CVE-2020-29568
An issue was discovered in Xen through 4.14.x. Some OSes (such as Linux, FreeBSD, and NetBSD) are processing watch events using a single thread. If the events are received faster than the thread is
02 Description
An issue was discovered in Xen through 4.14.x. Some OSes (such as Linux, FreeBSD, and NetBSD) are processing watch events using a single thread. If the events are received faster than the thread is
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
- 0.36% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 29.9% of scored records. A rank, not a probability.
- NVD base score
- 6.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
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
- 2020-12-15 16:52Z5 YR AGO
- Last updated
- 2024-08-04 16:55Z2 YR AGO
- Reserved
- 2020-12-04
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-770Allocation of Resources Without Limits or ThrottlingBase
- Data version
- 5.1
- Document digest
- 0360e38804a721206fd3ec6ab7f919841de98a84c8d2581b383610c272df2098
05 Affected products
06 References
- xenbits.xenproject.orghttps://xenbits.xenproject.org/xsa/advisory-349.html
- www.debian.orgDSA-4843https://www.debian.org/security/2021/dsa-4843
- lists.debian.org[debian-lts-announce] 20210212 [SECURITY] [DLA 2557-1] linux-4.19 security updatehttps://lists.debian.org/debian-lts-announce/2021/02/msg00018.html
- lists.debian.org[debian-lts-announce] 20210309 [SECURITY] [DLA 2586-1] linux security updatehttps://lists.debian.org/debian-lts-announce/2021/03/msg00010.html
- security.gentoo.orgGLSA-202107-30https://security.gentoo.org/glsa/202107-30
07 Fixed in
Debian 12
- linux Fixed in 5.9.15-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- linux Fixed in 5.9.15-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- linux Fixed in 5.9.15-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- linux Fixed in 4.4.0-203.235
- linux-aws Fixed in 4.4.0-1122.136
- linux-aws-hwe Fixed in 4.15.0-1094.101~16.04.1
- linux-azure Fixed in 4.15.0-1108.120~16.04.1
- linux-gcp Fixed in 4.15.0-1093.106~16.04.1
- linux-hwe Fixed in 4.15.0-136.140~16.04.1
- linux-hwe-edge No fix yet
- linux-kvm Fixed in 4.4.0-1088.97
- linux-oracle Fixed in 4.15.0-1065.73~16.04.1
- linux-raspi2 Fixed in 4.4.0-1146.156
- linux-snapdragon Fixed in 4.4.0-1150.160
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 4.15.0-136.140
- linux-aws Fixed in 4.15.0-1094.101
- linux-aws-5.0 No fix yet
- linux-aws-5.3 No fix yet
- linux-aws-5.4 Fixed in 5.4.0-1038.40~18.04.1
- linux-azure No fix yet
- linux-azure-4.15 Fixed in 4.15.0-1108.120
- linux-azure-5.3 No fix yet
- linux-azure-5.4 Fixed in 5.4.0-1040.42~18.04.1
- linux-azure-edge No fix yet
- linux-dell300x Fixed in 4.15.0-1012.16
- linux-gcp No fix yet
- linux-gcp-4.15 Fixed in 4.15.0-1093.106
- linux-gcp-5.3 No fix yet
- linux-gcp-5.4 Fixed in 5.4.0-1037.40~18.04.1
- linux-gcp-edge No fix yet
- linux-gke-4.15 Fixed in 4.15.0-1079.84
- linux-gke-5.4 Fixed in 5.4.0-1036.38~18.04.1
- linux-gkeop-5.4 Fixed in 5.4.0-1010.11~18.04.1
- linux-hwe No fix yet
- linux-hwe-5.4 Fixed in 5.4.0-66.74~18.04.2
- linux-hwe-edge No fix yet
- linux-kvm Fixed in 4.15.0-1085.87
- linux-oem No fix yet
- linux-oracle Fixed in 4.15.0-1065.73
- linux-oracle-5.0 No fix yet
- linux-oracle-5.3 No fix yet
- linux-oracle-5.4 Fixed in 5.4.0-1038.41~18.04.1
- linux-raspi-5.4 Fixed in 5.4.0-1029.32~18.04.1
- linux-raspi2 Fixed in 4.15.0-1079.84
- linux-snapdragon Fixed in 4.15.0-1096.105
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- linux Fixed in 5.4.0-66.74
- linux-aws Fixed in 5.4.0-1038.40
- linux-azure Fixed in 5.4.0-1040.42
- linux-gcp Fixed in 5.4.0-1037.40
- linux-gke Fixed in 5.4.0-1036.38
- linux-gkeop Fixed in 5.4.0-1010.11
- linux-hwe-5.8 Fixed in 5.8.0-44.50~20.04.1
- linux-kvm Fixed in 5.4.0-1033.34
- linux-oem-5.10 Fixed in 5.10.0-1011.12
- linux-oem-5.6 No fix yet
- linux-oracle Fixed in 5.4.0-1038.41
- linux-raspi Fixed in 5.4.0-1029.32
- linux-raspi2 No fix yet
- linux-riscv No fix yet
- linux-riscv-5.8 Fixed in 5.8.0-17.19~20.04.1
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
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 4.4.0-1086.90Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-azure Fixed in 4.15.0-1108.120~14.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-lts-xenial Fixed in 4.4.0-203.235~14.04.1Available 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 20.04 LTS
- linux-azure-fde-5.15 Fixed in 5.15.0-1114.123~20.04.1Available 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 4.4.0-1056.62Available 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 4.15.0-2037.39Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-azure-fips Fixed in 4.15.0-2020.23Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-fips Fixed in 4.15.0-1053.61Available 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 20.04 LTS
- linux-aws-fips Fixed in 5.4.0-1069.73+fips2Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-azure-fips Fixed in 5.4.0-1073.76+fips1Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-gcp-fips Fixed in 5.4.0-1067.71~20.04.1Available 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-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.
Ubuntu Pro FIPS 20.04 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.