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OpenAdvisories
High · 7.8 CVE-2022-50422 EUVD-2025-32865GHSA-j5vv-gj42-cwrm

scsi: libsas: Fix use-after-free bug in smp_execute_task_sg()

Published Oct 1, 2025 · Updated May 11, 2026 · Assigned by Linux

Vendor: Linux Product: Linux Package: linux Package: linux Package: linux-allwinner-5.19 Package: linux-aws Package: linux-aws-5.0 Package: linux-aws-5.11 Package: linux-aws-5.13 Package: linux-aws-5.15 Package: linux-aws-5.19 Package: linux-aws-5.3 Package: linux-aws-5.4 Package: linux-aws-5.8 Package: linux-aws-6.2 Package: linux-aws-6.5 Package: linux-aws-fips Package: linux-aws-hwe Package: linux-azure Package: linux-azure-4.15 Package: linux-azure-5.11 Package: linux-azure-5.13 Package: linux-azure-5.15 Package: linux-azure-5.19 Package: linux-azure-5.3 Package: linux-azure-5.4 Package: linux-azure-5.8 Package: linux-azure-6.11 Package: linux-azure-6.2 Package: linux-azure-6.5 Package: linux-azure-edge Package: linux-azure-fde Package: linux-azure-fde-5.19 Package: linux-azure-fde-6.2 Package: linux-azure-fips Package: linux-bluefield Package: linux-fips Package: linux-gcp Package: linux-gcp-4.15 Package: linux-gcp-5.11 Package: linux-gcp-5.13 Package: linux-gcp-5.15 Package: linux-gcp-5.19 Package: linux-gcp-5.3 Package: linux-gcp-5.4 Package: linux-gcp-5.8 Package: linux-gcp-6.11 Package: linux-gcp-6.2 Package: linux-gcp-6.5 Package: linux-gcp-fips Package: linux-gke Package: linux-gke-4.15 Package: linux-gke-5.15 Package: linux-gke-5.4 Package: linux-gkeop Package: linux-gkeop-5.15 Package: linux-gkeop-5.4 Package: linux-hwe Package: linux-hwe-5.11 Package: linux-hwe-5.13 Package: linux-hwe-5.15 Package: linux-hwe-5.19 Package: linux-hwe-5.4 Package: linux-hwe-5.8 Package: linux-hwe-6.11 Package: linux-hwe-6.2 Package: linux-hwe-6.5 Package: linux-hwe-edge Package: linux-ibm Package: linux-ibm-5.4 Package: linux-intel Package: linux-intel-5.13 Package: linux-intel-iot-realtime Package: linux-intel-iotg Package: linux-intel-iotg-5.15 Package: linux-iot Package: linux-kvm Package: linux-lowlatency Package: linux-lowlatency-hwe-5.15 Package: linux-lowlatency-hwe-5.19 Package: linux-lowlatency-hwe-6.11 Package: linux-lowlatency-hwe-6.2 Package: linux-lowlatency-hwe-6.5 Package: linux-lts-xenial Package: linux-nvidia Package: linux-nvidia-6.2 Package: linux-nvidia-6.5 Package: linux-oem Package: linux-oem-5.10 Package: linux-oem-5.13 Package: linux-oem-5.14 Package: linux-oem-5.17 Package: linux-oem-5.6 Package: linux-oem-6.0 Package: linux-oem-6.1 Package: linux-oem-6.11 Package: linux-oem-6.5 Package: linux-oem-6.8 Package: linux-oracle Package: linux-oracle-5.0 Package: linux-oracle-5.11 Package: linux-oracle-5.13 Package: linux-oracle-5.15 Package: linux-oracle-5.3 Package: linux-oracle-5.4 Package: linux-oracle-5.8 Package: linux-oracle-6.5 Package: linux-raspi Package: linux-raspi-5.4 Package: linux-raspi-realtime Package: linux-raspi2 Package: linux-realtime Package: linux-riscv Package: linux-riscv-5.11 Package: linux-riscv-5.15 Package: linux-riscv-5.19 Package: linux-riscv-5.8 Package: linux-riscv-6.5 Package: linux-starfive-5.19 Package: linux-starfive-6.2 Package: linux-starfive-6.5 Package: linux-vmware Package: linux-xilinx-zynqmp Platform: Linux Ecosystem: Debian Ecosystem: Ubuntu

