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OpenAdvisories
Medium · 4.4 CVE-2023-52492 EUVD-2023-57117GHSA-6hr8-534p-8986

dmaengine: fix NULL pointer in channel unregistration function

Published Feb 29, 2024 · 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-5.8 Package: linux-aws-6.2 Package: linux-aws-6.5 Package: linux-aws-fips Package: linux-azure 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-5.8 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-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-5.8 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-5.8 Package: linux-hwe-6.2 Package: linux-hwe-6.5 Package: linux-hwe-edge Package: linux-ibm Package: linux-ibm-5.15 Package: linux-intel-5.13 Package: linux-intel-iot-realtime Package: linux-intel-iotg Package: linux-intel-iotg-5.15 Package: linux-kvm Package: linux-lowlatency Package: linux-lowlatency-hwe-5.15 Package: linux-lowlatency-hwe-5.19 Package: linux-lowlatency-hwe-6.2 Package: linux-lowlatency-hwe-6.5 Package: linux-nvidia Package: linux-nvidia-6.2 Package: linux-nvidia-6.5 Package: linux-nvidia-tegra Package: linux-nvidia-tegra-5.15 Package: linux-nvidia-tegra-igx 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-6.5 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-5.8 Package: linux-oracle-6.5 Package: linux-raspi 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:

dmaengine: fix NULL pointer in channel unregistration function

__dma_async_device_channel_register() can fail. In case of failure,
chan->local is freed (with free_percpu()), and chan->local is nullified.
When dma_async_device_unregister() is called (because of managed API or
intentionally by DMA controller driver), channels are unconditionally
unregistered, leading to this NULL pointer:
[ 1.318693] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000d0
[...]
[ 1.484499] Call trace:
[ 1.486930] device_del+0x40/0x394
[ 1.490314] device_unregister+0x20/0x7c
[ 1.494220] __dma_async_device_channel_unregister+0x68/0xc0

Look at dma_async_device_register() function error path, channel device
unregistration is done only if chan->local is not NULL.

Then add the same condition at the beginning of
__dma_async_device_channel_unregister() function, to avoid NULL pointer
issue whatever the API used to reach this function.

Affected products

VendorProductAffectedFixed
Linux Linux 5.6 5.10.210

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.

