CVE-2021-4032

CVSS V2 Medium 4.9 CVSS V3 Medium 4.4
Description
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.
Overview
  • CVE ID
  • CVE-2021-4032
  • Assigner
  • secalert@redhat.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2022-01-21T19:15:09
  • Last Modified Date
  • 2022-01-28T14:52:46
Weakness Enumerations
CWE URL
CWE-459 http://cwe.mitre.org/data/definitions/459.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 1 OR 5.14
cpe:2.3:o:linux:linux_kernel:5.15:-:*:*:*:*:*:* 1 OR
cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:* 1 OR
cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:* 1 OR
cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:* 1 OR
cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:* 1 OR
cpe:2.3:o:linux:linux_kernel:5.15:rc5:*:*:*:*:*:* 1 OR
cpe:2.3:o:linux:linux_kernel:5.15:rc6:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:L/AC:L/Au:N/C:N/I:N/A:C
  • Access Vector
  • LOCAL
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • NONE
  • Availability Impact
  • COMPLETE
  • Base Score
  • 4.9
  • Severity
  • MEDIUM
  • Exploitability Score
  • 3.9
  • Impact Score
  • 6.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
  • Attack Vector
  • LOCAL
  • Attack Compatibility
  • LOW
  • Privileges Required
  • HIGH
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • HIGH
  • Base Score
  • 4.4
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 0.8
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://bugzilla.redhat.com/show_bug.cgi?id=2027403 Issue Tracking Patch Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f7d8a19f9a056a05c5c509fa65af472a322abfee Exploit Patch Third Party Advisory
https://lkml.org/lkml/2021/9/8/587 Exploit Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-4032
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4032
History
Created Old Value New Value Data Type Notes
2022-05-10 06:35:55 Added to TrackCVE
2022-12-06 07:26:13 2022-01-21T19:15Z 2022-01-21T19:15:09 CVE Published Date updated
2022-12-06 07:26:13 2022-01-28T14:52:46 CVE Modified Date updated
2022-12-06 07:26:13 Analyzed Vulnerability Status updated