CVE-2020-28915
A buffer over-read (at the framebuffer layer) in the fbcon code in the Linux kernel before 5.8.15 could be used by local attackers to read kernel memory, aka CID-6735b4632def.
02 Description
A buffer over-read (at the framebuffer layer) in the fbcon code in the Linux kernel before 5.8.15 could be used by local attackers to read kernel memory, aka CID-6735b4632def.
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
- 0.37% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 31.5% of scored records. A rank, not a probability.
- NVD base score
- 5.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:P/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H
- 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
- 2020-11-18 07:59Z5 YR AGO
- Last updated
- 2024-08-04 16:40Z2 YR AGO
- Reserved
- 2020-11-18
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-125Out-of-bounds ReadBase
- Data version
- 5.1
- Document digest
- 9b555c2130e96cd0a73beb5ed3995ebcd68b68290efb032ff4735a111eeaee91
05 Affected products
06 References
- cdn.kernel.orghttps://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.15
- git.kernel.orghttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6735b4632def0640dbdf4eb9f99816aca18c4f16
- syzkaller.appspot.comhttps://syzkaller.appspot.com/bug?id=08b8be45afea11888776f897895aef9ad1c3ecfd
- bugzilla.suse.comhttps://bugzilla.suse.com/show_bug.cgi?id=1178886
- git.kernel.orghttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5af08640795b2b9a940c9266c0260455377ae262
07 Fixed in
AlmaLinux 8
- bpftool Fixed in 4.18.0-372.13.1.el8_6
- kernel Fixed in 4.18.0-372.13.1.el8_6
- kernel-abi-stablelists Fixed in 4.18.0-372.13.1.el8_6
- kernel-core Fixed in 4.18.0-372.13.1.el8_6
- kernel-cross-headers Fixed in 4.18.0-372.13.1.el8_6
- kernel-debug Fixed in 4.18.0-372.13.1.el8_6
- kernel-debug-core Fixed in 4.18.0-372.13.1.el8_6
- kernel-debug-devel Fixed in 4.18.0-372.13.1.el8_6
- kernel-debug-modules Fixed in 4.18.0-372.13.1.el8_6
- kernel-debug-modules-extra Fixed in 4.18.0-372.13.1.el8_6
- kernel-devel Fixed in 4.18.0-372.13.1.el8_6
- kernel-doc Fixed in 4.18.0-372.13.1.el8_6
- kernel-modules Fixed in 4.18.0-372.13.1.el8_6
- kernel-modules-extra Fixed in 4.18.0-372.13.1.el8_6
- kernel-rt Fixed in 4.18.0-372.13.1.rt7.170.el8_6
- kernel-rt-core Fixed in 4.18.0-372.13.1.rt7.170.el8_6
- kernel-rt-debug Fixed in 4.18.0-372.13.1.rt7.170.el8_6
- kernel-rt-debug-core Fixed in 4.18.0-372.13.1.rt7.170.el8_6
- kernel-rt-debug-devel Fixed in 4.18.0-372.13.1.rt7.170.el8_6
- kernel-rt-debug-kvm Fixed in 4.18.0-372.13.1.rt7.170.el8_6
- kernel-rt-debug-modules Fixed in 4.18.0-372.13.1.rt7.170.el8_6
- kernel-rt-debug-modules-extra Fixed in 4.18.0-372.13.1.rt7.170.el8_6
- kernel-rt-devel Fixed in 4.18.0-372.13.1.rt7.170.el8_6
- kernel-rt-kvm Fixed in 4.18.0-372.13.1.rt7.170.el8_6
- kernel-rt-modules Fixed in 4.18.0-372.13.1.rt7.170.el8_6
- kernel-rt-modules-extra Fixed in 4.18.0-372.13.1.rt7.170.el8_6
- kernel-tools Fixed in 4.18.0-372.13.1.el8_6
- kernel-tools-libs Fixed in 4.18.0-372.13.1.el8_6
- kernel-tools-libs-devel Fixed in 4.18.0-372.13.1.el8_6
- perf Fixed in 4.18.0-372.13.1.el8_6
- python3-perf Fixed in 4.18.0-372.13.1.el8_6
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- bpftool Fixed in 4.18.0-372.13.1.el8_6
- kernel Fixed in 4.18.0-372.13.1.el8_6
- kernel-abi-stablelists Fixed in 4.18.0-372.13.1.el8_6
- kernel-core Fixed in 4.18.0-372.13.1.el8_6
- kernel-cross-headers Fixed in 4.18.0-372.13.1.el8_6
- kernel-debug Fixed in 4.18.0-372.13.1.el8_6
- kernel-debug-core Fixed in 4.18.0-372.13.1.el8_6
- kernel-debug-devel Fixed in 4.18.0-372.13.1.el8_6
- kernel-debug-modules Fixed in 4.18.0-372.13.1.el8_6
- kernel-debug-modules-extra Fixed in 4.18.0-372.13.1.el8_6
- kernel-devel Fixed in 4.18.0-372.13.1.el8_6
- kernel-doc Fixed in 4.18.0-372.13.1.el8_6
- kernel-modules Fixed in 4.18.0-372.13.1.el8_6
- kernel-modules-extra Fixed in 4.18.0-372.13.1.el8_6