Description

In the Linux kernel, the following vulnerability has been resolved:

scsi: libsas: Fix use-after-free bug in smp_execute_task_sg()

When executing SMP task failed, the smp_execute_task_sg() calls del_timer()
to delete "slow_task->timer". However, if the timer handler
sas_task_internal_timedout() is running, the del_timer() in
smp_execute_task_sg() will not stop it and a UAF will happen. The process
is shown below:

(thread 1) | (thread 2)
smp_execute_task_sg() | sas_task_internal_timedout()
... |
del_timer() |
... | ...
sas_free_task(task) |
kfree(task->slow_task) //FREE|
| task->slow_task->... //USE

Fix by calling del_timer_sync() in smp_execute_task_sg(), which makes sure
the timer handler have finished before the "task->slow_task" is
deallocated.

Affected products

VendorProductAffectedFixed
Linux Linux 2.6.19 5.4.220

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 ↗
ReleasePackageFixed inAdvisory
Debian 14 linux 6.0.3-1 —
Debian 13 linux 6.0.3-1 —
Debian 12 linux 6.0.3-1 —

Ubuntu

Security tracker ↗
ReleasePackageFixed inAdvisory
Ubuntu Nvidia-BlueField 22.04 LTS linux-bluefield 5.15.0-1014.16 —
Ubuntu 24.04 LTS linux-intel +9 No fix yet —
Ubuntu 22.04 LTS linux +1 5.15.0-60.66 —
Ubuntu 22.04 LTS linux-aws 5.15.0-1030.34 —
Ubuntu 22.04 LTS linux-azure 5.15.0-1033.40 —
Ubuntu 22.04 LTS linux-azure-fde 5.15.0-1033.40.1 —
Ubuntu 22.04 LTS linux-gcp 5.15.0-1029.36 —
Ubuntu 22.04 LTS linux-gke 5.15.0-1027.32 —
Ubuntu 22.04 LTS linux-gkeop 5.15.0-1015.19 —
Ubuntu 22.04 LTS linux-ibm 5.15.0-1025.28 —
Ubuntu 22.04 LTS linux-intel-iotg 5.15.0-1025.30 —
Ubuntu 22.04 LTS linux-kvm 5.15.0-1028.33 —
Ubuntu 22.04 LTS linux-nvidia 5.15.0-1017.17 —
Ubuntu 22.04 LTS linux-oracle 5.15.0-1029.35 —
Ubuntu 22.04 LTS linux-raspi 5.15.0-1024.26 —
Ubuntu 22.04 LTS linux-riscv +32 No fix yet —
Ubuntu 20.04 LTS linux 5.4.0-139.156 —
Ubuntu 20.04 LTS linux-aws 5.4.0-1096.104 —
Ubuntu 20.04 LTS linux-aws-5.15 5.15.0-1030.34~20.04.1 —
Ubuntu 20.04 LTS linux-azure 5.4.0-1103.109 —
Ubuntu 20.04 LTS linux-azure-5.15 5.15.0-1033.40~20.04.1 —
Ubuntu 20.04 LTS linux-bluefield 5.4.0-1058.64 —
Ubuntu 20.04 LTS linux-gcp 5.4.0-1100.109 —
Ubuntu 20.04 LTS linux-gcp-5.15 5.15.0-1029.36~20.04.1 —
Ubuntu 20.04 LTS linux-gke +28 No fix yet —
Ubuntu 20.04 LTS linux-hwe-5.15 +1 5.15.0-60.66~20.04.1 —
Ubuntu 20.04 LTS linux-ibm 5.4.0-1044.49 —
Ubuntu 20.04 LTS linux-intel-iotg-5.15 5.15.0-1025.30~20.04.1 —
Ubuntu 20.04 LTS linux-iot 5.4.0-1012.14 —
Ubuntu 20.04 LTS linux-kvm 5.4.0-1086.92 —
Ubuntu 20.04 LTS linux-oracle 5.4.0-1093.102 —
Ubuntu 20.04 LTS linux-oracle-5.15 5.15.0-1029.35~20.04.1 —
Ubuntu 20.04 LTS linux-raspi 5.4.0-1080.91 —
Ubuntu 20.04 LTS linux-riscv-5.15 5.15.0-1029.33~20.04.1 —
Ubuntu 20.04 LTS linux-xilinx-zynqmp 5.4.0-1021.25 —
Ubuntu 18.04 LTS linux-aws-5.4 5.4.0-1096.104~18.04.1 —
Ubuntu 18.04 LTS linux-azure-5.4 5.4.0-1103.109~18.04.1 —
Ubuntu 18.04 LTS linux-gcp +14 No fix yet —
Ubuntu 18.04 LTS linux-gcp-5.4 5.4.0-1100.109~18.04.1 —
Ubuntu 18.04 LTS linux-hwe-5.4 5.4.0-139.156~18.04.1 —
Ubuntu 18.04 LTS linux-ibm-5.4 5.4.0-1044.49~18.04.1 —
Ubuntu 18.04 LTS linux-oracle-5.4 5.4.0-1093.102~18.04.1 —
Ubuntu 18.04 LTS linux-raspi-5.4 5.4.0-1080.91~18.04.1 —
Show 10 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu 16.04 LTS linux-hwe-edge No fix yet —
Ubuntu Pro FIPS 20.04 LTS linux-fips +3 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 5.4.0-1096.104+fips1 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-azure-fips 5.4.0-1103.109+fips1 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-fips 5.4.0-1072.81 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-gcp-fips 5.4.0-1100.109+fips1 —
Ubuntu Pro FIPS-updates 18.04 LTS linux-fips +3 No fix yet —
Ubuntu Pro FIPS-updates 16.04 LTS linux-fips No fix yet —
Ubuntu Pro 18.04 LTS linux +5 No fix yet —
Ubuntu Pro 16.04 LTS linux +7 No fix yet —
Ubuntu Pro 14.04 LTS linux +3 No fix yet —

