CVE-2025-58144
Arm issues with page refcounting
In short
A software bug causes the system to try using a memory address that doesn't exist (NULL pointer), which crashes the application. This happens when handling pages that belong to other domains, making the system unstable.
Technical detail
A NULL pointer dereference in page refcounting occurs due to an incorrect assertion when mapping pages from other domains. The vulnerability exists in release builds where the assertion is bypassed, leading to a crash when the code attempts to dereference an invalid pointer without proper validation.
Summary generated and translated by AI from the official description.
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
There are two issues related to the mapping of pages belonging to other
domains: For one, an assertion is wrong there, where the case actually
needs handling. A NULL pointer de-reference could result on a release
build. This is CVE-2025-58144.
And then the P2M lock isn't held until a page reference was actually
obtained (or the attempt to do so has failed). Otherwise the page can
not only change type, but even ownership in between, thus allowing
domain boundaries to be violated. This is CVE-2025-58145.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Xen · XenWant to know if your infrastructure is exposed to this?
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