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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 5.9.1-1 | — |
| Debian 13 | linux | 5.9.1-1 | — |
| Debian 12 | linux | 5.9.1-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-realtime +1 | No fix yet | — |
| Ubuntu 20.04 LTS | linux | 5.4.0-56.62 | USN-4658-1 |
| Ubuntu 20.04 LTS | linux-aws | 5.4.0-1030.31 | USN-4658-1 |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1032.33 | USN-4658-1 |
| Ubuntu 20.04 LTS | linux-gcp +1 | 5.4.0-1030.32 | USN-4658-1 |
| Ubuntu 20.04 LTS | linux-hwe-5.8 | 5.8.0-31.33~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1028.29 | USN-4658-1 |
| Ubuntu 20.04 LTS | linux-oem-5.6 | 5.6.0-1048.52 | USN-4752-1 |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1023.26 | USN-4658-1 |
| Ubuntu 20.04 LTS | linux-raspi2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-riscv | 5.4.0-37.42 | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-126.129 | USN-4660-1 |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1088.93 | USN-4660-1 |
| Ubuntu 18.04 LTS | linux-aws-5.4 | 5.4.0-1030.31~18.04.1 | USN-4658-1 |
| Ubuntu 18.04 LTS | linux-azure-4.15 | 4.15.0-1100.111 | USN-4660-1 |
| Ubuntu 18.04 LTS | linux-azure-5.4 | 5.4.0-1032.33~18.04.1 | USN-4658-1 |
| Ubuntu 18.04 LTS | linux-dell300x | 4.15.0-1007.11 | — |
| Ubuntu 18.04 LTS | linux-gcp +11 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp-4.15 | 4.15.0-1088.101 | USN-4660-1 |
| Ubuntu 18.04 LTS | linux-gcp-5.4 +2 | 5.4.0-1030.32~18.04.1 | USN-4658-1 |
| Ubuntu 18.04 LTS | linux-gkeop-5.4 | 5.4.0-1005.6 | — |
| Ubuntu 18.04 LTS | linux-hwe-5.4 | 5.4.0-56.62~18.04.1 | USN-4658-1 |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1079.81 | USN-4660-1 |
| Ubuntu 18.04 LTS | linux-oem | 4.15.0-1103.114 | USN-4660-1 |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1059.65 | USN-4660-1 |
| Ubuntu 18.04 LTS | linux-raspi-5.4 | 5.4.0-1023.26~18.04.1 | USN-4658-1 |
| Ubuntu 18.04 LTS | linux-raspi2 +1 | 4.15.0-1074.79 | USN-4660-1 |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1091.100 | USN-4660-1 |
| Ubuntu 16.04 LTS | linux | 4.4.0-197.229 | USN-4657-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1118.132 | USN-4657-1 |
| Ubuntu 16.04 LTS | linux-aws-hwe | 4.15.0-1088.93~16.04.1 | USN-4660-1 |
| Ubuntu 16.04 LTS | linux-azure | 4.15.0-1100.111~16.04.1 | USN-4660-1 |
| Ubuntu 16.04 LTS | linux-gcp | 4.15.0-1088.101~16.04.1 | USN-4660-1 |
| Ubuntu 16.04 LTS | linux-hwe | 4.15.0-126.129~16.04.1 | USN-4660-1 |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1084.93 | USN-4657-1 |
| Ubuntu 16.04 LTS | linux-oracle | 4.15.0-1059.65~16.04.1 | USN-4660-1 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1142.152 | USN-4657-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1146.156 | USN-4657-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS 20.04 LTS | linux-aws-fips +2 | No fix yet | — |
| Ubuntu Pro FIPS 18.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS 16.04 LTS | linux-fips | No fix yet | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-aws-fips | 5.4.0-1069.73+fips2 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-azure-fips | 5.4.0-1073.76+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-gcp-fips | 5.4.0-1067.71~20.04.1 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-aws-fips | 4.15.0-2031.32 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2013.15 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips | 4.15.0-1046.53 | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1051.57 | — |
| Ubuntu Pro 20.04 LTS | linux-azure-fde-5.15 | 5.15.0-1114.123~20.04.1 | — |
| Ubuntu Pro 14.04 LTS | linux | No fix yet | — |
| Ubuntu Pro 14.04 LTS | linux-aws | 4.4.0-1082.86 | USN-4657-1 |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1100.111~14.04.1 | USN-4660-1 |
| Ubuntu Pro 14.04 LTS | linux-lts-xenial | 4.4.0-197.229~14.04.1 | USN-4657-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | kernel-rt +12 | 4.18.0-372.13.1.rt7.170.el8_6 | RHSA-2022:5344 |
| RHEL 8 | perf +26 | 4.18.0-372.13.1.el8_6 | RHSA-2022:5316 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhev Hypervisor 4 | perf +2 | 4.18.0-372.13.1.el8_6 | RHSA-2022:5316 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | kernel-rt +11 | 4.18.0-372.13.1.rt7.170.el8_6 | ALSA-2022:5344 |
