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CVE-2023-5090· NVD / CVE Program· CNA redhat

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

A 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.

MediumCVSS 5.5 · v3.1—No exploit Fix available

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Published
Nov 6, 2023
Updated
Aug 6, 2026
EPSS
0.2% · 14th percentile
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Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CNA vs NVD score

NVD
5.5
CNA · redhat
6.0
0.5 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

VendorProduct
linuxlinux kernel
redhatenterprise linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernelup to 6.5 inclusive
  • linux linux kernel6.6
  • redhat enterprise linux8.0
  • redhat enterprise linux9.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • Red Hat Red Hat Enterprise Linux 6

    • all versionsunknown
  • Red Hat Red Hat Enterprise Linux 7

    • all versionsunknown
    • all versionsunknown
  • Red Hat Red Hat Enterprise Linux 8

    • 0:4.18.0-553.8.1.rt7.349.el8_10 and laternot affected · rpm
    • 0:4.18.0-553.8.1.el8_10 and laternot affected · rpm
  • Red Hat Red Hat Enterprise Linux 9

    • 0:5.14.0-427.16.1.el9_4 and laternot affected · rpm
    • 0:5.14.0-427.16.1.el9_4 and laternot affected · rpm
    • all versionsaffected
  • Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support

    • 0:5.14.0-284.69.1.el9_2 and laternot affected · rpm
    • 0:5.14.0-284.69.1.rt14.354.el9_2 and laternot affected · rpm

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:8bpftoolbefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernelbefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-abi-stablelistsbefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-corebefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-cross-headersbefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-debugbefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-debug-corebefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-debug-develbefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-debug-modulesbefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-debug-modules-extrabefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-develbefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-docbefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-headersbefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-modulesbefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-modules-extrabefore 4.18.0-553.8.1.el8_104.18.0-553.8.1.el8_10
AlmaLinux:8kernel-rtbefore 4.18.0-553.8.1.rt7.349.el8_104.18.0-553.8.1.rt7.349.el8_10
AlmaLinux:8kernel-rt-corebefore 4.18.0-553.8.1.rt7.349.el8_104.18.0-553.8.1.rt7.349.el8_10
AlmaLinux:8kernel-rt-debugbefore 4.18.0-553.8.1.rt7.349.el8_104.18.0-553.8.1.rt7.349.el8_10
AlmaLinux:8kernel-rt-debug-corebefore 4.18.0-553.8.1.rt7.349.el8_104.18.0-553.8.1.rt7.349.el8_10
AlmaLinux:8kernel-rt-debug-develbefore 4.18.0-553.8.1.rt7.349.el8_104.18.0-553.8.1.rt7.349.el8_10
AlmaLinux:8kernel-rt-debug-kvmbefore 4.18.0-553.8.1.rt7.349.el8_104.18.0-553.8.1.rt7.349.el8_10
AlmaLinux:8kernel-rt-debug-modulesbefore 4.18.0-553.8.1.rt7.349.el8_104.18.0-553.8.1.rt7.349.el8_10
AlmaLinux:8kernel-rt-debug-modules-extrabefore 4.18.0-553.8.1.rt7.349.el8_104.18.0-553.8.1.rt7.349.el8_10
AlmaLinux:8kernel-rt-develbefore 4.18.0-553.8.1.rt7.349.el8_104.18.0-553.8.1.rt7.349.el8_10

+96

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Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
almalinux:bpftool4.18.0-553.8.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel4.18.0-553.8.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-abi-stablelists4.18.0-553.8.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-core4.18.0-553.8.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-cross-headers4.18.0-553.8.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug4.18.0-553.8.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-core4.18.0-553.8.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-devel4.18.0-553.8.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-modules4.18.0-553.8.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-modules-extra4.18.0-553.8.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-devel4.18.0-553.8.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-doc4.18.0-553.8.1.el8_10 · AlmaLinux:8Package registry (OSV)
debian:linux6.1.64-1 · Debian:12Package registry (OSV)
red hat:bpftool-debuginfo0:7.3.0-427.16.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-debuginfo0:5.14.0-427.16.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel0:5.14.0-427.16.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel-matched0:5.14.0-427.16.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debuginfo0:5.14.0-427.16.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel0:5.14.0-427.16.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel-matched0:5.14.0-427.16.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-debuginfo0:5.14.0-427.16.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-devel0:5.14.0-427.16.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-devel-matched0:5.14.0-427.16.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debuginfo0:5.14.0-427.16.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debuginfo-common-aarch640:5.14.0-427.16.1.el9_4 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
rocky linux:kernel0:4.18.0-553.8.1.el8_10 · Rocky Linux:8Package registry (OSV)
rocky linux:kernel-rt0:4.18.0-553.8.1.rt7.349.el8_10 · Rocky Linux:8Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2022-4861966 days apartAn issue was discovered in drivers/input/input.c in the Linux kernel before 5.17.10.
    22Monitor
  • CVE-2024-26584107 days apartnet: tls: handle backlogging of crypto requests
    22Monitor
  • CVE-2021-46928113 days apartparisc: Clear stale IIR value on instruction access rights trap
    22Monitor
  • CVE-2022-48673179 days apartnet/smc: Fix possible access to freed memory in link clear
    22Monitor
  • CVE-2024-50001350 days apartnet/mlx5: Fix error path in multi-packet WQE transmit
    22Monitor
  • CVE-2024-50002350 days apartstatic_call: Handle module init failure correctly in static_call_del_module()
    22Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

All records