- kernel-rt Fixed in 4.18.0-372.13.1.rt7.170.el8_6
- kernel-rt-core Fixed in 4.18.0-372.13.1.rt7.170.el8_6
- kernel-rt-debug Fixed in 4.18.0-372.13.1.rt7.170.el8_6
- kernel-rt-debug-core Fixed in 4.18.0-372.13.1.rt7.170.el8_6
- kernel-rt-debug-devel Fixed in 4.18.0-372.13.1.rt7.170.el8_6
- kernel-rt-debug-kvm Fixed in 4.18.0-372.13.1.rt7.170.el8_6
- kernel-rt-debug-modules Fixed in 4.18.0-372.13.1.rt7.170.el8_6
- kernel-rt-debug-modules-extra Fixed in 4.18.0-372.13.1.rt7.170.el8_6
- kernel-rt-devel Fixed in 4.18.0-372.13.1.rt7.170.el8_6
- kernel-rt-kvm Fixed in 4.18.0-372.13.1.rt7.170.el8_6
- kernel-rt-modules Fixed in 4.18.0-372.13.1.rt7.170.el8_6
- kernel-rt-modules-extra Fixed in 4.18.0-372.13.1.rt7.170.el8_6
- kernel-tools Fixed in 4.18.0-372.13.1.el8_6
- kernel-tools-libs Fixed in 4.18.0-372.13.1.el8_6
- kernel-tools-libs-devel Fixed in 4.18.0-372.13.1.el8_6
- perf Fixed in 4.18.0-372.13.1.el8_6
- python3-perf Fixed in 4.18.0-372.13.1.el8_6
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- linux Fixed in 5.9.1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- linux Fixed in 5.9.1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- linux Fixed in 5.9.1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- linux Fixed in 4.4.0-197.229
- linux-aws Fixed in 4.4.0-1118.132
- linux-aws-hwe Fixed in 4.15.0-1088.93~16.04.1
- linux-azure Fixed in 4.15.0-1100.111~16.04.1
- linux-gcp Fixed in 4.15.0-1088.101~16.04.1
- linux-hwe Fixed in 4.15.0-126.129~16.04.1
- linux-hwe-edge No fix yet
- linux-kvm Fixed in 4.4.0-1084.93
- linux-oracle Fixed in 4.15.0-1059.65~16.04.1
- linux-raspi2 Fixed in 4.4.0-1142.152
- linux-snapdragon Fixed in 4.4.0-1146.156
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 4.15.0-126.129
- linux-aws Fixed in 4.15.0-1088.93
- linux-aws-5.0 No fix yet
- linux-aws-5.3 No fix yet
- linux-aws-5.4 Fixed in 5.4.0-1030.31~18.04.1
- linux-azure No fix yet
- linux-azure-4.15 Fixed in 4.15.0-1100.111
- linux-azure-5.3 No fix yet
- linux-azure-5.4 Fixed in 5.4.0-1032.33~18.04.1
- linux-azure-edge No fix yet
- linux-dell300x Fixed in 4.15.0-1007.11
- linux-gcp No fix yet
- linux-gcp-4.15 Fixed in 4.15.0-1088.101
- linux-gcp-5.3 No fix yet
- linux-gcp-5.4 Fixed in 5.4.0-1030.32~18.04.1
- linux-gcp-edge No fix yet
- linux-gke-4.15 Fixed in 4.15.0-1074.79
- linux-gke-5.4 Fixed in 5.4.0-1030.32~18.04.1
- linux-gkeop-5.4 Fixed in 5.4.0-1005.6
- linux-hwe No fix yet
- linux-hwe-5.4 Fixed in 5.4.0-56.62~18.04.1
- linux-hwe-edge No fix yet
- linux-kvm Fixed in 4.15.0-1079.81
- linux-oem Fixed in 4.15.0-1103.114
- linux-oracle Fixed in 4.15.0-1059.65
- linux-oracle-5.0 No fix yet
- linux-oracle-5.3 No fix yet
- linux-oracle-5.4 Fixed in 5.4.0-1030.32~18.04.1
- linux-raspi-5.4 Fixed in 5.4.0-1023.26~18.04.1
- linux-raspi2 Fixed in 4.15.0-1074.79
- linux-snapdragon Fixed in 4.15.0-1091.100
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 5.4.0-56.62
- linux-aws Fixed in 5.4.0-1030.31
- linux-azure Fixed in 5.4.0-1032.33
- linux-gcp Fixed in 5.4.0-1030.32
- linux-hwe-5.8 Fixed in 5.8.0-31.33~20.04.1
- linux-kvm Fixed in 5.4.0-1028.29
- linux-oem-5.6 Fixed in 5.6.0-1048.52
- linux-oracle Fixed in 5.4.0-1030.32
- linux-raspi Fixed in 5.4.0-1023.26
- linux-raspi2 No fix yet
- linux-riscv Fixed in 5.4.0-37.42
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 4.4.0-1082.86Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-azure Fixed in 4.15.0-1100.111~14.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-lts-xenial Fixed in 4.4.0-197.229~14.04.1Available 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 4.4.0-1051.57Available 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 4.15.0-2031.32Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-azure-fips Fixed in 4.15.0-2013.15Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-fips Fixed in 4.15.0-1046.53Available 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.