ReleasePackageFixed inAdvisory
Debian 14 linux 6.6.15-1 —
Debian 13 linux 6.6.15-1 —
Debian 12 linux 6.1.76-1 —
Debian 11 linux 5.10.216-1 DSA-5681-1
Debian 10 linux-5.10 5.10.216-1~deb10u1 DLA-3842-1
ReleasePackageFixed inAdvisory
Ubuntu Nvidia-BlueField 22.04 LTS linux-bluefield 5.15.0-1043.45 —
Ubuntu 22.04 LTS linux +1 5.15.0-106.116 USN-6766-1
Ubuntu 22.04 LTS linux-aws 5.15.0-1061.67 USN-6766-3
Ubuntu 22.04 LTS linux-azure 5.15.0-1063.72 USN-6766-1
Ubuntu 22.04 LTS linux-azure-6.5 6.5.0-1022.23~22.04.1 USN-6819-1
Ubuntu 22.04 LTS linux-azure-fde 5.15.0-1063.72.1 USN-6766-1
Ubuntu 22.04 LTS linux-gcp 5.15.0-1059.67 USN-6766-1
Ubuntu 22.04 LTS linux-gcp-6.5 6.5.0-1022.24~22.04.1 USN-6818-1
Ubuntu 22.04 LTS linux-gke +1 5.15.0-1058.63 USN-6766-1
Ubuntu 22.04 LTS linux-gkeop 5.15.0-1044.51 USN-6766-1
Ubuntu 22.04 LTS linux-hwe-6.5 6.5.0-41.41~22.04.2 USN-6818-4
Ubuntu 22.04 LTS linux-ibm +1 5.15.0-1054.57 USN-6766-2, USN-6766-1
Ubuntu 22.04 LTS linux-intel-iotg 5.15.0-1057.63 USN-6795-1
Ubuntu 22.04 LTS linux-lowlatency-hwe-6.5 6.5.0-41.41.1~22.04.1 USN-6818-1
Ubuntu 22.04 LTS linux-nvidia 5.15.0-1054.55 USN-6766-1
Ubuntu 22.04 LTS linux-nvidia-6.5 6.5.0-1021.22 USN-6818-3
Ubuntu 22.04 LTS linux-nvidia-tegra 5.15.0-1026.26 —
Ubuntu 22.04 LTS linux-nvidia-tegra-igx 5.15.0-1015.15 —
Ubuntu 22.04 LTS linux-oem-6.5 6.5.0-1024.25 USN-6819-3
Ubuntu 22.04 LTS linux-oracle 5.15.0-1059.65 USN-6766-1
Ubuntu 22.04 LTS linux-oracle-6.5 6.5.0-1024.24~22.04.1 USN-6819-4
Ubuntu 22.04 LTS linux-riscv +22 No fix yet —
Ubuntu 22.04 LTS linux-riscv-6.5 6.5.0-40.40.1~22.04.1 —
Ubuntu 22.04 LTS linux-starfive-6.5 6.5.0-1015.16~22.04.1 USN-6819-1
Ubuntu 22.04 LTS linux-xilinx-zynqmp 5.15.0-1030.34 —
Ubuntu 20.04 LTS linux-aws-5.15 5.15.0-1061.67~20.04.1 USN-6766-3
Ubuntu 20.04 LTS linux-azure-5.15 5.15.0-1063.72~20.04.1 USN-6766-1
Ubuntu 20.04 LTS linux-azure-fde-5.15 5.15.0-1063.72~20.04.1.1 USN-6766-1
Ubuntu 20.04 LTS linux-gcp-5.15 5.15.0-1059.67~20.04.1 USN-6766-1
Ubuntu 20.04 LTS linux-gke +26 No fix yet —
Ubuntu 20.04 LTS linux-gkeop-5.15 5.15.0-1044.51~20.04.1 USN-6766-1
Ubuntu 20.04 LTS linux-hwe-5.15 +1 5.15.0-106.116~20.04.1 USN-6766-2, USN-6766-1
Ubuntu 20.04 LTS linux-ibm-5.15 5.15.0-1054.57~20.04.1 USN-6766-1
Ubuntu 20.04 LTS linux-intel-iotg-5.15 5.15.0-1058.64~20.04.1 USN-6828-1
Ubuntu 20.04 LTS linux-nvidia-tegra-5.15 5.15.0-1027.27~20.04.1 —
Ubuntu 20.04 LTS linux-oracle-5.15 5.15.0-1059.65~20.04.1 USN-6766-1
Ubuntu 20.04 LTS linux-riscv-5.15 5.15.0-1057.61~20.04.1 —
Ubuntu 18.04 LTS linux-gcp +13 No fix yet —
Ubuntu 16.04 LTS linux-hwe-edge No fix yet —
Show 4 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu Pro Realtime 24.04 LTS linux-raspi-realtime 6.8.0-2001.1 —
Ubuntu Pro Realtime 22.04 LTS linux-intel-iot-realtime 5.15.0-1054.56 —
Ubuntu Pro Realtime 22.04 LTS linux-realtime 5.15.0-1062.70 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-aws-fips 5.15.0-1061.67+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-azure-fips 5.15.0-1063.72+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-fips 5.15.0-106.116+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-gcp-fips 5.15.0-1059.67+fips1 —
Ubuntu Pro FIPS-preview 22.04 LTS linux-fips +3 No fix yet —
ReleasePackageFixed inAdvisory
RHEL 9 bpftool 7.4.0-503.11.1.el9_5 RHSA-2024:9315
RHEL 9 rv +67 5.14.0-503.11.1.el9_5 RHSA-2024:9315
RHEL 8 kernel-rt +12 4.18.0-553.27.1.rt7.368.el8_10 RHSA-2024:8870
RHEL 8 perf +26 4.18.0-553.27.1.el8_10 RHSA-2024:8856
Show 1 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
RHEL 9.4 EUS bpftool 7.3.0-427.68.1.el9_4 RHSA-2025:7526
RHEL 9.4 EUS rv +64 5.14.0-427.68.1.el9_4 RHSA-2025:7526

AlmaLinux

Errata ↗
ReleasePackageFixed inAdvisory
AlmaLinux 8 kernel-rt +9 4.18.0-553.27.1.rt7.368.el8_10 ALSA-2024:8870
AlmaLinux 8 perf +24 4.18.0-553.27.1.el8_10 ALSA-2024:8856

