CVE-2016-4480 — Vulnetix

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CVE-2016-4480 PUBLISHED

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.

EPSS 0.39% · 60.0th percentile

Risk Scores

EPSS Score

0.39%

60.0th percentile

Affected Products

Vendor	Product	Versions
Ubuntu:14.04:LTS	xen	0, 4.3.0-1ubuntu1, 4.3.0-1ubuntu2
Ubuntu:16.04:LTS	xen	0, 4.5.1-0ubuntu1, 4.5.1-0ubuntu2

Timeline

May 18, 2016 CVE Published
Feb 4, 2022 EPSS Score
Mar 28, 2022 EPSS Score
May 19, 2022 EPSS Score
Jul 10, 2022 EPSS Score
Sep 1, 2022 EPSS Score
Oct 23, 2022 EPSS Score
Dec 14, 2022 EPSS Score
Feb 4, 2023 EPSS Score
Mar 28, 2023 EPSS Score
May 19, 2023 EPSS Score
Jul 10, 2023 EPSS Score

References

https://ubuntu.com/security/CVE-2016-4480 third-party-advisory
http://xenbits.xen.org/xsa/advisory-176.html third-party-advisory
https://www.cve.org/CVERecord?id=CVE-2016-4480 third-party-advisory

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