CVE-2026-62434: PoD: Don't try to reclaim special pages

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-28 · updated 2026-07-28
Weakness: CWE-787

Description

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.

References

https://xenbits.xenproject.org/xsa/advisory-507.html
http://www.openwall.com/lists/oss-security/2026/07/28/23
http://xenbits.xen.org/xsa/advisory-507.html

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