HighCVE-2025-54518

AMD: Improper Isolation of Shared Resources on System-on-a-Chip (SoC) (CVE-2025-54518)

Published 15.05.2026Last modified 10.09.2026Sources: SUSE, Ubuntu, Red Hat, BSI, Debian LTS, Debian, EUVD, Msrc Update Guide, CVE.org

What is affected, what to do

Improper isolation of shared resources within the CPU operation cache on Zen 2-based products could allow an attacker to corrupt instructions executed at a different privilege level, potentially resulting in privilege escalation.

Update IBM QRadar SIEM to version 7.6.0.3.

Affected: IBM QRadar SIEM < *..7.6.0.3
IBM QRadar SIEM range_unparsed *..<7.5.0 UP16 IF01
Google Cloud Platform = Compute Engine..Compute Engine
AMD Prozessor = EPYC..EPYC
AMD Prozessor = Ryzen..Ryzen
open source Xen = 4.17-4.21..4.17-4.21
Fixed in: IBM QRadar SIEM 7.6.0.3

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Metrics

7.3

Priority

XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

Source: NVD, CVSS v4

7.0

CVSS v3

Severity High on the scale from 0 to 10.

Source: SUSE, Ubuntu, Red Hat, BSI, Debian LTS, Debian, EUVD, Msrc Update Guide, CVE.org

0.3 %

EPSS score

Low — model estimates < 1% exploitation likelihood.

Source: FIRST EPSS, percentile 21.1

Show all metrics

Severity: High
Priority (0–325) The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first? Read in glossary: 57.58 Methodology
Exploit maturity An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack. Read in glossary: no public PoC known
XIEM Effective CVSS XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command. Read in glossary: 7.3 Methodology
CVSS v3 CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions. Read in glossary: 7.0
CVSS v4 CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions. Read in glossary: 7.3
EPSS score The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“. Read in glossary: 0.3 %; Low — model estimates < 1% exploitation likelihood.
EPSS percentile The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking. Read in glossary: 21.1; Elevated — this CVE ranks above at least 10% of all CVEs scored today.
KEV status The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching. Read in glossary: —
Published: 15.05.2026
CWE CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect. Read in glossary: CWE-1189

Detection rules

No NEOSEC detection rule is available for this vulnerability yet.

Classification under NIS2 and CRA

Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

NIS2 NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management. Read in glossary: High technical severity: assess and remediate the vulnerability in vulnerability handling under Art. 21(2)(e) NIS2 and document the decision.
CRA The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates. Read in glossary: From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
ISO/IEC 27001 ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security. Read in glossary: Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

Description

Source: suse_csaf, Ubuntu Security Notices, redhat_csaf, BSI WID Portal, BSI CSAF, Debian LTS Advisories, Debian Security Advisories, ENISA EUVD, Microsoft Security Update Guide, cvelistv5, NVD (NIST), CVE.org (MITRE)

Affected products

The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

Affected products
		Affected versions	Fixed in
AMD	AMD EPYC™ 7002 Series Processors	`—`	—
AMD	AMD EPYC™ Embedded 7002 Series Processors	`—`	—
AMD	AMD Ryzen Embedded V2000A Series Processors	`—`	—
AMD	AMD Ryzen™ 3000 Series Desktop Processors	`—`	—
AMD	AMD Ryzen™ 4000 Series Desktop Processors	`—`	—
AMD	AMD Ryzen™ 4000 Series Mobile Processors with Radeon™ Graphics	`—`	—
AMD	AMD Ryzen™ 5000 Series Desktop Processors with Radeon™ Graphics	`—`	—
AMD	AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics	`—`	—
AMD	AMD Ryzen™ 7020 Series Processors with Radeon™ Graphics	`—`	—
AMD	AMD Ryzen™ 7030 Series Mobile Processors with Radeon™ Graphics	`—`	—
AMD	AMD Ryzen™ Embedded V2000 Series Processors	`—`	—
AMD	AMD Ryzen™ Threadripper™ PRO 3000 WX-Series Processors	`—`	—
AMD	Prozessor	`EPYC` `Ryzen`	— —
Google	Cloud Platform	`Compute Engine`	—
IBM	QRadar SIEM	`< 7.6.0.3` `<7.5.0 UP16 IF01`	`7.6.0.3` —
Open Source	Xen	`4.17-4.21`	—

Vendors and products

Affected operating systems

Affected operating systems

Linux	ubuntu	linux-oracle-7.0	`noble`
Linux	debian	xen	`bookworm`
Linux	debian	xen	`trixie`

Weakness classes (CWE)

CWE-1189Improper Isolation of Shared Resources on System-on-a-Chip (SoC)
Base
The System-On-a-Chip (SoC) does not properly isolate shared resources between trusted and untrusted agents.
Entry at MITRE CWE-1189

References & sources

amd.comen/resources/product-security/bulletin/AMD-SB-7052.html
openwall.comlists/oss-security/2026/05/12/15
xenbits.xen.orgxsa/advisory-490.html
access.redhat.comsecurity/cve/CVE-2025-54518Vulnerability database, x_refsource_REDHAT
bugzilla.redhat.comRHBZ#2477784Issue tracking, x_refsource_REDHAT
security.access.redhat.comdata/csaf/v2/vex/2025/cve-2025-54518.jsonx_sadp-csaf-vex
access.redhat.comerrata/RHSA-2026:50978Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:50979Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:53329Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:53990Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:53989Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:54769Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:56573Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:55444Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:59091Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:57543Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:57457Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:57402Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:59831Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:60019Vendor advisory, x_refsource_REDHAT

Changes to this CVE

Who changed this CVE and when: NVD (analysis, affected products, CVSS), the CVE publisher (CNA) and additional providers such as CISA (ADP).

10.09.2026Record modifiedRed Hat ADP

New references:

https://access.redhat.com/errata/RHSA-2026:62549

Show 2 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	added	—	Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2025/54xxx/CVE-2025-54518.json">CVE-2025-54518</a>
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:62549