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Unscored CVE-2024-43889 EUVD-2024-40539GHSA-gq64-pw9q-3fw2

padata: Fix possible divide-by-0 panic in padata_mt_helper()

Published Aug 26, 2024 · Updated Oct 15, 2026 · Assigned by Linux

Vendor: Linux Product: Linux Package: kernel 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-6.8 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-6.8 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-6.8 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-6.8 Package: linux-hwe-edge Package: linux-ibm Package: linux-ibm-5.15 Package: linux-ibm-6.8 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-lowlatency-hwe-6.8 Package: linux-nvidia Package: linux-nvidia-6.2 Package: linux-nvidia-6.5 Package: linux-nvidia-6.8 Package: linux-nvidia-lowlatency 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-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-5.8 Package: linux-oracle-6.5 Package: linux-oracle-6.8 Package: linux-raspi Package: linux-raspi-realtime Package: linux-raspi2 Package: linux-realtime Package: linux-realtime-6.8 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-riscv-6.8 Package: linux-starfive-5.19 Package: linux-starfive-6.2 Package: linux-starfive-6.5 Package: linux-vmware Package: linux-xilinx Package: linux-xilinx-zynqmp Platform: Linux Ecosystem: Azure Linux Ecosystem: Debian Ecosystem: Ubuntu

Description

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

padata: Fix possible divide-by-0 panic in padata_mt_helper()

We are hit with a not easily reproducible divide-by-0 panic in padata.c at
bootup time.

[ 10.017908] Oops: divide error: 0000 1 PREEMPT SMP NOPTI
[ 10.017908] CPU: 26 PID: 2627 Comm: kworker/u1666:1 Not tainted 6.10.0-15.el10.x86_64 #1
[ 10.017908] Hardware name: Lenovo ThinkSystem SR950 [7X12CTO1WW]/[7X12CTO1WW], BIOS [PSE140J-2.30] 07/20/2021
[ 10.017908] Workqueue: events_unbound padata_mt_helper
[ 10.017908] RIP: 0010:padata_mt_helper+0x39/0xb0
:
[ 10.017963] Call Trace:
[ 10.017968] <TASK>
[ 10.018004] ? padata_mt_helper+0x39/0xb0
[ 10.018084] process_one_work+0x174/0x330
[ 10.018093] worker_thread+0x266/0x3a0
[ 10.018111] kthread+0xcf/0x100
[ 10.018124] ret_from_fork+0x31/0x50
[ 10.018138] ret_from_fork_asm+0x1a/0x30
[ 10.018147] </TASK>

Looking at the padata_mt_helper() function, the only way a divide-by-0
panic can happen is when ps->chunk_size is 0. The way that chunk_size is
initialized in padata_do_multithreaded(), chunk_size can be 0 when the
min_chunk in the passed-in padata_mt_job structure is 0.

Fix this divide-by-0 panic by making sure that chunk_size will be at least
1 no matter what the input parameters are.

