CVE-2021-47324
Fixed in a distro release EPSS 1%CVSS 8.8
In the Linux kernel, the following vulnerability has been resolved: watchdog: Fix possible use-after-free in wdt_startup() This module's remove path calls del_timer(). However, that function does not wait until the timer handler finishes. This means that the timer handler may still be running after the driver's remove function has finished, which would result in a use-after-free. Fix by calling del_timer_sync(), which makes sure the timer handler has finished, and unable to re-schedule itself.
Products: Linux, linux_kernel
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 12 | linux | 5.14.6-1 |
| Debian 13 | linux | 5.14.6-1 |
| Debian 14 | linux | 5.14.6-1 |
| SUSE Enterprise Storage 7.1 | kernel-64kb | 5.3.18-150300.59.164.1 |
| SUSE Enterprise Storage 7.1 | kernel-default | 5.3.18-150300.59.164.1 |
| SUSE Enterprise Storage 7.1 | kernel-default-base | 5.3.18-150300.59.164.1.150300.18.96.1 |
| SUSE Enterprise Storage 7.1 | kernel-docs | 5.3.18-150300.59.164.1 |
| SUSE Enterprise Storage 7.1 | kernel-obs-build | 5.3.18-150300.59.164.1 |
| SUSE Enterprise Storage 7.1 | kernel-preempt | 5.3.18-150300.59.164.1 |
| SUSE Enterprise Storage 7.1 | kernel-source | 5.3.18-150300.59.164.1 |
| SUSE Enterprise Storage 7.1 | kernel-syms | 5.3.18-150300.59.164.1 |
| SUSE Linux Enterprise High Availability Extension 12 SP5 | kernel-default | 4.12.14-122.219.1 |
| SUSE Linux Enterprise High Availability Extension 15 SP2 | kernel-default | 5.3.18-150200.24.194.1 |
| SUSE Linux Enterprise High Availability Extension 15 SP3 | kernel-default | 5.3.18-150300.59.164.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | kernel-default | 5.3.18-150200.24.194.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | kernel-default-base | 5.3.18-150200.24.194.1.150200.9.99.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | kernel-docs | 5.3.18-150200.24.194.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | kernel-obs-build | 5.3.18-150200.24.194.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | kernel-preempt | 5.3.18-150200.24.194.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | kernel-source | 5.3.18-150200.24.194.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | kernel-syms | 5.3.18-150200.24.194.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-64kb | 5.3.18-150300.59.164.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-default | 5.3.18-150300.59.164.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-default-base | 5.3.18-150300.59.164.1.150300.18.96.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-docs | 5.3.18-150300.59.164.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-obs-build | 5.3.18-150300.59.164.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-preempt | 5.3.18-150300.59.164.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-source | 5.3.18-150300.59.164.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | kernel-syms | 5.3.18-150300.59.164.1 |
| SUSE Linux Enterprise Live Patching 12 SP5 | kernel-default | 4.12.14-122.219.1 |
| SUSE Linux Enterprise Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_57 | 1-8.3.1 |
| SUSE Linux Enterprise Live Patching 15 SP2 | kernel-default | 5.3.18-150200.24.194.1 |
| SUSE Linux Enterprise Live Patching 15 SP2 | kernel-livepatch-SLE15-SP2_Update_49 | 1-150200.5.3.1 |
| SUSE Linux Enterprise Live Patching 15 SP3 | kernel-default | 5.3.18-150300.59.164.1 |
| SUSE Linux Enterprise Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_45 | 1-150300.7.3.1 |
