[UPDATE] [medium] Xen: Multiple vulnerabilities
A local attacker can exploit multiple vulnerabilities in Xen to gain elevated privileges, manipulate data, disclose confidential information, or cause a Denial-of-Service condition.
CSIRTS triage
- What
- Multiple vulnerabilities allow a local attacker to gain elevated privileges, manipulate data, disclose confidential information, or cause a Denial-of-Service condition.
- Who is affected
- Deployments using Xen are affected.
- Urgency
- Remediation is medium urgency due to the potential for serious impacts.
- Action
- Update Xen to the latest version.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1851
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-424870.10% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 1% of all scored CVEs.
- Low exploitation riskCVE-2026-424890.08% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 0% of all scored CVEs.
- Low exploitation riskCVE-2026-424900.20% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 10% of all scored CVEs.
- Low exploitation riskCVE-2025-102630.55% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 43% of all scored CVEs.
- Low exploitation riskCVE-2026-424880.35% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 28% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-42487 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-42489 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-42490 | coverage & exploitation status | NVD · CVE.org |
| CVE-2025-10263 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-42488 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- unknownMultiples vulnérabilités dans le noyau Linux de Red Hat (31 juillet 2026)cert-fr-avis
- medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilitiescert-bund
- high[UPDATE] [high] AMD ARM and EPYC processors: Multiple vulnerabilitiescert-bund
- high[UPDATE] [high] Microsoft Windows: Multiple vulnerabilitiescert-bund
- unknownMultiple vulnerabilities in Red Hat Linux kernel (July 10, 2026)cert-fr-avis
- unknownDebian Linux Kernel Multiple Vulnerabilitieshkcert
- unknownMultiple vulnerabilities in Red Hat Linux kernel (July 3, 2026)cert-fr-avis
- unknownSUSE Linux Kernel Multiple Vulnerabilitieshkcert
- unknownRedHat Linux Kernel Multiple Vulnerabilitieshkcert
- criticalCVE-2025-10263: ARM: CVE-2025-10263 Completion of affected memory accesses might not be guaranteed by completi…msrc
Recent advisories for Xen
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- high[NEW] [high] Xen: Multiple vulnerabilitiescert-bund · 2026-07-31
- high[UPDATE] [high] Xen and Citrix Systems XenServer: Multiple vulnerabilitiescert-bund · 2026-07-30
- unknownXen Multiple Vulnerabilitieshkcert · 2026-07-30
- unknownMultiple Vulnerabilities in Xen (July 29, 2026)cert-fr-avis · 2026-07-29
- mediumCVE-2026-62434: A guest started with Populated on Demand enabled (PoD) can attempt to reclaim pages which aren…nvd · 2026-07-28
- highCVE-2026-62430: Accesses to the CMOS memory contents are done using an indirect IO port pair. Therefore Xen ne…nvd · 2026-07-28
More from CERT-Bund (BSI) Security Advisories
- medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilities allow denial of service2026-07-31
- medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilities allow Denial of Service2026-07-31
- medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilities2026-07-31
- medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilities allow denial of service2026-07-31
- medium[UPDATE] [medium] Linux Kernel (ntfs3): Vulnerability allows information disclosure2026-07-31