Description
An issue was discovered in the Linux kernel before 4.20. There is a race condition in smp_task_timedout() and smp_task_done() in drivers/scsi/libsas/sas_expander.c, leading to a use-after-free.
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 | 5.2.6-1 | — |
| Debian 13 | linux | 5.2.6-1 | — |
| Debian 12 | linux | 5.2.6-1 | — |
| Debian 10 | linux | 4.19.37-5+deb10u2 | DSA-4495-1 |
| Debian 9 | linux | 4.9.168-1+deb9u5 | DSA-4497-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 8 | linux | 3.16.72-1 | DLA-1884-1 |
| Debian 8 | linux-4.9 | 4.9.168-1+deb9u5~deb8u1 | DLA-1885-1 |
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-gke +3 | No fix yet | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-44.47 | — |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1032.34 | — |
| Ubuntu 18.04 LTS | linux-azure | 4.15.0-1037.39 | — |
| Ubuntu 18.04 LTS | linux-gcp | 4.15.0-1027.28 | — |
| Ubuntu 18.04 LTS | linux-gcp-edge | 4.18.0-1006.7~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-hwe | 4.18.0-14.15~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1029.29 | — |
| Ubuntu 18.04 LTS | linux-oem | 4.15.0-1033.38 | — |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1031.33 | — |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1053.57 | — |
| Ubuntu 16.04 LTS | linux | 4.4.0-157.185 | USN-4076-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1090.101 | USN-4076-1 |
| Ubuntu 16.04 LTS | linux-aws-hwe | 4.15.0-1032.34~16.04.1 | — |
| Ubuntu 16.04 LTS | linux-azure | 4.15.0-1037.39~16.04.1 | — |
| Ubuntu 16.04 LTS | linux-gcp | 4.15.0-1027.28~16.04.1 | — |
| Ubuntu 16.04 LTS | linux-hwe | 4.15.0-45.48~16.04.1 | — |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1052.59 | USN-4076-1 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1117.126 | USN-4076-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1121.127 | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | linux-azure | 4.15.0-1037.39~14.04.2 | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1015.20 | — |
| Ubuntu Pro 14.04 LTS | linux | No fix yet | — |
| Ubuntu Pro 14.04 LTS | linux-aws | 4.4.0-1054.58 | — |
| Ubuntu Pro 14.04 LTS | linux-lts-xenial | 4.4.0-164.192~14.04.1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | kernel +15 | 3.10.0-1160.el7 | RHSA-2020:4060 |
| RHEL 7 | kernel-rt +10 | 3.10.0-1160.rt56.1131.el7 | RHSA-2020:4062 |
| RHEL 7 | perf +3 | 3.10.0-957.65.1.el7 | RHSA-2020:5656, RHSA-2020:4060 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7.7 EUS | perf +18 | 3.10.0-1062.43.1.el7 | RHSA-2021:0019 |
| RHEL 7.6 EUS | perf +19 | 3.10.0-957.65.1.el7 | RHSA-2020:5656 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | kernel-azure +2 | 4.12.14-8.13.1 | SUSE-SU-2019:2069-1 |
| SLES 15 SP1 | kernel-docs +5 | 4.12.14-197.10.1 | SUSE-SU-2019:1854-1 |
| SLES 15 | kernel-azure +2 | 4.12.14-5.33.1 | SUSE-SU-2019:1829-1 |
| SLES 15 | kernel-docs +6 | 4.12.14-150.27.1 | SUSE-SU-2019:1855-1 |
| SLES 12 SP5 | kernel-azure +2 | 4.12.14-16.13.1 | SUSE-SU-2020:1118-1 |
| SLES 12 SP5 | kernel-docs +4 | 4.12.14-122.20.1 | SUSE-SU-2020:1142-1 |
| SLES 12 SP4 | kernel-docs +4 | 4.12.14-95.24.1 | SUSE-SU-2019:1851-1 |
| SLES 12 SP3 | kernel-syms +2 | 4.4.180-94.100.1 | SUSE-SU-2019:1852-1 |
| SLES 12 SP3 | kgraft-patch-SLE12-SP3_Update_27 | 1-4.3.1 | SUSE-SU-2019:1852-1 |
Show 20 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | kernel-syms +2 | 4.4.121-92.117.1 | SUSE-SU-2019:1823-2, SUSE-SU-2019:1823-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_31 | 1-3.3.1 | SUSE-SU-2019:1823-1 |
| SLES 12 SP1 | kernel-xen +3 | 3.12.74-60.64.118.1 | SUSE-SU-2019:1870-1 |
| SLES 12 SP1 | kgraft-patch-SLE12-SP1_Update_35 | 1-2.3.1 | SUSE-SU-2019:1870-1 |
| SLES 12 | kernel-ec2 | 3.12.74-60.64.118.1 | SUSE-SU-2019:1870-1 |
| SLES 11 SP4 | kernel-ec2 +8 | 3.0.101-108.98.1 | SUSE-SU-2019:14127-1 |
| SLES for SAP 12 SP5 | kernel-azure +2 | 4.12.14-16.13.1 | SUSE-SU-2020:1118-1 |
| SLES for SAP 12 SP5 | kernel-syms +2 | 4.12.14-122.20.1 | SUSE-SU-2020:1142-1 |
| SLES for SAP 12 SP4 | kernel-syms +2 | 4.12.14-95.24.1 | SUSE-SU-2019:1851-1 |
| SLES for SAP 12 SP3 | kernel-syms +2 | 4.4.180-94.100.1 | SUSE-SU-2019:1852-1 |
| SLES for SAP 12 SP3 | kgraft-patch-SLE12-SP3_Update_27 | 1-4.3.1 | SUSE-SU-2019:1852-1 |
| SLES for SAP 12 SP2 | kernel-syms +2 | 4.4.121-92.117.1 | SUSE-SU-2019:1823-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_31 | 1-3.3.1 | SUSE-SU-2019:1823-1 |
| SLES for SAP 12 SP1 | kernel-xen +3 | 3.12.74-60.64.118.1 | SUSE-SU-2019:1870-1 |
| SLES for SAP 12 SP1 | kgraft-patch-SLE12-SP1_Update_35 | 1-2.3.1 | SUSE-SU-2019:1870-1 |
| SLE Real Time 12 SP5 | kernel-rt +3 | 4.12.14-10.8.1 | SUSE-SU-2020:1084-1 |
