{"id":"CVE-2025-58149","url":"https://www.cyber-defence.io/tools/cve/CVE-2025-58149","generatedAt":"2026-10-28T02:13:57.249Z","title":"For PV domains the permission leak allows the domain itself to map the memory in the page-tables.","description":"When passing through PCI devices, the detach logic in libxl won't remove\naccess permissions to any 64bit memory BARs the device might have.  As a\nresult a domain can still have access any 64bit memory BAR when such\ndevice is no longer assigned to the domain.\n\nFor PV domains the permission leak allows the domain itself to map the memory\nin the page-tables.  For HVM it would require a compromised device model or\nstubdomain to map the leaked memory into the HVM domain p2m.","published":"2025-10-31T12:15:35.000Z","lastModified":"2026-10-19T13:10:00.000Z","status":"Analyzed","sourceIdentifier":"security@xen.org","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},"cwe":["CWE-672"],"affected":["xen/xen"],"epss":{"score":0.00435,"percentile":0.37498,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.43%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://xenbits.xenproject.org/xsa/advisory-476.html","tags":["Patch","Vendor Advisory"],"source":"security@xen.org"},{"url":"http://www.openwall.com/lists/oss-security/2025/10/24/1","tags":["Mailing List","Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://xenbits.xen.org/xsa/advisory-476.html","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-58149","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}