CVE-2026-62434: A guest started with Populated on Demand enabled (PoD) can attempt to reclaim pages which aren't regular guest RAM. This can cause corruption of memory management state in Xen.

mediumCVSS 5.3CVE-2026-62434

A guest started with Populated on Demand enabled (PoD) can attempt to reclaim pages which aren't regular guest RAM. This can cause corruption of memory management state in Xen.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: medium — CVSS 5.3
Published: 2026-07-28
Last updated: 2026-07-28
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-62434

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-2026-624340.33% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 25% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-62434	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

high[NEW] [high] Xen: Multiple vulnerabilitiescert-bund
unknownXen Multiple Vulnerabilitieshkcert
unknownCitrix XenServer Multiple Vulnerabilitieshkcert
unknownMultiple Vulnerabilities in Citrix XenServer (July 29, 2026)cert-fr-avis
unknownMultiple Vulnerabilities in Xen (July 29, 2026)cert-fr-avis

Recent advisories for A guest started

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.

mediumCVE-2026-62429: Accessing the vNUMA configuration data of a guest is still possible when domain destruction ha…nvd · 2026-07-28