| SLE Real Time 12 SP4 | kernel-rt +3 | 4.12.14-8.3.1 | SUSE-SU-2019:2450-1 |
| SLE Live Patching 15 SP1 | kernel-default | 4.12.14-197.10.1 | SUSE-SU-2019:1854-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_3 | 1-3.3.1 | SUSE-SU-2019:1854-1 |
| SLE Live Patching 15 | kernel-default | 4.12.14-150.27.1 | SUSE-SU-2019:1855-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_12 | 1-1.5.1 | SUSE-SU-2019:1855-1 |
| SLE Live Patching 12 SP5 | kernel-default | 4.12.14-122.20.1 | SUSE-SU-2020:1142-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_4 | 1-8.3.1 | SUSE-SU-2020:1142-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_6 | 1-6.5.1 | SUSE-SU-2019:1851-1 |
| SUSE Real Time Module 15 SP1 | kernel-rt +3 | 4.12.14-14.8.1 | SUSE-SU-2019:2430-1 |
| SUSE OpenStack Cloud 8 | kernel-syms +2 | 4.4.180-94.100.1 | SUSE-SU-2019:1852-1 |
| SUSE OpenStack Cloud 8 | kgraft-patch-SLE12-SP3_Update_27 | 1-4.3.1 | SUSE-SU-2019:1852-1 |
| SUSE OpenStack Cloud 7 | kernel-syms +2 | 4.4.121-92.117.1 | SUSE-SU-2019:1823-1 |
| SUSE OpenStack Cloud 7 | kgraft-patch-SLE12-SP2_Update_31 | 1-3.3.1 | SUSE-SU-2019:1823-1 |
| SUSE Enterprise Storage 5 | kernel-syms +2 | 4.4.180-94.100.1 | SUSE-SU-2019:1852-1 |
| SUSE Enterprise Storage 5 | kgraft-patch-SLE12-SP3_Update_27 | 1-4.3.1 | SUSE-SU-2019:1852-1 |
| SUSE Enterprise Storage 4 | kernel-syms +2 | 4.4.121-92.117.1 | SUSE-SU-2019:1823-1 |
| SUSE Enterprise Storage 4 | kgraft-patch-SLE12-SP2_Update_31 | 1-3.3.1 | SUSE-SU-2019:1823-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.1 | kernel-docs +8 | 4.12.14-lp151.28.10.1 | openSUSE-SU-2019:1757-1 |
| openSUSE Leap 15.0 | kernel-docs +8 | 4.12.14-lp150.12.67.1 | openSUSE-SU-2019:1716-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | kernel-uek +5 | 4.1.12-124.28.1.el7uek | ELSA-2019-4685, ELSA-2019-4670 |
| Oracle Linux 7 | kernel-uek-tools +3 | 4.14.35-1902.2.0.el7uek | ELSA-2019-4685 |
| Oracle Linux 7 | perf +12 | 3.10.0-1160.el7 | ELSA-2020-4060, ELSA-2019-4685 |
Advisories 29
- RHSA-2020:4062 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2020:4060 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- USN-4076-1 linux, linux-aws, linux-kvm, linux-raspi2 vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- RHSA-2021:0019 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2020:5656 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- DSA-4497-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-4495-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1885-1 linux-4.9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1884-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2019:1823-2 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1855-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1851-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2450-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1852-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1829-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:1757-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1118-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2069-1 Security update for the Linux Kernel for Azure SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1870-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1084-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:14127-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1142-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2430-1 Security update for kernel-source-rt SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1823-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:1716-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1854-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2020-4060 Important: kernel security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 6, 2020
- ELSA-2019-4685 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jun 17, 2019
- ELSA-2019-4670 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jun 4, 2019
References
- https://github.com/torvalds/linux/commit/b90cd6f2b905905fb42671009dc0e27c310a16ae
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b90cd6f2b905905fb42671009dc0e27c310a16ae
- 108196 vdb-entry
- https://support.f5.com/csp/article/K11225249
- https://security.netapp.com/advisory/ntap-20190719-0003/
- openSUSE-SU-2019:1716 vendor-advisory
- openSUSE-SU-2019:1757 vendor-advisory
- USN-4076-1 vendor-advisory
- DSA-4495 vendor-advisory
- 20190812 [SECURITY] [DSA 4495-1] linux security update mailing-list
- 20190813 [SECURITY] [DSA 4497-1] linux security update mailing-list
- DSA-4497 vendor-advisory
- [debian-lts-announce] 20190814 [SECURITY] [DLA 1884-1] linux security update mailing-list
- [debian-lts-announce] 20190814 [SECURITY] [DLA 1885-1] linux-4.9 security update mailing-list