Affected products

VendorProductAffectedFixed
Linux Linux 5.8 5.10.224

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 6.10.6-1 —
Debian 13 linux 6.10.6-1 —
Debian 12 linux 6.1.106-1 —
Debian 11 linux 5.10.226-1 DLA-3912-1
Debian 11 linux-6.1 6.1.119-1~deb11u1 DLA-4008-1
ReleasePackageFixed inAdvisory
Ubuntu Nvidia-BlueField 22.04 LTS linux-bluefield 5.15.0-1056.58 —
Ubuntu 24.04 LTS linux 6.8.0-50.51 USN-7154-1
Ubuntu 24.04 LTS linux-aws 6.8.0-1020.22 USN-7154-1
Ubuntu 24.04 LTS linux-azure 6.8.0-1020.23 USN-7196-1
Ubuntu 24.04 LTS linux-gcp +1 6.8.0-1019.21 USN-7155-1, USN-7154-1
Ubuntu 24.04 LTS linux-gke 6.8.0-1015.19 USN-7154-1
Ubuntu 24.04 LTS linux-gkeop 6.8.0-1002.4 USN-7156-1
Ubuntu 24.04 LTS linux-ibm 6.8.0-1017.17 USN-7154-1
Ubuntu 24.04 LTS linux-nvidia-lowlatency 6.8.0-1019.21.1 USN-7155-1
Ubuntu 24.04 LTS linux-oem-6.8 6.8.0-1018.18 USN-7154-1
Ubuntu 24.04 LTS linux-oracle +1 6.8.0-1017.18 USN-7154-1
Ubuntu 24.04 LTS linux-raspi 6.8.0-1016.18 USN-7154-1
Ubuntu 24.04 LTS linux-riscv +1 6.8.0-50.51.1 USN-7154-1
Ubuntu 22.04 LTS linux +1 5.15.0-125.135 USN-7100-1
Ubuntu 22.04 LTS linux-aws 5.15.0-1072.78 USN-7100-2
Ubuntu 22.04 LTS linux-aws-6.8 6.8.0-1020.22~22.04.1 USN-7154-1
Ubuntu 22.04 LTS linux-azure 5.15.0-1075.84 USN-7123-1
Ubuntu 22.04 LTS linux-azure-6.8 6.8.0-1020.23~22.04.1 USN-7196-1
Ubuntu 22.04 LTS linux-azure-fde 5.15.0-1076.85.1 —
Ubuntu 22.04 LTS linux-gcp 5.15.0-1071.79 USN-7100-1
Ubuntu 22.04 LTS linux-gcp-6.8 +1 6.8.0-1019.21~22.04.1 USN-7155-1, USN-7154-1
Ubuntu 22.04 LTS linux-gke 5.15.0-1069.75 USN-7100-1
Ubuntu 22.04 LTS linux-gkeop 5.15.0-1055.62 USN-7100-1
Ubuntu 22.04 LTS linux-hwe-6.8 6.8.0-50.51~22.04.1 USN-7154-2
Ubuntu 22.04 LTS linux-ibm +1 5.15.0-1065.68 USN-7100-1
Ubuntu 22.04 LTS linux-ibm-6.8 6.8.0-1017.17~22.04.1 —
Ubuntu 22.04 LTS linux-intel-iotg 5.15.0-1067.73 USN-7144-1
Ubuntu 22.04 LTS linux-kvm 5.15.0-1069.74 USN-7100-1
Ubuntu 22.04 LTS linux-nvidia 5.15.0-1067.68 USN-7100-1
Ubuntu 22.04 LTS linux-nvidia-tegra 5.15.0-1032.32 —
Ubuntu 22.04 LTS linux-nvidia-tegra-igx 5.15.0-1020.20 —
Ubuntu 22.04 LTS linux-oracle 5.15.0-1070.76 USN-7100-1