Rocky Linux

Errata ↗
ReleasePackageFixed inAdvisory
Rocky Linux 8 kernel 4.18.0-553.27.1.el8_10 RLSA-2024:8856
Rocky Linux 8 kernel-rt 4.18.0-553.27.1.rt7.368.el8_10 RLSA-2024:8870
ReleasePackageFixed inAdvisory
SLES 15 SP6 kernel-azure +1 6.4.0-150600.8.5.4 SUSE-SU-2024:2135-1
SLES 15 SP6 kernel-syms-azure 6.4.0-150600.8.5.1 SUSE-SU-2024:2135-1
SLES 15 SP5 kernel-64kb +6 5.14.21-150500.55.59.1 SUSE-SU-2024:1480-1
SLES 15 SP5 kernel-azure +2 5.14.21-150500.33.48.1 SUSE-SU-2024:1490-1
SLES 15 SP5 kernel-default-base 5.14.21-150500.55.59.1.150500.6.25.7 SUSE-SU-2024:1480-1
SLES 15 SP4 kernel-64kb +6 5.14.21-150400.24.116.1 SUSE-SU-2024:1321-1
SLES 15 SP4 kernel-default-base 5.14.21-150400.24.116.1.150400.24.54.5 SUSE-SU-2024:1321-1
SLES 15 SP3 kernel-64kb +7 5.3.18-150300.59.158.1 SUSE-SU-2024:1489-1
SLES 15 SP3 kernel-default-base 5.3.18-150300.59.158.1.150300.18.92.5 SUSE-SU-2024:1489-1
Show 16 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLES for SAP 15 SP4 kernel-default-base 5.14.21-150400.24.116.1.150400.24.54.5 SUSE-SU-2024:1321-1
SLES for SAP 15 SP4 kernel-docs +4 5.14.21-150400.24.116.1 SUSE-SU-2024:1321-1
SLES for SAP 15 SP3 kernel-default-base 5.3.18-150300.59.158.1.150300.18.92.5 SUSE-SU-2024:1489-1
SLES for SAP 15 SP3 kernel-docs +5 5.3.18-150300.59.158.1 SUSE-SU-2024:1489-1
SLE Micro 5.5 kernel-default 5.14.21-150500.55.59.1 SUSE-SU-2024:1480-1
SLE Micro 5.5 kernel-default-base 5.14.21-150500.55.59.1.150500.6.25.7 SUSE-SU-2024:1480-1
SLE Micro 5.5 kernel-rt +1 5.14.21-150500.13.47.1 SUSE-SU-2024:1466-1
SLE Micro 5.4 kernel-default 5.14.21-150400.24.116.1 SUSE-SU-2024:1321-1
SLE Micro 5.4 kernel-default-base 5.14.21-150400.24.116.1.150400.24.54.5 SUSE-SU-2024:1321-1
SLE Micro 5.4 kernel-rt +1 5.14.21-150400.15.76.1 SUSE-SU-2024:1320-1
SLE Micro 5.3 kernel-default 5.14.21-150400.24.116.1 SUSE-SU-2024:1321-1
SLE Micro 5.3 kernel-default-base 5.14.21-150400.24.116.1.150400.24.54.5 SUSE-SU-2024:1321-1
SLE Micro 5.3 kernel-rt +1 5.14.21-150400.15.76.1 SUSE-SU-2024:1320-1
SLE Micro 5.2 kernel-default 5.3.18-150300.59.158.1 SUSE-SU-2024:1489-1
SLE Micro 5.2 kernel-default-base 5.3.18-150300.59.158.1.150300.18.92.5 SUSE-SU-2024:1489-1
SLE Micro 5.2 kernel-rt +1 5.3.18-150300.166.1 SUSE-SU-2024:1465-1
SLE Micro 5.1 kernel-default 5.3.18-150300.59.158.1 SUSE-SU-2024:1489-1
SLE Micro 5.1 kernel-default-base 5.3.18-150300.59.158.1.150300.18.92.5 SUSE-SU-2024:1489-1
SLE Micro 5.1 kernel-rt +1 5.3.18-150300.166.1 SUSE-SU-2024:1465-1
SLE Live Patching 15 SP5 kernel-default 5.14.21-150500.55.59.1 SUSE-SU-2024:1480-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5-RT_Update_13 1-150500.11.3.1 SUSE-SU-2024:1466-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_12 1-150500.11.7.1 SUSE-SU-2024:1480-1