| SUSE Linux Enterprise Micro 5.1 | kernel-default | 5.3.18-150300.59.164.1 |
| SUSE Linux Enterprise Micro 5.1 | kernel-default-base | 5.3.18-150300.59.164.1.150300.18.96.1 |
| SUSE Linux Enterprise Micro 5.1 | kernel-rt | 5.3.18-150300.172.1 |
| SUSE Linux Enterprise Micro 5.1 | kernel-source-rt | 5.3.18-150300.172.1 |
| SUSE Linux Enterprise Micro 5.2 | kernel-default | 5.3.18-150300.59.164.1 |
| SUSE Linux Enterprise Micro 5.2 | kernel-default-base | 5.3.18-150300.59.164.1.150300.18.96.1 |
| SUSE Linux Enterprise Micro 5.2 | kernel-rt | 5.3.18-150300.172.1 |
| SUSE Linux Enterprise Micro 5.2 | kernel-source-rt | 5.3.18-150300.172.1 |
| SUSE Linux Enterprise Real Time 12 SP5 | kernel-rt | 4.12.14-10.188.1 |
| SUSE Linux Enterprise Real Time 12 SP5 | kernel-rt_debug | 4.12.14-10.188.1 |
| SUSE Linux Enterprise Real Time 12 SP5 | kernel-source-rt | 4.12.14-10.188.1 |
| SUSE Linux Enterprise Real Time 12 SP5 | kernel-syms-rt | 4.12.14-10.188.1 |
| SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE | kernel-default | 3.0.101-108.156.1 |
| SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE | kernel-ec2 | 3.0.101-108.156.1 |
| SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE | kernel-source | 3.0.101-108.156.1 |
| SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE | kernel-syms | 3.0.101-108.156.1 |
| SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE | kernel-trace | 3.0.101-108.156.1 |
| SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE | kernel-xen | 3.0.101-108.156.1 |
| SUSE Linux Enterprise Server 12 SP5 | kernel-azure | 4.12.14-16.188.1 |
| SUSE Linux Enterprise Server 12 SP5 | kernel-default | 4.12.14-122.219.1 |
| SUSE Linux Enterprise Server 12 SP5 | kernel-source | 4.12.14-122.219.1 |
| SUSE Linux Enterprise Server 12 SP5 | kernel-source-azure | 4.12.14-16.188.1 |
| SUSE Linux Enterprise Server 12 SP5 | kernel-syms | 4.12.14-122.219.1 |
| SUSE Linux Enterprise Server 12 SP5 | kernel-syms-azure | 4.12.14-16.188.1 |
| SUSE Linux Enterprise Server 15 SP2-LTSS | kernel-default | 5.3.18-150200.24.194.1 |
| SUSE Linux Enterprise Server 15 SP2-LTSS | kernel-default-base | 5.3.18-150200.24.194.1.150200.9.99.1 |
| SUSE Linux Enterprise Server 15 SP2-LTSS | kernel-docs | 5.3.18-150200.24.194.1 |
| SUSE Linux Enterprise Server 15 SP2-LTSS | kernel-obs-build | 5.3.18-150200.24.194.1 |
| SUSE Linux Enterprise Server 15 SP2-LTSS | kernel-preempt | 5.3.18-150200.24.194.1 |
| SUSE Linux Enterprise Server 15 SP2-LTSS | kernel-source | 5.3.18-150200.24.194.1 |
| SUSE Linux Enterprise Server 15 SP2-LTSS | kernel-syms | 5.3.18-150200.24.194.1 |
| SUSE Linux Enterprise Server 15 SP3-LTSS | kernel-64kb | 5.3.18-150300.59.164.1 |
| SUSE Linux Enterprise Server 15 SP3-LTSS | kernel-default | 5.3.18-150300.59.164.1 |
| SUSE Linux Enterprise Server 15 SP3-LTSS | kernel-default-base | 5.3.18-150300.59.164.1.150300.18.96.1 |
| SUSE Linux Enterprise Server 15 SP3-LTSS | kernel-docs | 5.3.18-150300.59.164.1 |
| SUSE Linux Enterprise Server 15 SP3-LTSS | kernel-obs-build | 5.3.18-150300.59.164.1 |
| SUSE Linux Enterprise Server 15 SP3-LTSS | kernel-preempt | 5.3.18-150300.59.164.1 |
| SUSE Linux Enterprise Server 15 SP3-LTSS | kernel-source | 5.3.18-150300.59.164.1 |
| SUSE Linux Enterprise Server 15 SP3-LTSS | kernel-syms | 5.3.18-150300.59.164.1 |
