UpHeron
All vulnerabilities

Servers and applications

CVE-2016-4480

The guest_walk_tables function in arch/x86/mm/guest_walk.c in Xen 4.6.x and earlier does not properly handle the Page Size (PS) page table entry bit at the L4 and L3 page table levels, which might allow local guest OS users to gain privileges via a crafted mapping of memory.

Severity
High 8.4
Published
18 May 2016
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
0.5% in the next 30 daysHigher than 46% of CVEs. EPSS by FIRST, 11 Nov 2026
Weakness
CWE-264
Attack
Needs local access · No login needed · No user action needed
Attacker can
Read data · Change data · Take it down
CVSS vector
CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Sources
NVD

Affected software

SoftwareAffected versions
XenServers and applications · cpe:o:xen:xen
  • Every version up to 4.6.1

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2016-4480
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2016-4480