CVE-2020-2732
A flaw was discovered in the way that the KVM hypervisor handled instruction emulation for an L2 guest when nested virtualisation is enabled. Under some circumstances, an L2 guest may trick the L0
02 Description
A flaw was discovered in the way that the KVM hypervisor handled instruction emulation for an L2 guest when nested virtualisation is enabled. Under some circumstances, an L2 guest may trick the L0
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.92% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 60.1% of scored records. A rank, not a probability.
- NVD base score
- 6.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. 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
- 2020-04-08 21:10Z6 YR AGO
- Last updated
- 2024-09-30 15:47Z2 YR AGO
- Reserved
- 2019-12-10
- Assigning CNA
- oracle
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 5.8)
- CNA CVSS vector
- CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
- Weaknesses
- CWE-200Exposure of Sensitive Information to an Unauthorized ActorClass
- Data version
- 5.1
- Document digest
- d94ce231a865d6290033e051fa153a736b4bea2fcd43a5a0669eaaaace2f3d1f
05 Affected products
06 References
- www.openwall.comhttps://www.openwall.com/lists/oss-security/2020/02/25/3
- www.spinics.nethttps://www.spinics.net/lists/kvm/msg208259.html
- git.kernel.orghttps://git.kernel.org/linus/07721feee46b4b248402133228235318199b05ec
- git.kernel.orghttps://git.kernel.org/linus/35a571346a94fb93b5b3b6a599675ef3384bc75c
- git.kernel.orghttps://git.kernel.org/linus/e71237d3ff1abf9f3388337cfebf53b96df2020d
- bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1805135
- linux.oracle.comhttps://linux.oracle.com/errata/ELSA-2020-5540.html
- linux.oracle.comhttps://linux.oracle.com/errata/ELSA-2020-5542.html
- linux.oracle.comhttps://linux.oracle.com/errata/ELSA-2020-5543.html
- www.debian.orgDSA-4667https://www.debian.org/security/2020/dsa-4667
- lists.debian.org[debian-lts-announce] 20200609 [SECURITY] [DLA 2241-1] linux security updatehttps://lists.debian.org/debian-lts-announce/2020/06/msg00011.html
- lists.debian.org[debian-lts-announce] 20200610 [SECURITY] [DLA 2242-1] linux-4.9 security updatehttps://lists.debian.org/debian-lts-announce/2020/06/msg00012.html
- lists.debian.org[debian-lts-announce] 20200610 [SECURITY] [DLA 2241-2] linux security updatehttps://lists.debian.org/debian-lts-announce/2020/06/msg00013.html
- www.debian.orgDSA-4698https://www.debian.org/security/2020/dsa-4698
07 Fixed in
Arch Linux
- linux Fixed in 5.5.7.arch1-1
Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.
Debian 12
- linux Fixed in 5.5.13-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- linux Fixed in 5.5.13-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- linux Fixed in 5.5.13-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- linux Fixed in 4.4.0-176.206
- linux-aws Fixed in 4.4.0-1104.115
- linux-aws-hwe Fixed in 4.15.0-1063.67~16.04.1
- linux-azure Fixed in 4.15.0-1075.80
- linux-gcp Fixed in 4.15.0-1058.62
- linux-hwe Fixed in 4.15.0-91.92~16.04.1
- linux-hwe-edge No fix yet
- linux-kvm Fixed in 4.4.0-1068.75
- linux-oracle Fixed in 4.15.0-1035.38~16.04.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- linux Fixed in 4.15.0-91.92
- linux-aws Fixed in 4.15.0-1063.67
- linux-aws-5.0 Fixed in 5.0.0-1027.30
- linux-azure Fixed in 5.0.0-1035.37
- linux-azure-5.3 Fixed in 5.3.0-1016.17~18.04.1
- linux-azure-edge No fix yet
- linux-gcp Fixed in 5.0.0-1033.34
- linux-gcp-5.3 Fixed in 5.3.0-1014.15~18.04.1
- linux-gcp-edge No fix yet
- linux-gke-4.15 Fixed in 4.15.0-1055.58
- linux-gke-5.0 Fixed in 5.0.0-1032.33
- linux-gke-5.3 Fixed in 5.3.0-1014.15~18.04.1
- linux-hwe Fixed in 5.3.0-42.34~18.04.1
- linux-hwe-edge No fix yet
- linux-kvm Fixed in 4.15.0-1056.57
- linux-oem Fixed in 4.15.0-1076.86
- linux-oem-osp1 Fixed in 5.0.0-1043.48
- linux-oracle Fixed in 4.15.0-1035.39
- linux-oracle-5.0 Fixed in 5.0.0-1013.18
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- linux-azure-fde No fix yet
- linux-gke No fix yet
- linux-raspi2 No fix yet
- linux-riscv No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- linux-intel-iot-realtime No fix yet
- linux-realtime No fix yet
- linux-riscv No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- linux-raspi-realtime No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 14.04 LTS
- linux No fix yet
- linux-aws Fixed in 4.4.0-1064.68Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-azure Fixed in 4.15.0-1074.79~14.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-lts-xenial Fixed in 4.4.0-176.206~14.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro FIPS-updates 16.04 LTS
- linux-fips Fixed in 4.4.0-1031.36Available with Ubuntu Pro: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro FIPS-updates 18.04 LTS
- linux-aws-fips Fixed in 4.15.0-2018.18Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-azure-fips Fixed in 4.15.0-2006.7Available with Ubuntu Pro: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro FIPS 16.04 LTS
- linux-fips No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro FIPS 18.04 LTS
- linux-aws-fips No fix yet
- linux-azure-fips No fix yet
- linux-gcp-fips No fix yet
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.