Description
An issue was discovered in the Linux kernel through 5.6.11. btree_gc_coalesce in drivers/md/bcache/btree.c has a deadlock if a coalescing operation fails.
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 | 5.7.6-1 | — |
| Debian 13 | linux | 5.7.6-1 | — |
| Debian 12 | linux | 5.7.6-1 | — |
| Debian 9 | linux | 4.9.240-1 | DLA-2420-1 |
| Debian 9 | linux-4.19 | 4.19.132-1~deb9u2 | DLA-2323-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux | 5.4.0-45.49 | USN-4483-1 |
| Ubuntu 20.04 LTS | linux-aws +2 | 5.4.0-1022.22 | USN-4483-1 |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1023.23 | USN-4483-1 |
| Ubuntu 20.04 LTS | linux-gke +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1021.21 | USN-4483-1 |
| Ubuntu 20.04 LTS | linux-oem-5.6 | 5.6.0-1031.32 | — |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1016.17 | USN-4483-1 |
| Ubuntu 20.04 LTS | linux-riscv | 5.4.0-31.35 | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-115.116 | USN-4485-1 |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1080.84 | USN-4485-1 |
| Ubuntu 18.04 LTS | linux-aws-5.3 +1 | 5.3.0-1033.35 | USN-4465-1 |
| Ubuntu 18.04 LTS | linux-aws-5.4 +2 | 5.4.0-1022.22~18.04.1 | USN-4483-1 |
| Ubuntu 18.04 LTS | linux-azure-4.15 | 4.15.0-1093.103 | USN-4485-1 |
| Ubuntu 18.04 LTS | linux-azure-5.3 | 5.3.0-1035.36 | USN-4465-1 |
| Ubuntu 18.04 LTS | linux-azure-5.4 | 5.4.0-1023.23~18.04.1 | USN-4483-1 |
| Ubuntu 18.04 LTS | linux-gcp +8 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp-4.15 | 4.15.0-1081.92 | USN-4485-1 |
| Ubuntu 18.04 LTS | linux-gke-4.15 | 4.15.0-1067.70 | USN-4485-1 |
| Ubuntu 18.04 LTS | linux-gke-5.0 | 5.0.0-1046.47 | USN-4462-1 |
| Ubuntu 18.04 LTS | linux-hwe | 5.3.0-65.59 | USN-4465-1 |
| Ubuntu 18.04 LTS | linux-hwe-5.4 | 5.4.0-45.49~18.04.2 | USN-4483-1 |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1072.73 | USN-4485-1 |
| Ubuntu 18.04 LTS | linux-oem | 4.15.0-1094.104 | USN-4485-1 |
| Ubuntu 18.04 LTS | linux-oem-osp1 | 5.0.0-1067.72 | USN-4462-1 |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1051.55 | USN-4485-1 |
| Ubuntu 18.04 LTS | linux-raspi-5.4 | 5.4.0-1016.17~18.04.1 | USN-4483-1 |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1068.72 | USN-4485-1 |
| Ubuntu 18.04 LTS | linux-raspi2-5.3 | 5.3.0-1032.34 | — |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1084.92 | USN-4485-1 |
| Ubuntu 16.04 LTS | linux | 4.4.0-187.217 | USN-4463-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1112.124 | USN-4463-1 |
| Ubuntu 16.04 LTS | linux-aws-hwe | 4.15.0-1080.84~16.04.1 | USN-4485-1 |
| Ubuntu 16.04 LTS | linux-azure | 4.15.0-1093.103~16.04.1 | USN-4485-1 |
| Ubuntu 16.04 LTS | linux-gcp | 4.15.0-1081.92~16.04.1 | USN-4485-1 |
| Ubuntu 16.04 LTS | linux-hwe | 4.15.0-115.116~16.04.1 | USN-4485-1 |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1078.85 | USN-4463-1 |
| Ubuntu 16.04 LTS | linux-oracle | 4.15.0-1051.55~16.04.1 | USN-4485-1 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1137.146 | USN-4463-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1141.149 | USN-4463-1 |
Show 7 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-aws-fips +2 | 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 | 4.15.0-2025.25 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2007.8 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips | 4.15.0-1039.44 | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1044.49 | — |
| Ubuntu Pro 14.04 LTS | linux-aws | 4.4.0-1076.80 | USN-4463-1 |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1093.103~14.04.1 | USN-4485-1 |
