In the Linux kernel, the following vulnerability has been resolved: x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache… (CVE-2026-46174)
In the Linux kernel, the following vulnerability has been resolved: x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache Make sure resources are not improperly shared in the op cache and cause instruction corruption this way.
AI Analysis
Technical Summary
The Linux kernel contained a vulnerability related to improper isolation of shared resources in the AMD Zen2 CPU operation cache. This could cause instruction corruption by allowing resources to be improperly shared. The issue was addressed by ensuring proper resource isolation in the operation cache. The vulnerability affects Ubuntu Linux kernels prior to versions 5.15.0-1112.119~20.04.1, 5.15.0-1117.126~20.04.1, 5.15.0-1117.126~20.04.2, 5.15.0-186.196~20.04.1, and 5.15.0-1106.110~20.04.1. The CVSS 3.1 vector indicates a critical severity with local attack vector, low attack complexity, low privileges required, no user interaction, scope changed, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation could lead to corruption of instructions executed by the CPU, potentially compromising system confidentiality, integrity, and availability. The vulnerability is critical due to the high impact on these security properties. No known exploits in the wild have been reported.
Mitigation Recommendations
Fixes have been released in Linux kernel versions 5.15.0-1112.119~20.04.1 and later. Users should update their Linux kernel to these or newer patched versions to remediate the vulnerability. Since this is a kernel-level issue, applying the official kernel updates from the vendor is the recommended mitigation.
In the Linux kernel, the following vulnerability has been resolved: x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache… (CVE-2026-46174)
Description
In the Linux kernel, the following vulnerability has been resolved: x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache Make sure resources are not improperly shared in the op cache and cause instruction corruption this way.
CVSS v3.1
Score 8.8high
Affected software
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protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resoluteRun on your own infrastructure? 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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel contained a vulnerability related to improper isolation of shared resources in the AMD Zen2 CPU operation cache. This could cause instruction corruption by allowing resources to be improperly shared. The issue was addressed by ensuring proper resource isolation in the operation cache. The vulnerability affects Ubuntu Linux kernels prior to versions 5.15.0-1112.119~20.04.1, 5.15.0-1117.126~20.04.1, 5.15.0-1117.126~20.04.2, 5.15.0-186.196~20.04.1, and 5.15.0-1106.110~20.04.1. The CVSS 3.1 vector indicates a critical severity with local attack vector, low attack complexity, low privileges required, no user interaction, scope changed, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation could lead to corruption of instructions executed by the CPU, potentially compromising system confidentiality, integrity, and availability. The vulnerability is critical due to the high impact on these security properties. No known exploits in the wild have been reported.
Mitigation Recommendations
Fixes have been released in Linux kernel versions 5.15.0-1112.119~20.04.1 and later. Users should update their Linux kernel to these or newer patched versions to remediate the vulnerability. Since this is a kernel-level issue, applying the official kernel updates from the vendor is the recommended mitigation.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-46174
- Osv Schema Version
- 1.7.0
- Aliases
- []
- Ecosystems
- ["Ubuntu:Pro:14.04:LTS","Ubuntu:Pro:16.04:LTS","Ubuntu:16.04:LTS","Ubuntu:Pro:FIPS:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:18.04:LTS","Ubuntu:Pro:FIPS-updates:18.04:LTS","Ubuntu:Pro:FIPS:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:20.04:LTS","Ubuntu:Pro:FIPS-updates:20.04:LTS","Ubuntu:Pro:FIPS:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:Nvidia-BlueField:22.04:LTS","Ubuntu:Pro:FIPS-preview:22.04:LTS","Ubuntu:Pro:FIPS-updates:22.04:LTS","Ubuntu:Pro:Realtime:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:Nvidia-BlueField:24.04:LTS","Ubuntu:Pro:FIPS-updates:24.04:LTS","Ubuntu:Pro:Realtime:24.04:LTS","Ubuntu:25.10","Ubuntu:26.04:LTS"]
- Database Specific Severity
- null
- Cvss Version
- 3.1
Threat ID: 6a5a01d891ae9bcd3f82cc92
Added to database: 07/17/2026, 10:20:08 UTC
Last enriched: 07/30/2026, 14:23:39 UTC
Last updated: 07/31/2026, 21:27:38 UTC
Views: 2
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