linux/slab.h:732 [inline]\\n    [\u003cffffffff814950f2\u003e] vmemdup_user+0x22/0x100 mm/util.c:199\\n    [\u003cffffffff8109f5ff\u003e] kvm_vcpu_ioctl_set_cpuid2+0x8f/0xf0 arch/x86/kvm/cpuid.c:423\\n    [\u003cffffffff810711b9\u003e] kvm_arch_vcpu_ioctl+0xb99/0x1e60 arch/x86/kvm/x86.c:5251\\n    [\u003cffffffff8103e92d\u003e] kvm_vcpu_ioctl+0x4ad/0x950 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4066\\n    [\u003cffffffff815afacc\u003e] vfs_ioctl fs/ioctl.c:51 [inline]\\n    [\u003cffffffff815afacc\u003e] __do_sys_ioctl fs/ioctl.c:874 [inline]\\n    [\u003cffffffff815afacc\u003e] __se_sys_ioctl fs/ioctl.c:860 [inline]\\n    [\u003cffffffff815afacc\u003e] __x64_sys_ioctl+0xfc/0x140 fs/ioctl.c:860\\n    [\u003cffffffff844a3335\u003e] do_syscall_x64 arch/x86/entry/common.c:50 [inline]\\n    [\u003cffffffff844a3335\u003e] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80\\n    [\u003cffffffff84600068\u003e] entry_SYSCALL_64_after_hwframe+0x44/0xae\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: KVM: x86: Libere la matriz kvm_cpuid_entry2 en KVM_RUN KVM_SET_CPUID{,2} posterior a KVM_RUN KVM_SET_CPUID{,2} Libere la matriz \\\"struct kvm_cpuid_entry2\\\" en KVM_RUN KVM_SET_CPUID{,2} posterior a \u00e9xito para corregir una p\u00e9rdida de memoria , las personas que llaman a kvm_set_cpuid() liberan la matriz solo en caso de falla. ERROR: p\u00e9rdida de memoria, objeto sin referencia 0xffff88810963a800 (size 2048): comm \\\"syz-executor025\\\", pid 3610, jiffies 4294944928 (age 8.080s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 0d 00 00 00 ................ 47 65 6e 75 6e 74 65 6c 69 6e 65 49 00 00 00 00 GenuntelineI.... backtrace: [] kmalloc_node include/linux/slab.h:604 [inline] [] kvmalloc_node+0x3e/0x100 mm/util.c:580 [] kvmalloc include/linux/slab.h:732 [inline] [] vmemdup_user+0x22/0x100 mm/util.c:199 [] kvm_vcpu_ioctl_set_cpuid2+0x8f/0xf0 arch/x86/kvm/cpuid.c:423 [] kvm_arch_vcpu_ioctl+0xb99/0x1e60 arch/x86/kvm/x86.c:5251 [] kvm_vcpu_ioctl+0x4ad/0x950 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4066 [] vfs_ioctl fs/ioctl.c:51 [inline] [] __do_sys_ioctl fs/ioctl.c:874 [inline] [] __se_sys_ioctl fs/ioctl.c:860 [inline] [] __x64_sys_ioctl+0xfc/0x140 fs/ioctl.c:860 [] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [] entry_SYSCALL_64_after_hwframe+0x44/0xae \"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L\",\"baseScore\":5.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":1.8,\"impactScore\":3.4}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/811f95ff95270e6048197821434d9301e3d7f07c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b9ee734a14bb685b2088f2176d82b34cb4e30dbc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/811f95ff95270e6048197821434d9301e3d7f07c\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/b9ee734a14bb685b2088f2176d82b34cb4e30dbc\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}"
  }
}


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