SUSE

Security tracker ↗
ReleasePackageFixed inAdvisory
SLES 15 SP5 kernel-64kb +6 5.14.21-150500.55.124.1 SUSE-SU-2025:03615-1
SLES 15 SP5 kernel-default-base 5.14.21-150500.55.124.1.150500.6.59.1 SUSE-SU-2025:03615-1
SLES 15 SP4 kernel-64kb +6 5.14.21-150400.24.179.1 SUSE-SU-2025:03628-1
SLES 15 SP4 kernel-default-base 5.14.21-150400.24.179.1.150400.24.92.1 SUSE-SU-2025:03628-1
SLES 15 SP3 kernel-64kb +7 5.3.18-150300.59.221.1 SUSE-SU-2025:03626-1
SLES 15 SP3 kernel-default-base 5.3.18-150300.59.221.1.150300.18.132.1 SUSE-SU-2025:03626-1
SLES 12 SP5 kernel-syms +2 4.12.14-122.275.1 SUSE-SU-2025:03614-1
Show 18 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLES for SAP 15 SP5 kernel-default-base 5.14.21-150500.55.124.1.150500.6.59.1 SUSE-SU-2025:03615-1
SLES for SAP 15 SP5 kernel-docs +4 5.14.21-150500.55.124.1 SUSE-SU-2025:03615-1
SLES for SAP 15 SP4 kernel-default-base 5.14.21-150400.24.179.1.150400.24.92.1 SUSE-SU-2025:03628-1
SLES for SAP 15 SP4 kernel-docs +4 5.14.21-150400.24.179.1 SUSE-SU-2025:03628-1
SLES for SAP 15 SP3 kernel-default-base 5.3.18-150300.59.221.1.150300.18.132.1 SUSE-SU-2025:03626-1
SLES for SAP 15 SP3 kernel-docs +5 5.3.18-150300.59.221.1 SUSE-SU-2025:03626-1
SLE Micro 5.5 kernel-default-base 5.14.21-150500.55.124.1.150500.6.59.1 SUSE-SU-2025:03615-1
SLE Micro 5.5 kernel-rt +1 5.14.21-150500.13.109.1 SUSE-SU-2025:3761-1
SLE Micro 5.5 kernel-source +1 5.14.21-150500.55.124.1 SUSE-SU-2025:03615-1
SLE Micro 5.4 kernel-default 5.14.21-150400.24.179.1 SUSE-SU-2025:03628-1
SLE Micro 5.4 kernel-default-base 5.14.21-150400.24.179.1.150400.24.92.1 SUSE-SU-2025:03628-1
SLE Micro 5.4 kernel-rt +1 5.14.21-150400.15.133.1 SUSE-SU-2025:3716-1
SLE Micro 5.3 kernel-default 5.14.21-150400.24.179.1 SUSE-SU-2025:03628-1
SLE Micro 5.3 kernel-default-base 5.14.21-150400.24.179.1.150400.24.92.1 SUSE-SU-2025:03628-1
SLE Micro 5.3 kernel-rt +1 5.14.21-150400.15.133.1 SUSE-SU-2025:3716-1
SLE Micro 5.2 kernel-default 5.3.18-150300.59.221.1 SUSE-SU-2025:03626-1
SLE Micro 5.2 kernel-default-base 5.3.18-150300.59.221.1.150300.18.132.1 SUSE-SU-2025:03626-1
SLE Micro 5.2 kernel-rt +1 5.3.18-150300.223.1 SUSE-SU-2025:03613-1
SLE Micro 5.1 kernel-default 5.3.18-150300.59.221.1 SUSE-SU-2025:03626-1