| SUSE Linux Enterprise Server 15 SP3-LTSS | kernel-zfcpdump | 5.3.18-150300.59.164.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | kernel-azure | 4.12.14-16.188.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | kernel-default | 4.12.14-122.219.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | kernel-source | 4.12.14-122.219.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | kernel-source-azure | 4.12.14-16.188.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | kernel-syms | 4.12.14-122.219.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | kernel-syms-azure | 4.12.14-16.188.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | kernel-default | 5.3.18-150200.24.194.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | kernel-default-base | 5.3.18-150200.24.194.1.150200.9.99.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | kernel-docs | 5.3.18-150200.24.194.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | kernel-obs-build | 5.3.18-150200.24.194.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | kernel-preempt | 5.3.18-150200.24.194.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | kernel-source | 5.3.18-150200.24.194.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | kernel-syms | 5.3.18-150200.24.194.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | kernel-default | 5.3.18-150300.59.164.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | kernel-default-base | 5.3.18-150300.59.164.1.150300.18.96.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | kernel-docs | 5.3.18-150300.59.164.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | kernel-obs-build | 5.3.18-150300.59.164.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | kernel-preempt | 5.3.18-150300.59.164.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | kernel-source | 5.3.18-150300.59.164.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | kernel-syms | 5.3.18-150300.59.164.1 |
| SUSE Linux Enterprise Software Development Kit 12 SP5 | kernel-docs | 4.12.14-122.219.1 |
| SUSE Linux Enterprise Software Development Kit 12 SP5 | kernel-obs-build | 4.12.14-122.219.1 |
| SUSE Linux Enterprise Workstation Extension 12 SP5 | kernel-default | 4.12.14-122.219.1 |
| Ubuntu 16.04 LTS | linux-hwe-edge | no fix |
| Ubuntu 18.04 LTS | linux | 4.15.0-156.163 |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1111.118 |
| Ubuntu 18.04 LTS | linux-aws-5.0 | no fix |
| Ubuntu 18.04 LTS | linux-aws-5.3 | no fix |
| Ubuntu 18.04 LTS | linux-aws-5.4 | 5.4.0-1057.60~18.04.1 |
| Ubuntu 18.04 LTS | linux-azure | no fix |
| Ubuntu 18.04 LTS | linux-azure-4.15 | 4.15.0-1123.136 |
| Ubuntu 18.04 LTS | linux-azure-5.3 | no fix |
| Ubuntu 18.04 LTS | linux-azure-5.4 | 5.4.0-1059.62~18.04.1 |
| Ubuntu 18.04 LTS | linux-azure-edge | no fix |
| Ubuntu 18.04 LTS | linux-gcp | no fix |
| Ubuntu 18.04 LTS | linux-gcp-4.15 | 4.15.0-1108.122 |
| Ubuntu 18.04 LTS | linux-gcp-5.3 | no fix |
| Ubuntu 18.04 LTS | linux-gcp-5.4 | 5.4.0-1053.57~18.04.1 |
| Ubuntu 18.04 LTS | linux-gke-4.15 | no fix |
| Ubuntu 18.04 LTS | linux-gke-5.4 | no fix |
| Ubuntu 18.04 LTS | linux-gkeop-5.4 | no fix |
| Ubuntu 18.04 LTS | linux-hwe | no fix |
| Ubuntu 18.04 LTS | linux-hwe-5.4 | 5.4.0-87.98~18.04.1 |
| Ubuntu 18.04 LTS | linux-hwe-edge | no fix |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1099.101 |
| Ubuntu 18.04 LTS | linux-oem | no fix |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1080.88 |
| Ubuntu 18.04 LTS | linux-oracle-5.0 | no fix |
| Ubuntu 18.04 LTS | linux-oracle-5.3 | no fix |
| Ubuntu 18.04 LTS | linux-oracle-5.4 | 5.4.0-1055.59~18.04.1 |
| Ubuntu 18.04 LTS | linux-raspi-5.4 | 5.4.0-1044.48~18.04.1 |
| Ubuntu 20.04 LTS | linux | 5.4.0-88.99 |
