Bug 2394576 (CVE-2025-58145)

Summary: CVE-2025-58145 xen: Arm issues with page refcounting
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedKeywords: Security
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2395131, 2395132    
Bug Blocks:    

Description OSIDB Bzimport 2025-09-11 15:01:30 UTC 
[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.