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
02 Description
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
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 0.42% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 36.6% of scored records. A rank, not a probability.
- NVD base score
- The NVD has published no score for this record
- NVD CVSS vector
- No NVD score to derive
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Important. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2015-10-30 15:00Z11 YR AGO
- Last updated
- 2024-08-06 07:58Z2 YR AGO
- Reserved
- 2015-10-14
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- Data version
- 5.1
- Document digest
- 96cecc926e4209ec1280cc061c21305fcb3d93b9fa06c1b8aba91f543cc13c42
05 Affected products
06 References
- support.citrix.comhttp://support.citrix.com/article/CTX202404
- www.securityfocus.com77366http://www.securityfocus.com/bid/77366
- lists.fedoraproject.orgFEDORA-2015-242be2c240http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171249.html
- lists.fedoraproject.orgFEDORA-2015-a931b02be2http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171082.html
- xenbits.xen.orghttp://xenbits.xen.org/xsa/advisory-148.html
- lists.opensuse.orgopenSUSE-SU-2015:2250http://lists.opensuse.org/opensuse-updates/2015-12/msg00053.html
- github.comhttps://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-022-2015.txt
- www.debian.orgDSA-3390http://www.debian.org/security/2015/dsa-3390
- www.securitytracker.com1034032http://www.securitytracker.com/id/1034032
- lists.opensuse.orgopenSUSE-SU-2015:1965http://lists.opensuse.org/opensuse-updates/2015-11/msg00063.html
- lists.fedoraproject.orgFEDORA-2015-6f6b79efe2http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171185.html
- security.gentoo.orgGLSA-201604-03https://security.gentoo.org/glsa/201604-03
07 Fixed in
Debian 12
- xen Fixed in 4.6.0-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- xen Fixed in 4.6.0-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- xen Fixed in 4.6.0-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 14.04 LTS
- xen Fixed in 4.4.2-0ubuntu0.14.04.3
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.