{
  "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    [<ffffffff814948ee>] kmalloc_node include/linux/slab.h:604 [inline]\n    [<ffffffff814948ee>] kvmalloc_node+0x3e/0x100 mm/util.c:580\n    [<ffffffff814950f2>] kvmalloc include/linux/slab.h:732 [inline]\n    [<ffffffff814950f2>] vmemdup_user+0x22/0x100 mm/util.c:199\n    [<ffffffff8109f5ff>] kvm_vcpu_ioctl_set_cpuid2+0x8f/0xf0 arch/x86/kvm/cpuid.c:423\n    [<ffffffff810711b9>] kvm_arch_vcpu_ioctl+0xb99/0x1e60 arch/x86/kvm/x86.c:5251\n    [<ffffffff8103e92d>] kvm_vcpu_ioctl+0x4ad/0x950 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4066\n    [<ffffffff815afacc>] vfs_ioctl fs/ioctl.c:51 [inline]\n    [<ffffffff815afacc>] __do_sys_ioctl fs/ioctl.c:874 [inline]\n    [<ffffffff815afacc>] __se_sys_ioctl fs/ioctl.c:860 [inline]\n    [<ffffffff815afacc>] __x64_sys_ioctl+0xfc/0x140 fs/ioctl.c:860\n    [<ffffffff844a3335>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n    [<ffffffff844a3335>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80\n    [<ffffffff84600068>] 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"
    }
  ]
}