CVE-2026-62434

EUVD-2026-49787
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.3 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 31.04%
Debian logo
Debian Releases
Debian Product
Codename
xen
bookworm
vulnerable
bookworm (security)
vulnerable
forky
4.20.3+127-gc42374a105-1
fixed
sid
4.20.3+127-gc42374a105-1
fixed
trixie
vulnerable
trixie (security)
4.20.3+127-gc42374a105-0+deb13u1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
xen
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
resolute
needs-triage
xenial
needs-triage
Common Weakness Enumeration
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