SLE Micro 5.1 kernel-default-base 5.3.18-150300.59.221.1.150300.18.132.1 SUSE-SU-2025:03626-1
SLE Micro 5.1 kernel-rt +1 5.3.18-150300.223.1 SUSE-SU-2025:03613-1
SLE Live Patching 15 SP5 kernel-default 5.14.21-150500.55.124.1 SUSE-SU-2025:03615-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_31 1-150500.11.3.1 SUSE-SU-2025:03615-1
SLE Live Patching 15 SP4 kernel-default 5.14.21-150400.24.179.1 SUSE-SU-2025:03628-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4_Update_45 1-150400.9.3.1 SUSE-SU-2025:03628-1
SLE Live Patching 15 SP3 kernel-default 5.3.18-150300.59.221.1 SUSE-SU-2025:03626-1
SLE Live Patching 15 SP3 kernel-livepatch-SLE15-SP3_Update_62 1-150300.7.3.1 SUSE-SU-2025:03626-1
SLE Live Patching 12 SP5 kernel-default 4.12.14-122.275.1 SUSE-SU-2025:03614-1
SLE Live Patching 12 SP5 kgraft-patch-SLE12-SP5_Update_73 1-8.3.1 SUSE-SU-2025:03614-1
SLE HPC 15 SP5 kernel-64kb +5 5.14.21-150500.55.124.1 SUSE-SU-2025:03615-1
SLE HPC 15 SP5 kernel-default-base 5.14.21-150500.55.124.1.150500.6.59.1 SUSE-SU-2025:03615-1
SLE HPC 15 SP4 kernel-64kb +5 5.14.21-150400.24.179.1 SUSE-SU-2025:03628-1
SLE HPC 15 SP4 kernel-default-base 5.14.21-150400.24.179.1.150400.24.92.1 SUSE-SU-2025:03628-1
SLE HPC 15 SP3 kernel-64kb +6 5.3.18-150300.59.221.1 SUSE-SU-2025:03626-1
SLE HPC 15 SP3 kernel-default-base 5.3.18-150300.59.221.1.150300.18.132.1 SUSE-SU-2025:03626-1
SUSE Manager Server LTS 4.3 kernel-default-base 5.14.21-150400.24.179.1.150400.24.92.1 SUSE-SU-2025:03628-1
SUSE Manager Server LTS 4.3 kernel-syms +3 5.14.21-150400.24.179.1 SUSE-SU-2025:03628-1
SUSE Manager Proxy LTS 4.3 kernel-default-base 5.14.21-150400.24.179.1.150400.24.92.1 SUSE-SU-2025:03628-1
SUSE Manager Proxy LTS 4.3 kernel-syms +2 5.14.21-150400.24.179.1 SUSE-SU-2025:03628-1
SUSE Enterprise Storage 7.1 kernel-64kb +6 5.3.18-150300.59.221.1 SUSE-SU-2025:03626-1
SUSE Enterprise Storage 7.1 kernel-default-base 5.3.18-150300.59.221.1.150300.18.132.1 SUSE-SU-2025:03626-1

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2 kernel-livepatch-4.14.355-280.706 1.0-0.amzn2 ALAS2-2025-3053
Amazon Linux 2 perf +8 4.14.355-280.706.amzn2 ALAS2-2025-3053

Advisories 10

References