Ubuntu 22.04 LTS linux-oracle-6.8 6.8.0-1017.18~22.04.1 USN-7154-1
Ubuntu 22.04 LTS linux-riscv +31 No fix yet —
Ubuntu 22.04 LTS linux-riscv-6.8 +1 6.8.0-50.51.1~22.04.1 USN-7154-1
Ubuntu 22.04 LTS linux-xilinx-zynqmp 5.15.0-1038.42 USN-7100-1
Ubuntu 20.04 LTS linux-aws-5.15 5.15.0-1072.78~20.04.1 USN-7100-1
Ubuntu 20.04 LTS linux-azure-5.15 5.15.0-1078.87~20.04.1 USN-7194-1
Ubuntu 20.04 LTS linux-gcp-5.15 5.15.0-1071.79~20.04.1 USN-7100-1
Ubuntu 20.04 LTS linux-gke +26 No fix yet —
Ubuntu 20.04 LTS linux-gkeop-5.15 5.15.0-1055.62~20.04.1 USN-7100-1
Ubuntu 20.04 LTS linux-hwe-5.15 +1 5.15.0-125.135~20.04.1 USN-7100-1
Ubuntu 20.04 LTS linux-ibm-5.15 5.15.0-1065.68~20.04.1 USN-7100-1
Ubuntu 20.04 LTS linux-intel-iotg-5.15 5.15.0-1067.73~20.04.1 USN-7144-1
Ubuntu 20.04 LTS linux-nvidia-tegra-5.15 5.15.0-1032.32~20.04.1 —
Ubuntu 20.04 LTS linux-oracle-5.15 5.15.0-1070.76~20.04.1 USN-7100-1
Ubuntu 20.04 LTS linux-riscv-5.15 5.15.0-1068.72~20.04.1 —
Ubuntu 18.04 LTS linux-gcp +13 No fix yet —
Show 6 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu 16.04 LTS linux-hwe-edge No fix yet —
Ubuntu Pro Realtime 24.04 LTS linux-raspi-realtime 6.8.0-2015.16 —
Ubuntu Pro Realtime 24.04 LTS linux-realtime 6.8.1-1013.14 —
Ubuntu Pro Realtime 22.04 LTS linux-intel-iot-realtime 5.15.0-1066.68 —
Ubuntu Pro Realtime 22.04 LTS linux-realtime 5.15.0-1073.81 —
Ubuntu Pro Realtime 22.04 LTS linux-realtime-6.8 6.8.1-1013.14~22.04.1 —
Ubuntu Pro FIPS-updates 24.04 LTS linux-fips 6.8.0-78.78+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-aws-fips 5.15.0-1072.78+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-azure-fips 5.15.0-1075.84+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-fips 5.15.0-125.135+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-gcp-fips 5.15.0-1071.79+fips1 —
Ubuntu Pro FIPS-preview 22.04 LTS linux-fips +3 No fix yet —
ReleasePackageFixed inAdvisory
RHEL 9 rv +77 5.14.0-570.12.1.el9_6 RHSA-2025:6966
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 7.3.0-427.57.1.el9_4 RHSA-2025:2270
RHEL 9.4 EUS rv +64 5.14.0-427.57.1.el9_4 RHSA-2025:2270

