Description
An issue was discovered in the Linux kernel before 5.6.5. There is a use-after-free in block/bfq-iosched.c related to bfq_idle_slice_timer_body.
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 | 5.6.7-1 | — |
| Debian 13 | linux | 5.6.7-1 | — |
| Debian 12 | linux | 5.6.7-1 | — |
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 | 5.4.0-31.35 | USN-4367-1 |
| Ubuntu 20.04 LTS | linux-aws +4 | 5.4.0-1011.11 | USN-4367-1 |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1012.12 | USN-4367-1 |
| Ubuntu 20.04 LTS | linux-gke +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-oem-5.6 | 5.6.0-1010.10 | — |
| Ubuntu 20.04 LTS | linux-riscv | 5.4.0-26.30 | USN-4367-1 |
| Ubuntu 18.04 LTS | linux | 4.15.0-101.102 | USN-4363-1 |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1067.71 | USN-4363-1 |
| Ubuntu 18.04 LTS | linux-aws-5.3 | 5.3.0-1019.21~18.04.1 | USN-4369-1 |
| Ubuntu 18.04 LTS | linux-azure-4.15 | 4.15.0-1083.93 | USN-4363-1 |
| Ubuntu 18.04 LTS | linux-azure-5.3 | 5.3.0-1022.23~18.04.1 | USN-4369-1 |
| Ubuntu 18.04 LTS | linux-gcp +6 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp-5.3 +1 | 5.3.0-1020.22~18.04.1 | USN-4369-1 |
| Ubuntu 18.04 LTS | linux-gke-4.15 | 4.15.0-1059.62 | USN-4363-1 |
| Ubuntu 18.04 LTS | linux-gke-5.0 | 5.0.0-1037.38 | USN-4368-1 |
| Ubuntu 18.04 LTS | linux-hwe | 5.3.0-53.47~18.04.1 | USN-4369-1 |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1060.61 | USN-4363-1 |
| Ubuntu 18.04 LTS | linux-oem | 4.15.0-1081.91 | USN-4363-1 |
| Ubuntu 18.04 LTS | linux-oem-osp1 | 5.0.0-1052.57 | USN-4368-1 |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1039.43 | USN-4363-1 |
| Ubuntu 18.04 LTS | linux-oracle-5.3 | 5.3.0-1018.20~18.04.1 | USN-4369-1 |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1062.66 | USN-4363-1 |
| Ubuntu 18.04 LTS | linux-raspi2-5.3 | 5.3.0-1026.28~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1079.86 | USN-4363-1 |
| Ubuntu 16.04 LTS | linux-aws-hwe | 4.15.0-1067.71~16.04.1 | USN-4363-1 |
| Ubuntu 16.04 LTS | linux-azure | 4.15.0-1083.93~16.04.1 | USN-4363-1 |
| Ubuntu 16.04 LTS | linux-gcp | 4.15.0-1071.81~16.04.1 | USN-4363-1 |
| Ubuntu 16.04 LTS | linux-hwe | 4.15.0-101.102~16.04.1 | USN-4363-1 |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu 16.04 LTS | linux-oracle | 4.15.0-1039.43~16.04.1 | USN-4363-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS 18.04 LTS | linux-aws-fips +2 | No fix yet | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-aws-fips | 4.15.0-2018.18 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2006.7 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips | 4.15.0-1029.34 | — |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1083.93~14.04.1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | kernel-rt +12 | 4.18.0-193.6.3.rt13.59.el8_2 | RHSA-2020:2428 |
| RHEL 8 | kpatch-patch-4_18_0-193 | 1-3.el8 | RHSA-2020:2567 |
| RHEL 8 | kpatch-patch-4_18_0-193_1_2 | 1-1.el8_2 | RHSA-2020:2567 |
| RHEL 8 | perf +26 | 4.18.0-193.6.3.el8_2 | RHSA-2020:2427 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8.1 EUS | kpatch-patch-4_18_0-147 | 1-14.el8 | RHSA-2020:2669 |
| RHEL 8.1 EUS | kpatch-patch-4_18_0-147_0_2 +1 | 1-10.el8 | RHSA-2020:2669 |
| RHEL 8.1 EUS | kpatch-patch-4_18_0-147_13_2 | 1-1.el8_1 | RHSA-2020:2669 |
| RHEL 8.1 EUS | kpatch-patch-4_18_0-147_3_1 | 1-10.el8_1 | RHSA-2020:2669 |
| RHEL 8.1 EUS | kpatch-patch-4_18_0-147_5_1 | 1-5.el8_1 | RHSA-2020:2669 |
| RHEL 8.1 EUS | kpatch-patch-4_18_0-147_8_1 | 1-3.el8_1 | RHSA-2020:2669 |
| RHEL 8.1 EUS | perf +26 | 4.18.0-147.20.1.el8_1 | RHSA-2020:2667 |
| RHEL 8.0 E4S | perf +18 | 4.18.0-80.23.2.el8_0 | RHSA-2020:2429 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | kernel-azure +2 | 4.12.14-8.33.1 | SUSE-SU-2020:1604-1 |
| SLES 15 SP1 | kernel-docs +5 | 4.12.14-197.45.1 | SUSE-SU-2020:1599-1 |
| SLES 15 | kernel-docs +6 | 4.12.14-150.52.1 | SUSE-SU-2020:1663-1 |
| SLES 12 SP5 | kernel-azure +2 | 4.12.14-16.16.1 | SUSE-SU-2020:1587-1 |
| SLES 12 SP5 | kernel-docs +4 | 4.12.14-122.23.1 | SUSE-SU-2020:1602-1 |
| SLES 12 SP4 | kernel-azure +2 | 4.12.14-6.43.1 | SUSE-SU-2020:1603-1 |
| SLES 12 SP4 | kernel-docs +4 | 4.12.14-95.54.1 | SUSE-SU-2020:1605-1 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 | kernel-docs +5 | 4.12.14-150.52.1 | SUSE-SU-2020:1663-1 |
| SLES for SAP 12 SP5 | kernel-azure +2 | 4.12.14-16.16.1 | SUSE-SU-2020:1587-1 |
| SLES for SAP 12 SP5 | kernel-syms +2 | 4.12.14-122.23.1 | SUSE-SU-2020:1602-1 |