| AlmaLinux 8 | perf +18 | 4.18.0-372.13.1.el8_6 | ALSA-2022:5316 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | kernel | 4.18.0-372.13.1.el8_6 | RLSA-2022:5316 |
| Rocky Linux 8 | kernel-rt | 4.18.0-372.13.1.rt7.170.el8_6 | RLSA-2022:5344 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP2 | kernel-azure +2 | 5.3.18-18.29.1 | SUSE-SU-2020:3713-1 |
| SLES 15 SP2 | kernel-default-base | 5.3.18-24.43.2.9.17.3 | SUSE-SU-2020:3748-1 |
| SLES 15 SP2 | kernel-docs +5 | 5.3.18-24.43.2 | SUSE-SU-2020:3748-1 |
| SLES 15 SP1 | kernel-azure +2 | 4.12.14-8.55.1 | SUSE-SU-2020:3714-1 |
| SLES 15 SP1 | kernel-docs +5 | 4.12.14-197.75.1 | SUSE-SU-2020:3718-1 |
| SLES 15 | kernel-docs +6 | 4.12.14-150.66.1 | SUSE-SU-2021:0438-1 |
| SLES 12 SP5 | kernel-azure +2 | 4.12.14-16.38.1 | SUSE-SU-2020:3715-1 |
| SLES 12 SP5 | kernel-docs +4 | 4.12.14-122.54.1 | SUSE-SU-2020:3717-1 |
| SLES 12 SP4 | kernel-syms +2 | 4.12.14-95.68.1 | SUSE-SU-2021:0434-1 |
Show 24 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | kernel-syms +2 | 4.4.180-94.138.1 | SUSE-SU-2021:0452-1 |
| SLES 12 SP3 | kgraft-patch-SLE12-SP3_Update_37 | 1-4.3.1 | SUSE-SU-2021:0452-1 |
| SLES 12 SP2 | kernel-syms +2 | 4.4.121-92.149.1 | SUSE-SU-2021:0437-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_39 | 1-3.3.1 | SUSE-SU-2021:0437-1 |
| SLES 11 SP4 | kernel-ec2 +8 | 3.0.101-108.120.1 | SUSE-SU-2021:14630-1 |
| SLES for SAP 15 | kernel-docs +5 | 4.12.14-150.66.1 | SUSE-SU-2021:0438-1 |
| SLES for SAP 12 SP5 | kernel-azure +2 | 4.12.14-16.38.1 | SUSE-SU-2020:3715-1 |
| SLES for SAP 12 SP5 | kernel-syms +2 | 4.12.14-122.54.1 | SUSE-SU-2020:3717-1 |
| SLES for SAP 12 SP4 | kernel-syms +2 | 4.12.14-95.68.1 | SUSE-SU-2021:0434-1 |
| SLES for SAP 12 SP3 | kernel-syms +2 | 4.4.180-94.138.1 | SUSE-SU-2021:0452-1 |
| SLES for SAP 12 SP3 | kgraft-patch-SLE12-SP3_Update_37 | 1-4.3.1 | SUSE-SU-2021:0452-1 |
| SLES for SAP 12 SP2 | kernel-syms +2 | 4.4.121-92.149.1 | SUSE-SU-2021:0437-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_39 | 1-3.3.1 | SUSE-SU-2021:0437-1 |
| SLE Real Time 12 SP5 | kernel-rt +3 | 4.12.14-10.25.1 | SUSE-SU-2020:3766-1 |
| SLE Live Patching 15 SP2 | kernel-default | 5.3.18-24.43.2 | SUSE-SU-2020:3748-1 |
| SLE Live Patching 15 SP2 | kernel-livepatch-SLE15-SP2_Update_8 | 1-5.3.3 | SUSE-SU-2020:3748-1 |
| SLE Live Patching 15 SP1 | kernel-default | 4.12.14-197.75.1 | SUSE-SU-2020:3718-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_20 | 1-3.3.1 | SUSE-SU-2020:3718-1 |
| SLE Live Patching 15 | kernel-default | 4.12.14-150.66.1 | SUSE-SU-2021:0438-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_22 | 1-1.3.1 | SUSE-SU-2021:0438-1 |
| SLE Live Patching 12 SP5 | kernel-default | 4.12.14-122.54.1 | SUSE-SU-2020:3717-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_13 | 1-8.3.1 | SUSE-SU-2020:3717-1 |
| SLE Live Patching 12 SP4 | kernel-default | 4.12.14-95.68.1 | SUSE-SU-2021:0434-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_18 | 1-6.3.1 | SUSE-SU-2021:0434-1 |
| SLE HPC 15 | kernel-docs +5 | 4.12.14-150.66.1 | SUSE-SU-2021:0438-1 |
| SUSE Real Time Module 15 SP2 | kernel-rt +3 | 5.3.18-19.1 | SUSE-SU-2020:3764-1 |
| SUSE Real Time Module 15 SP1 | kernel-rt +3 | 4.12.14-14.44.2 | SUSE-SU-2020:3798-1 |
| SUSE OpenStack Cloud Crowbar 9 | kernel-syms +2 | 4.12.14-95.68.1 | SUSE-SU-2021:0434-1 |
| SUSE OpenStack Cloud Crowbar 8 | kernel-syms +2 | 4.4.180-94.138.1 | SUSE-SU-2021:0452-1 |
| SUSE OpenStack Cloud Crowbar 8 | kgraft-patch-SLE12-SP3_Update_37 | 1-4.3.1 | SUSE-SU-2021:0452-1 |
| SUSE OpenStack Cloud 9 | kernel-syms +2 | 4.12.14-95.68.1 | SUSE-SU-2021:0434-1 |
| SUSE OpenStack Cloud 8 | kernel-syms +2 | 4.4.180-94.138.1 | SUSE-SU-2021:0452-1 |
| SUSE OpenStack Cloud 8 | kgraft-patch-SLE12-SP3_Update_37 | 1-4.3.1 | SUSE-SU-2021:0452-1 |
| SUSE OpenStack Cloud 7 | kernel-syms +2 | 4.4.121-92.149.1 | SUSE-SU-2021:0437-1 |
| SUSE OpenStack Cloud 7 | kgraft-patch-SLE12-SP2_Update_39 | 1-3.3.1 | SUSE-SU-2021:0437-1 |
| SUSE HPE Helion OpenStack 8 | kernel-syms +2 | 4.4.180-94.138.1 | SUSE-SU-2021:0452-1 |
| SUSE HPE Helion OpenStack 8 | kgraft-patch-SLE12-SP3_Update_37 | 1-4.3.1 | SUSE-SU-2021:0452-1 |
