UpHeron
All vulnerabilities

Servers and applications

CVE-2015-7835

The mod_l2_entry function in arch/x86/mm.c in Xen 3.4 through 4.6.x does not properly validate level 2 page table entries, which allows local PV guest administrators to gain privileges via a crafted superpage mapping.

Severity
High 7.2
Published
30 Oct 2015
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
0.4% in the next 30 daysHigher than 37% of CVEs. EPSS by FIRST, 11 Nov 2026
Weakness
Improper input validation (CWE-20)CWE-264
Attack
Needs local access · No login needed
Attacker can
Read data · Change data · Take it down
CVSS vector
AV:L/AC:L/Au:N/C:C/I:C/A:C
Sources
NVD

Affected software

SoftwareAffected versions
XenServers and applications · cpe:o:xen:xen
  • Version 4.6.0
  • Version 4.5.1
  • Version 4.5.0
  • Version 4.4.1
All 30 release lines
  • Version 3.4.0
  • Version 3.4.1
  • Version 3.4.2
  • Version 3.4.3
  • Version 3.4.4
  • Version 4.0.0
  • Version 4.0.1
  • Version 4.0.2
  • Version 4.0.3
  • Version 4.0.4
  • Version 4.1.0
  • Version 4.1.1
  • Version 4.1.2
  • Version 4.1.3
  • Version 4.1.4
  • Version 4.1.5
  • Version 4.1.6.1
  • Version 4.2.0
  • Version 4.2.1
  • Version 4.2.2
  • Version 4.2.3
  • Version 4.3.0
  • Version 4.3.1
  • Version 4.3.2
  • Version 4.3.4
  • Version 4.4.0
  • Version 4.4.1
  • Version 4.5.0
  • Version 4.5.1
  • Version 4.6.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2015-7835
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2015-7835