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Advisory severityMedium5.5Red Hat Linux

Medium [CVE-2022-1852] NULL pointer dereference flaw was found in the Linux kernel’s KVM module, which can lead to a denial of service in the x86_emulate_insn in arch/x86/kvm/emulate.c

This medium-severity Red Hat Linux advisory covers CVE-2022-1852 affecting Red Hat Enterprise Linux 8.6 Extended Update Support, Red Hat Enterprise Linux 9, Red Hat Virtualization 4 for Red Hat Enterprise Linux 8.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2022-1852 Source published Source updated

VulniPulse record published

CVE-2022-1852
Affected products & platforms
Red Hat LinuxLinux Kernel
Open source advisory

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Summary

A NULL pointer dereference flaw was found in the Linux kernel’s KVM module, which can lead to a denial of service in the x86_emulate_insn in arch/x86/kvm/emulate.c. This flaw occurs while executing an illegal instruction in guest in the Intel CPU.

Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-476.

Affected Red Hat products: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 8.6 Extended Update Support; Red Hat Enterprise Linux 9; Red Hat Virtualization 4 for Red Hat Enterprise Linux 8. Red Hat lists Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7 as not affected.

Red Hat fixing advisory: RHSA-2022:7444, RHSA-2022:7683, RHSA-2024:1877, RHSA-2022:8267, RHSA-2022:7933.

Affected products named by the advisory: Red Hat package: kernel-rt.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.

Official advisory · high-confidence parse· fetched 12 hours ago·verify at source

Fixed versions
  • kernel-rt-0:4.18.0-425.3.1.rt7.213.el8
  • kernel-0:4.18.0-425.3.1.el8
  • kernel-0:4.18.0-372.100.1.el8_6
  • kernel-0:5.14.0-162.6.1.el9_1
  • kernel-rt-0:5.14.0-162.6.1.rt21.168.el9_1
  • RHSA-2022:7444
  • RHSA-2022:7683
  • RHSA-2024:1877
  • RHSA-2022:8267
  • RHSA-2022:7933

Official advisory · high-confidence parse· fetched 12 hours ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • This flaw can be mitigated by preventing the affected KVM module from loading during the boot time, and ensuring the module is added to the blacklist file. ~~~ Refer: How do I blacklist a kernel module to prevent it from loading automatically? https://access.redhat.com/solutions/41278 ~~~

Official advisory · high-confidence parse· fetched 12 hours ago·verify at source

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