| SUSE Enterprise Storage 5 | kernel-syms +2 | 4.4.180-94.138.1 | SUSE-SU-2021:0452-1 |
| SUSE Enterprise Storage 5 | kgraft-patch-SLE12-SP3_Update_37 | 1-4.3.1 | SUSE-SU-2021:0452-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.2 | kernel-default-base | 5.3.18-lp152.54.1.lp152.8.12.1 | openSUSE-SU-2020:2260-1, openSUSE-SU-2020:2161-1 |
| openSUSE Leap 15.2 | kernel-docs | 5.3.18-lp152.54.2 | openSUSE-SU-2020:2161-1 |
| openSUSE Leap 15.2 | kernel-rt +3 | 5.3.18-lp152.3.5.1 | openSUSE-SU-2021:0242-1 |
| openSUSE Leap 15.2 | kernel-syms +7 | 5.3.18-lp152.54.1 | openSUSE-SU-2020:2161-1 |
| openSUSE Leap 15.1 | kernel-docs +8 | 4.12.14-lp151.28.83.1 | openSUSE-SU-2020:2034-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | perf +19 | 4.18.0-372.13.1.0.1.el8_6 | ELSA-2022-5316 |
| Oracle Linux 7 | dtrace-modules-3.8.13-118.53.1.el6uek | 0.4.5-3.el6 | ELSA-2021-9001 |
| Oracle Linux 7 | dtrace-modules-3.8.13-118.53.1.el7uek | 0.4.5-3.el7 | ELSA-2021-9001 |
| Oracle Linux 7 | kernel-uek +5 | 3.8.13-118.53.1.el7uek | ELSA-2021-9002, ELSA-2021-9001, ELSA-2020-5996 |
| Oracle Linux 7 | perf +3 | 5.4.17-2036.101.2.el7uek | ELSA-2020-5996 |
Advisories 33
- ALSA-2022:5316 Important: kernel security and bug fix update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2022:5344 Important: kernel-rt security and bug fix update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2022:5344 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2022:5316 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-4752-1 linux-oem-5.6 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-4657-1 linux, linux-aws, linux-azure, linux-kvm, linux-lts-trusty, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-4658-1 linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-hwe-5.4, linux-kvm, linux-oracle, linux-oracle-5.4, linux-raspi, linux-raspi-5.4 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-4660-1 linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp, linux-gcp-4.15, linux-gke-4.15, linux-hwe, linux-kvm, linux-oem, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- RLSA-2022:5316 Important: kernel security and bug fix update Rocky Linux Security Advisories · Feb 4, 2026
- RLSA-2022:5344 Important: kernel-rt security and bug fix update Rocky Linux Security Advisories · Feb 4, 2026
- openSUSE-SU-2020:2260-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3764-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:0242-1 Security update for RT kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3717-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:0434-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3714-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3718-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:2161-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3798-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:2034-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:0437-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:14630-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3766-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3713-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3748-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3715-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:0438-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:0452-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2022-0493 Linux Kernel: Schwachstelle ermöglicht Offenlegung von Informationen BSI CERT-Bund (WID) · Dec 20, 2022
- ELSA-2022-5316 Important: kernel security and bug fix update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jul 2, 2022
- ELSA-2021-9001 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jan 7, 2021
- ELSA-2021-9002 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jan 7, 2021
- ELSA-2020-5996 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Dec 15, 2020
References
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.15
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6735b4632def0640dbdf4eb9f99816aca18c4f16
- https://syzkaller.appspot.com/bug?id=08b8be45afea11888776f897895aef9ad1c3ecfd
- https://bugzilla.suse.com/show_bug.cgi?id=1178886
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5af08640795b2b9a940c9266c0260455377ae262