CVE-2026-62434 PoD: Don't try to reclaim special pages
A malicious guest can corrupt Xen memory management state by reclaiming special pages when Populated on Demand is enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-62434?
CVE-2026-62434 is a medium-severity memory corruption vulnerability in Xen, published on 28 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-787
Which versions are affected by CVE-2026-62434?
How do I fix CVE-2026-62434?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-62434 being exploited?
There is no known exploitation of CVE-2026-62434 in the wild and no public exploit code.
Sources
Also known as ALPINE-CVE-2026-62434, DEBIAN-CVE-2026-62434, GHSA-q4cr-q8pj-wgf3, UBUNTU-CVE-2026-62434.