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-64kb +6 6.4.0-150600.23.22.1 SUSE-SU-2024:3383-1
SLES 15 SP6 kernel-azure +2 6.4.0-150600.8.11.1 SUSE-SU-2024:3194-1
SLES 15 SP6 kernel-default-base 6.4.0-150600.23.22.1.150600.12.8.3 SUSE-SU-2024:3383-1
SLES 15 SP5 kernel-64kb +4 5.14.21-150500.55.80.2 SUSE-SU-2024:3483-1
SLES 15 SP5 kernel-azure +2 5.14.21-150500.33.66.1 SUSE-SU-2024:3190-1
SLES 15 SP5 kernel-default-base 5.14.21-150500.55.80.2.150500.6.35.6 SUSE-SU-2024:3483-1
SLES 15 SP5 kernel-syms +1 5.14.21-150500.55.80.1 SUSE-SU-2024:3483-1
Show 6 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLE Micro 6.0 kernel-default-base 6.4.0-17.1.1.51 SUSE-SU-2025:20044-1
SLE Micro 6.0 kernel-livepatch-MICRO-6-0_Update_2 +1 1-1.1 SUSE-SU-2025:20047-1, SUSE-SU-2025:20044-1
SLE Micro 6.0 kernel-rt +1 6.4.0-10.1 SUSE-SU-2025:20047-1
SLE Micro 6.0 kernel-source +2 6.4.0-19.1 SUSE-SU-2025:20044-1
SLE Micro 5.5 kernel-default 5.14.21-150500.55.80.2 SUSE-SU-2024:3483-1
SLE Micro 5.5 kernel-default-base 5.14.21-150500.55.80.2.150500.6.35.6 SUSE-SU-2024:3483-1
SLE Micro 5.5 kernel-rt +1 5.14.21-150500.13.67.3 SUSE-SU-2024:3209-1
SLE Live Patching 15 SP6 kernel-default 6.4.0-150600.23.22.1 SUSE-SU-2024:3383-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6-RT_Update_2 1-150600.1.3.2 SUSE-SU-2024:3195-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6_Update_4 1-150600.13.3.3 SUSE-SU-2024:3383-1
SLE Live Patching 15 SP5 kernel-default 5.14.21-150500.55.80.2 SUSE-SU-2024:3483-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_19 +1 1-150500.11.3.2 SUSE-SU-2024:3483-1, SUSE-SU-2024:3209-1
SUSE Real Time Module 15 SP6 kernel-rt +2 6.4.0-150600.10.8.3 SUSE-SU-2024:3195-1
SUSE Real Time Module 15 SP6 kernel-syms-rt 6.4.0-150600.10.8.1 SUSE-SU-2024:3195-1
SUSE Real Time Module 15 SP5 kernel-rt +2 5.14.21-150500.13.67.3 SUSE-SU-2024:3209-1
SUSE Real Time Module 15 SP5 kernel-syms-rt 5.14.21-150500.13.67.1 SUSE-SU-2024:3209-1
ReleasePackageFixed inAdvisory
openSUSE Leap 15.6 dtb-aarch64 +10 6.4.0-150600.23.22.1 SUSE-SU-2024:3383-1
openSUSE Leap 15.6 kernel-azure +2 6.4.0-150600.8.11.1 SUSE-SU-2024:3194-1
openSUSE Leap 15.6 kernel-default-base 6.4.0-150600.23.22.1.150600.12.8.3 SUSE-SU-2024:3383-1
openSUSE Leap 15.6 kernel-rt +2 6.4.0-150600.10.8.3 SUSE-SU-2024:3195-1
openSUSE Leap 15.6 kernel-syms-rt 6.4.0-150600.10.8.1 SUSE-SU-2024:3195-1
openSUSE Leap 15.5 dtb-aarch64 +3 5.14.21-150500.55.80.1 SUSE-SU-2024:3483-1
openSUSE Leap 15.5 kernel-64kb +6 5.14.21-150500.55.80.2 SUSE-SU-2024:3483-1
openSUSE Leap 15.5 kernel-azure +2 5.14.21-150500.33.66.1 SUSE-SU-2024:3190-1
openSUSE Leap 15.5 kernel-default-base 5.14.21-150500.55.80.2.150500.6.35.6 SUSE-SU-2024:3483-1
openSUSE Leap 15.5 kernel-rt +2 5.14.21-150500.13.67.3 SUSE-SU-2024:3209-1
openSUSE Leap 15.5 kernel-syms-rt 5.14.21-150500.13.67.1 SUSE-SU-2024:3209-1
Show 1 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
openSUSE Leap Micro 5.5 kernel-default 5.14.21-150500.55.80.2 SUSE-SU-2024:3483-1
openSUSE Leap Micro 5.5 kernel-default-base 5.14.21-150500.55.80.2.150500.6.35.6 SUSE-SU-2024:3483-1
openSUSE Leap Micro 5.5 kernel-rt 5.14.21-150500.13.67.3 SUSE-SU-2024:3209-1

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2023 kernel-livepatch-6.1.106-116.188 1.0-0.amzn2023 ALAS2023-2025-864
Amazon Linux 2023 perf +14 6.1.106-116.188.amzn2023 ALAS2023-2025-864

Azure Linux

ReleasePackageFixed inAdvisory
Azure Linux 2 (CBL-Mariner) kernel 5.15.167.1-1 —

Oracle Linux

ReleasePackageFixed inAdvisory
Oracle Linux 9 bpftool 7.5.0-802.el9_6 ELSA-2025-6966
Oracle Linux 9 rv +28 5.14.0-570.12.1.0.1.el9_6 ELSA-2025-6966
Oracle Linux 8 kernel-uek +12 5.15.0-302.167.6.el9uek ELSA-2024-12815
Oracle Linux 8 perf +19 4.18.0-553.27.1.el8_10 ELSA-2024-12815, ELSA-2024-8856

Advisories 39

References