Kernel: kvm: svm: improper check in svm_set_x2apic_msr_interception allows direct access to host x2apic msrs

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Summary

CVECVE-2023-5090
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-11-06 11:15:09 UTC
Updated2026-08-06 22:16:38 UTC
DescriptionA flaw was found in KVM. An improper check in svm_set_x2apic_msr_interception() may allow direct access to host x2apic msrs when the guest resets its apic, potentially leading to a denial of service condition.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

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

EPSS: 0.002340000 probability, percentile 0.142270000 (date 2026-08-09)

Problem Types: CWE-755 | CWE-755 Improper Handling of Exceptional Conditions

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.1[email protected]Secondary6MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
3.1CNACVSS6MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel 6.6 rc1 All All
Operating System Linux Linux Kernel 6.6 rc2 All All
Operating System Linux Linux Kernel 6.6 rc3 All All
Operating System Linux Linux Kernel 6.6 rc4 All All
Operating System Linux Linux Kernel 6.6 rc5 All All
Operating System Linux Linux Kernel 6.6 rc6 All All
Operating System Linux Linux Kernel All All All All
Operating System Redhat Enterprise Linux 8.0 All All All
Operating System Redhat Enterprise Linux 9.0 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Red Hat Red Hat Enterprise Linux 8 unaffected 0:4.18.0-553.8.1.rt7.349.el8_10 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8 unaffected 0:4.18.0-553.8.1.el8_10 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9 unaffected 0:5.14.0-427.16.1.el9_4 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9 unaffected 0:5.14.0-427.16.1.el9_4 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support unaffected 0:5.14.0-284.69.1.el9_2 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support unaffected 0:5.14.0-284.69.1.rt14.354.el9_2 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 6 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 7 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 7 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 9 Not specified Not specified

References

ReferenceSourceLinkTags
access.redhat.com/errata/RHSA-2024:2758 [email protected] access.redhat.com
access.redhat.com/errata/RHSA-2024:3854 af854a3a-2127-422b-91ae-364da2661108 access.redhat.com
access.redhat.com/errata/RHSA-2024:4352 af854a3a-2127-422b-91ae-364da2661108 access.redhat.com
access.redhat.com/errata/RHSA-2024:4211 af854a3a-2127-422b-91ae-364da2661108 access.redhat.com
2248122 – (CVE-2023-5090) CVE-2023-5090 kernel: KVM: SVM: improper check in svm_set_x2apic_msr_interception allows direct access to host x2apic msrs af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com Issue Tracking, Patch
access.redhat.com/errata/RHSA-2024:3855 af854a3a-2127-422b-91ae-364da2661108 access.redhat.com
cve-details af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: This issue was discovered by Maxim Levitsky (Red Hat). (en)

Additional Advisory Data

SourceTimeEvent
CNA2023-09-20T00:00:00.000ZReported to Red Hat.
CNA2023-09-28T00:00:00.000ZMade public.

Workarounds

CNA: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Legacy QID Mappings

  • 160978 Oracle Enterprise Linux Security Update for unbreakable enterprise kernel (ELSA-2023-12874)
  • 160982 Oracle Enterprise Linux Security Update for unbreakable enterprise kernel-container (ELSA-2023-12911)
  • 160985 Oracle Enterprise Linux Security Update for unbreakable enterprise kernel-container (ELSA-2023-12910)
  • 161237 Oracle Enterprise Linux Security Update for unbreakable enterprise kernel (ELSA-2023-13043)
  • 199929 Ubuntu Security Notification for Linux kernel (OEM) Vulnerabilities (USN-6497-1)
  • 199933 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6502-1)
  • 199938 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6503-1)
  • 199952 Ubuntu Security Notification for Linux kernel (Oracle) Vulnerabilities (USN-6502-2)
  • 199957 Ubuntu Security Notification for Linux kernel (StarFive) Vulnerabilities (USN-6520-1)
  • 199958 Ubuntu Security Notification for Linux kernel (NVIDIA) Vulnerabilities (USN-6502-3)
  • 199973 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6502-4)
  • 199982 Ubuntu Security Notification for Linux kernel (GCP) Vulnerability (USN-6537-1)
  • 356908 Amazon Linux Security Advisory for kernel : ALAS2023-2023-430
  • 356919 Amazon Linux Security Advisory for kernel-livepatch : ALAS2023LIVEPATCH-2023-026
  • 356921 Amazon Linux Security Advisory for kernel-livepatch : ALAS2023LIVEPATCH-2023-022
  • 356922 Amazon Linux Security Advisory for kernel-livepatch : ALAS2023LIVEPATCH-2023-023
  • 356923 Amazon Linux Security Advisory for kernel-livepatch : ALAS2023LIVEPATCH-2023-024
  • 356924 Amazon Linux Security Advisory for kernel-livepatch : ALAS2023LIVEPATCH-2023-025
  • 356925 Amazon Linux Security Advisory for kernel-livepatch : ALAS2023LIVEPATCH-2023-021
  • 6140012 AWS Bottlerocket Security Update for kernel (GHSA-h793-mm5x-7p69)
  • 6140051 AWS Bottlerocket Security Update for kernel (GHSA-h793-mm5x-7p69)

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