SLE Live Patching 15 SP4 kernel-default 5.14.21-150400.24.116.1 SUSE-SU-2024:1321-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4_Update_25 1-150400.9.5.1 SUSE-SU-2024:1321-1
SLE Live Patching 15 SP3 kernel-default 5.3.18-150300.59.158.1 SUSE-SU-2024:1489-1
SLE Live Patching 15 SP3 kernel-livepatch-SLE15-SP3_Update_43 1-150300.7.3.5 SUSE-SU-2024:1489-1
SLE HPC 15 SP4 kernel-64kb +5 5.14.21-150400.24.116.1 SUSE-SU-2024:1321-1
SLE HPC 15 SP4 kernel-default-base 5.14.21-150400.24.116.1.150400.24.54.5 SUSE-SU-2024:1321-1
SLE HPC 15 SP3 kernel-64kb +6 5.3.18-150300.59.158.1 SUSE-SU-2024:1489-1
SLE HPC 15 SP3 kernel-default-base 5.3.18-150300.59.158.1.150300.18.92.5 SUSE-SU-2024:1489-1
SUSE Real Time Module 15 SP5 kernel-rt +3 5.14.21-150500.13.47.1 SUSE-SU-2024:1466-1
SUSE Manager Server 4.3 kernel-default-base 5.14.21-150400.24.116.1.150400.24.54.5 SUSE-SU-2024:1321-1
SUSE Manager Server 4.3 kernel-syms +3 5.14.21-150400.24.116.1 SUSE-SU-2024:1321-1
SUSE Manager Proxy 4.3 kernel-default-base 5.14.21-150400.24.116.1.150400.24.54.5 SUSE-SU-2024:1321-1
SUSE Manager Proxy 4.3 kernel-syms +2 5.14.21-150400.24.116.1 SUSE-SU-2024:1321-1
SUSE Enterprise Storage 7.1 kernel-64kb +6 5.3.18-150300.59.158.1 SUSE-SU-2024:1489-1
SUSE Enterprise Storage 7.1 kernel-default-base 5.3.18-150300.59.158.1.150300.18.92.5 SUSE-SU-2024:1489-1
ReleasePackageFixed inAdvisory
openSUSE Leap 15.6 kernel-azure +1 6.4.0-150600.8.5.4 SUSE-SU-2024:2135-1
openSUSE Leap 15.6 kernel-syms-azure 6.4.0-150600.8.5.1 SUSE-SU-2024:2135-1
openSUSE Leap 15.5 dtb-aarch64 +10 5.14.21-150500.55.59.1 SUSE-SU-2024:1480-1
openSUSE Leap 15.5 kernel-azure +2 5.14.21-150500.33.48.1 SUSE-SU-2024:1490-1
openSUSE Leap 15.5 kernel-default-base 5.14.21-150500.55.59.1.150500.6.25.7 SUSE-SU-2024:1480-1
openSUSE Leap 15.5 kernel-rt +3 5.14.21-150500.13.47.1 SUSE-SU-2024:1466-1
Show 2 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
openSUSE Leap Micro 5.4 kernel-default 5.14.21-150400.24.116.1 SUSE-SU-2024:1321-1
openSUSE Leap Micro 5.4 kernel-default-base 5.14.21-150400.24.116.1.150400.24.54.5 SUSE-SU-2024:1321-1
openSUSE Leap Micro 5.4 kernel-rt 5.14.21-150400.15.76.1 SUSE-SU-2024:1320-1
openSUSE Leap Micro 5.3 kernel-default 5.14.21-150400.24.116.1 SUSE-SU-2024:1321-1
openSUSE Leap Micro 5.3 kernel-default-base 5.14.21-150400.24.116.1.150400.24.54.5 SUSE-SU-2024:1321-1
openSUSE Leap Micro 5.3 kernel-rt 5.14.21-150400.15.76.1 SUSE-SU-2024:1320-1

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2023 kernel-livepatch-6.1.77-99.164 1.0-0.amzn2023 ALAS2023-2024-517
Amazon Linux 2023 perf +14 6.1.77-99.164.amzn2023 ALAS2023-2024-517

Oracle Linux

ReleasePackageFixed inAdvisory
Oracle Linux 9 bpftool 7.4.0-503.11.1.el9_5 ELSA-2024-9315
Oracle Linux 9 rv +28 5.14.0-503.11.1.el9_5 ELSA-2024-9315
Oracle Linux 8 perf +19 4.18.0-553.27.1.el8_10 ELSA-2024-8856

Advisories 34

References