| Ubuntu Pro 14.04 LTS | linux-lts-xenial | 4.4.0-187.217~14.04.1 | USN-4463-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP2 | kernel-azure +2 | 5.3.18-18.5.1 | SUSE-SU-2020:2027-1 |
| SLES 15 SP2 | kernel-default-base | 5.3.18-24.9.1.9.2.6 | SUSE-SU-2020:2105-1 |
| SLES 15 SP2 | kernel-docs | 5.3.18-24.9.2 | SUSE-SU-2020:2105-1 |
| SLES 15 SP2 | kernel-syms +4 | 5.3.18-24.9.1 | SUSE-SU-2020:2105-1 |
| SLES 15 SP1 | kernel-azure +2 | 4.12.14-8.38.1 | SUSE-SU-2020:2103-1 |
| SLES 15 SP1 | kernel-docs +5 | 4.12.14-197.48.1 | SUSE-SU-2020:2107-1 |
| SLES 15 | kernel-docs +6 | 4.12.14-150.55.1 | SUSE-SU-2020:2106-1 |
| SLES 12 SP5 | kernel-azure +2 | 4.12.14-16.22.1 | SUSE-SU-2020:2119-1 |
| SLES 12 SP5 | kernel-docs +4 | 4.12.14-122.29.1 | SUSE-SU-2020:2122-1 |
| SLES 12 SP4 | kernel-syms +2 | 4.12.14-95.57.1 | SUSE-SU-2020:2121-1 |
Show 22 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | kernel-syms +2 | 4.4.180-94.127.1 | SUSE-SU-2020:2152-1 |
| SLES 12 SP3 | kgraft-patch-SLE12-SP3_Update_34 | 1-4.3.1 | SUSE-SU-2020:2152-1 |
| SLES 12 SP2 | kernel-syms +2 | 4.4.121-92.138.1 | SUSE-SU-2020:2134-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_36 | 1-3.3.1 | SUSE-SU-2020:2134-1 |
| SLES for SAP 15 | kernel-docs +5 | 4.12.14-150.55.1 | SUSE-SU-2020:2106-1 |
| SLES for SAP 12 SP5 | kernel-azure +2 | 4.12.14-16.22.1 | SUSE-SU-2020:2119-1 |
| SLES for SAP 12 SP5 | kernel-syms +2 | 4.12.14-122.29.1 | SUSE-SU-2020:2122-1 |
| SLES for SAP 12 SP4 | kernel-syms +2 | 4.12.14-95.57.1 | SUSE-SU-2020:2121-1 |
| SLES for SAP 12 SP3 | kernel-syms +2 | 4.4.180-94.127.1 | SUSE-SU-2020:2152-1 |
| SLES for SAP 12 SP3 | kgraft-patch-SLE12-SP3_Update_34 | 1-4.3.1 | SUSE-SU-2020:2152-1 |
| SLES for SAP 12 SP2 | kernel-syms +2 | 4.4.121-92.138.1 | SUSE-SU-2020:2134-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_36 | 1-3.3.1 | SUSE-SU-2020:2134-1 |
| SLE Real Time 12 SP5 | kernel-rt +3 | 4.12.14-10.13.1 | SUSE-SU-2020:2478-1 |
| SLE Live Patching 15 SP2 | kernel-default | 5.3.18-24.9.1 | SUSE-SU-2020:2105-1 |
| SLE Live Patching 15 SP2 | kernel-livepatch-SLE15-SP2_Update_1 | 1-5.3.6 | SUSE-SU-2020:2105-1 |
| SLE Live Patching 15 SP1 | kernel-default | 4.12.14-197.48.1 | SUSE-SU-2020:2107-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_13 | 1-3.3.1 | SUSE-SU-2020:2107-1 |
| SLE Live Patching 15 | kernel-default | 4.12.14-150.55.1 | SUSE-SU-2020:2106-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_19 | 1-1.3.1 | SUSE-SU-2020:2106-1 |
| SLE Live Patching 12 SP5 | kernel-default | 4.12.14-122.29.1 | SUSE-SU-2020:2122-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_7 | 1-8.3.1 | SUSE-SU-2020:2122-1 |
| SLE Live Patching 12 SP4 | kernel-default | 4.12.14-95.57.1 | SUSE-SU-2020:2121-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_15 | 1-6.3.1 | SUSE-SU-2020:2121-1 |
| SLE HPC 15 | kernel-docs +5 | 4.12.14-150.55.1 | SUSE-SU-2020:2106-1 |
| SUSE Real Time Module 15 SP1 | kernel-rt +3 | 4.12.14-14.28.1 | SUSE-SU-2020:2487-1 |
| SUSE OpenStack Cloud Crowbar 9 | kernel-syms +2 | 4.12.14-95.57.1 | SUSE-SU-2020:2121-1 |
| SUSE OpenStack Cloud Crowbar 8 | kernel-syms +2 | 4.4.180-94.127.1 | SUSE-SU-2020:2152-1 |
| SUSE OpenStack Cloud Crowbar 8 | kgraft-patch-SLE12-SP3_Update_34 | 1-4.3.1 | SUSE-SU-2020:2152-1 |
| SUSE OpenStack Cloud 9 | kernel-syms +2 | 4.12.14-95.57.1 | SUSE-SU-2020:2121-1 |
| SUSE OpenStack Cloud 8 | kernel-syms +2 | 4.4.180-94.127.1 | SUSE-SU-2020:2152-1 |
| SUSE OpenStack Cloud 8 | kgraft-patch-SLE12-SP3_Update_34 | 1-4.3.1 | SUSE-SU-2020:2152-1 |
| SUSE OpenStack Cloud 7 | kernel-syms +2 | 4.4.121-92.138.1 | SUSE-SU-2020:2134-1 |
| SUSE OpenStack Cloud 7 | kgraft-patch-SLE12-SP2_Update_36 | 1-3.3.1 | SUSE-SU-2020:2134-1 |
| SUSE HPE Helion OpenStack 8 | kernel-syms +2 | 4.4.180-94.127.1 | SUSE-SU-2020:2152-1 |
