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cveRedhatCVE-2021-4032
HistoryJan 21, 2022 - 7:15 p.m.

CVE-2021-4032

2022-01-2119:15:09
CWE-459
redhat
web.nvd.nist.gov
63
cve-2021-4032
linux kernel
kvm subsystem
denial of service
memory errors
nvd

CVSS2

4.9

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:N/I:N/A:C

CVSS3

4.4

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

AI Score

4.3

Confidence

High

EPSS

0.001

Percentile

36.2%

JSON

A vulnerability was found in the Linux kernel’s KVM subsystem in arch/x86/kvm/lapic.c kvm_free_lapic when a failure allocation was detected. In this flaw the KVM subsystem may crash the kernel due to mishandling of memory errors that happens during VCPU construction, which allows an attacker with special user privilege to cause a denial of service. This flaw affects kernel versions prior to 5.15 rc7.

Affected configurations

Nvd
Vulners
Node
linuxlinux_kernelRange≤5.14
OR
linuxlinux_kernelMatch5.15-
OR
linuxlinux_kernelMatch5.15rc1
OR
linuxlinux_kernelMatch5.15rc2
OR
linuxlinux_kernelMatch5.15rc3
OR
linuxlinux_kernelMatch5.15rc4
OR
linuxlinux_kernelMatch5.15rc5
OR
linuxlinux_kernelMatch5.15rc6
VendorProductVersionCPE
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel5.15cpe:2.3:o:linux:linux_kernel:5.15:-:*:*:*:*:*:*
linuxlinux_kernel5.15cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*
linuxlinux_kernel5.15cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*
linuxlinux_kernel5.15cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*
linuxlinux_kernel5.15cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:*
linuxlinux_kernel5.15cpe:2.3:o:linux:linux_kernel:5.15:rc5:*:*:*:*:*:*
linuxlinux_kernel5.15cpe:2.3:o:linux:linux_kernel:5.15:rc6:*:*:*:*:*:*

CNA Affected

[
  {
    "product": "kernel",
    "vendor": "n/a",
    "versions": [
      {
        "status": "affected",
        "version": "kernel 5.15 rc7"
      }
    ]
  }
]

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CVSS2

4.9

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:N/I:N/A:C

CVSS3

4.4

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

AI Score

4.3

Confidence

High

EPSS

0.001

Percentile

36.2%

JSON
Related for CVE-2021-4032
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