| SLES for SAP 12 SP4 | kernel-azure +2 | 4.12.14-6.43.1 | SUSE-SU-2020:1603-1 |
| SLES for SAP 12 SP4 | kernel-syms +2 | 4.12.14-95.54.1 | SUSE-SU-2020:1605-1 |
| SLE Real Time 12 SP5 | kernel-rt +3 | 4.12.14-10.13.1 | SUSE-SU-2020:2478-1 |
| SLE Real Time 12 SP4 | kernel-rt +3 | 4.12.14-8.23.1 | SUSE-SU-2020:2156-1 |
| SLE Live Patching 15 SP1 | kernel-default | 4.12.14-197.45.1 | SUSE-SU-2020:1599-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_12 | 1-3.5.1 | SUSE-SU-2020:1599-1 |
| SLE Live Patching 15 | kernel-default | 4.12.14-150.52.1 | SUSE-SU-2020:1663-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_18 | 1-1.5.1 | SUSE-SU-2020:1663-1 |
| SLE Live Patching 12 SP5 | kernel-default | 4.12.14-122.23.1 | SUSE-SU-2020:1602-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_5 | 1-8.3.1 | SUSE-SU-2020:1602-1 |
| SLE Live Patching 12 SP4 | kernel-default | 4.12.14-95.54.1 | SUSE-SU-2020:1605-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_14 | 1-6.3.1 | SUSE-SU-2020:1605-1 |
| SLE HPC 15 | kernel-docs +5 | 4.12.14-150.52.1 | SUSE-SU-2020:1663-1 |
| SUSE Real Time Module 15 SP1 | kernel-rt +3 | 4.12.14-14.28.1 | SUSE-SU-2020:2487-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.1 | kernel-docs | 4.12.14-lp151.28.52.2 | openSUSE-SU-2020:0801-1 |
| openSUSE Leap 15.1 | kernel-obs-qa +1 | 4.12.14-lp151.28.52.3 | openSUSE-SU-2020:0801-1 |
| openSUSE Leap 15.1 | kernel-syms +5 | 4.12.14-lp151.28.52.1 | openSUSE-SU-2020:0801-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | kernel-livepatch-4.14.177-139.253 | 1.0-0.amzn2 | ALAS2-2020-1440 |
| Amazon Linux 2 | perf +8 | 4.14.177-139.253.amzn2 | ALAS2-2020-1440 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | perf +19 | 4.18.0-193.6.3.el8_2 | ELSA-2020-2427 |
| Oracle Linux 7 | perf +10 | 4.14.35-1902.304.6.el7uek | ELSA-2020-5755, ELSA-2020-5714 |
Advisories 26
- RHSA-2020:2669 Red Hat Security Advisory: kpatch-patch security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2020:2667 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2020:2567 Red Hat Security Advisory: kpatch-patch security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2020:2429 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2020:2428 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2020:2427 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-4368-1 linux-gke-5.0, linux-oem-osp1 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-4369-1 linux, linux-aws, linux-aws-5.3, linux-azure, linux-azure-5.3, linux-gcp, linux-gcp-5.3, linux-gke-5.3, linux-hwe, linux-kvm, linux-oracle, linux-oracle-5.3, linux-raspi2 vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-4363-1 linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp, 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-4367-1 linux, linux-aws, linux-azure, linux-gcp, linux-kvm, linux-oracle, linux-raspi, linux-riscv vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- openSUSE-SU-2020:0801-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2156-1 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-2020:1603-1 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-2020:1663-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1587-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1604-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1602-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1599-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2022-1923 Linux Kernel: Mehrere Schwachstellen BSI CERT-Bund (WID) · Dec 9, 2025
- ALAS2-2020-1440 Important: kernel security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jul 29, 2025
- SUSE-SU-2020:1605-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2020-5755 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jul 10, 2020
- ELSA-2020-2427 Important: kernel security and bug fix update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jun 10, 2020
- ELSA-2020-5714 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jun 9, 2020
References
- https://patchwork.kernel.org/patch/11447049/
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.5
- https://github.com/torvalds/linux/commit/2f95fa5c955d0a9987ffdc3a095e2f4e62c5f2a9
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2f95fa5c955d0a9987ffdc3a095e2f4e62c5f2a9
- USN-4367-1 vendor-advisory
- USN-4368-1 vendor-advisory
- USN-4363-1 vendor-advisory
- USN-4369-1 vendor-advisory
- https://security.netapp.com/advisory/ntap-20200608-0001/
- openSUSE-SU-2020:0801 vendor-advisory