| SUSE HPE Helion OpenStack 8 | kgraft-patch-SLE12-SP3_Update_34 | 1-4.3.1 | SUSE-SU-2020:2152-1 |
| SUSE Enterprise Storage 5 | kernel-syms +2 | 4.4.180-94.127.1 | SUSE-SU-2020:2152-1 |
| SUSE Enterprise Storage 5 | kgraft-patch-SLE12-SP3_Update_34 | 1-4.3.1 | SUSE-SU-2020:2152-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.2 | kernel-default-base | 5.3.18-lp152.33.1.lp152.8.4.4 | openSUSE-SU-2020:1062-1 |
| openSUSE Leap 15.2 | kernel-docs +8 | 5.3.18-lp152.33.1 | openSUSE-SU-2020:1062-1 |
| openSUSE Leap 15.2 | kernel-rt +3 | 5.3.18-lp152.3.5.1 | openSUSE-SU-2021:0242-1 |
| openSUSE Leap 15.1 | kernel-docs +8 | 4.12.14-lp151.28.59.1 | openSUSE-SU-2020:1153-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | kernel-livepatch-4.14.186-146.268 | 1.0-0.amzn2 | ALAS2-2020-1465 |
| Amazon Linux 2 | perf +8 | 4.14.186-146.268.amzn2 | ALAS2-2020-1465 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | kernel-uek +5 | 4.1.12-124.56.1.el7uek | ELSA-2021-9473, ELSA-2020-5848, ELSA-2020-5845 |
| Oracle Linux 7 | perf +5 | 4.14.35-1902.306.2.el7uek | ELSA-2020-5848, ELSA-2020-5845 |
Advisories 27
- USN-4485-1 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
- USN-4463-1 linux, linux-aws, linux-kvm, linux-lts-xenial, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-4483-1 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-4465-1 linux-hwe, linux-aws-5.3, linux-azure-5.3, linux-gke-5.3 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-4462-1 linux-gke-5.0, linux-oem-osp1 vulnerability Ubuntu Security Notices (USN) · Jun 3, 2026
- DLA-2323-1 linux-4.19 - new package Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2420-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2020:2105-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1153-1 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-2020:2119-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2487-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2107-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2121-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2122-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1062-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2478-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2103-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2134-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2152-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2027-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2022-1614 Linux Kernel: Mehrere Schwachstellen BSI CERT-Bund (WID) · Dec 9, 2025
- SUSE-SU-2020:2106-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- ALAS2-2020-1465 Important: kernel security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Feb 17, 2023
- ELSA-2021-9473 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 8, 2021
- ELSA-2020-5848 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Sep 14, 2020
- ELSA-2020-5845 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Sep 11, 2020
References
- openSUSE-SU-2020:1062 vendor-advisory
- openSUSE-SU-2020:1153 vendor-advisory
- [debian-lts-announce] 20200812 [SECURITY] [DLA 2323-1] linux-4.19 new package mailing-list
- USN-4463-1 vendor-advisory
- USN-4465-1 vendor-advisory
- USN-4462-1 vendor-advisory
- USN-4483-1 vendor-advisory
- USN-4485-1 vendor-advisory
- [debian-lts-announce] 20201030 [SECURITY] [DLA 2420-1] linux security update mailing-list
- [debian-lts-announce] 20201031 [SECURITY] [DLA 2420-2] linux regression update mailing-list
- https://www.oracle.com/security-alerts/cpuApr2021.html
- https://security.netapp.com/advisory/ntap-20200608-0001/
- https://lkml.org/lkml/2020/4/26/87