| Ubuntu 20.04 LTS | linux-aws | 5.4.0-1057.60 |
| Ubuntu 20.04 LTS | linux-aws-5.11 | no fix |
| Ubuntu 20.04 LTS | linux-aws-5.13 | no fix |
| Ubuntu 20.04 LTS | linux-aws-5.8 | no fix |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1059.62 |
| Ubuntu 20.04 LTS | linux-azure-5.11 | no fix |
| Ubuntu 20.04 LTS | linux-azure-5.13 | no fix |
| Ubuntu 20.04 LTS | linux-azure-5.8 | no fix |
| Ubuntu 20.04 LTS | linux-azure-fde | no fix |
| Ubuntu 20.04 LTS | linux-bluefield | 5.4.0-1019.22 |
| Ubuntu 20.04 LTS | linux-gcp | 5.4.0-1053.57 |
| Ubuntu 20.04 LTS | linux-gcp-5.11 | no fix |
| Ubuntu 20.04 LTS | linux-gcp-5.13 | no fix |
| Ubuntu 20.04 LTS | linux-gcp-5.8 | no fix |
| Ubuntu 20.04 LTS | linux-gke | no fix |
| Ubuntu 20.04 LTS | linux-gke-5.15 | no fix |
| Ubuntu 20.04 LTS | linux-gkeop | 5.4.0-1024.25 |
| Ubuntu 20.04 LTS | linux-hwe-5.11 | no fix |
| Ubuntu 20.04 LTS | linux-hwe-5.13 | no fix |
| Ubuntu 20.04 LTS | linux-hwe-5.8 | no fix |
| Ubuntu 20.04 LTS | linux-ibm | 5.4.0-1005.6 |
| Ubuntu 20.04 LTS | linux-intel-5.13 | no fix |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1047.49 |
| Ubuntu 20.04 LTS | linux-oem-5.10 | no fix |
| Ubuntu 20.04 LTS | linux-oem-5.13 | no fix |
| Ubuntu 20.04 LTS | linux-oem-5.14 | no fix |
| Ubuntu 20.04 LTS | linux-oem-5.6 | no fix |
| Ubuntu 20.04 LTS | linux-oracle | 5.4.0-1055.59 |
| Ubuntu 20.04 LTS | linux-oracle-5.11 | no fix |
| Ubuntu 20.04 LTS | linux-oracle-5.13 | no fix |
| Ubuntu 20.04 LTS | linux-oracle-5.8 | no fix |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1044.48 |
| Ubuntu 20.04 LTS | linux-raspi2 | no fix |
| Ubuntu 20.04 LTS | linux-riscv | no fix |
| Ubuntu 20.04 LTS | linux-riscv-5.11 | no fix |
| Ubuntu 20.04 LTS | linux-riscv-5.8 | no fix |
| Ubuntu 22.04 LTS | linux-allwinner-5.19 | no fix |
| Ubuntu 22.04 LTS | linux-aws-5.19 | no fix |
| Ubuntu 22.04 LTS | linux-aws-6.2 | no fix |
| Ubuntu 22.04 LTS | linux-azure-5.19 | no fix |
| Ubuntu 22.04 LTS | linux-azure-6.2 | no fix |
| Ubuntu 22.04 LTS | linux-azure-fde-5.19 | no fix |
| Ubuntu 22.04 LTS | linux-azure-fde-6.2 | no fix |
| Ubuntu 22.04 LTS | linux-gcp-5.19 | no fix |
| Ubuntu 22.04 LTS | linux-gcp-6.2 | no fix |
| Ubuntu 22.04 LTS | linux-hwe-5.19 | no fix |
| Ubuntu 22.04 LTS | linux-hwe-6.2 | no fix |
| Ubuntu 22.04 LTS | linux-intel-iot-realtime | no fix |
| Ubuntu 22.04 LTS | linux-lowlatency-hwe-5.19 | no fix |
| Ubuntu 22.04 LTS | linux-lowlatency-hwe-6.2 | no fix |
| Ubuntu 22.04 LTS | linux-nvidia-6.2 | no fix |
| Ubuntu 22.04 LTS | linux-oem-5.17 | no fix |
| Ubuntu 22.04 LTS | linux-oem-6.0 | no fix |
| Ubuntu 22.04 LTS | linux-oem-6.1 | no fix |
| Ubuntu 22.04 LTS | linux-realtime | no fix |
| Ubuntu 22.04 LTS | linux-riscv | no fix |
| Ubuntu 22.04 LTS | linux-riscv-5.19 | no fix |
| Ubuntu 22.04 LTS | linux-starfive-5.19 | no fix |
| Ubuntu 22.04 LTS | linux-starfive-6.2 | no fix |
| Ubuntu 24.04 LTS | linux-raspi-realtime | no fix |
| Ubuntu Pro 14.04 LTS | linux | no fix |
| Ubuntu Pro 14.04 LTS | linux-aws | no fix |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1123.136~14.04.1 |
| Ubuntu Pro 14.04 LTS | linux-lts-xenial | no fix |
| Ubuntu Pro 16.04 LTS | linux | no fix |
| Ubuntu Pro 16.04 LTS | linux-aws | no fix |
| Ubuntu Pro 16.04 LTS | linux-aws-hwe | 4.15.0-1111.118~16.04.1 |
| Ubuntu Pro 16.04 LTS | linux-azure | 4.15.0-1123.136~16.04.1 |
| Ubuntu Pro 16.04 LTS | linux-gcp | 4.15.0-1108.122~16.04.1 |
| Ubuntu Pro 16.04 LTS | linux-hwe | 4.15.0-156.163~16.04.1 |
| Ubuntu Pro 16.04 LTS | linux-kvm | no fix |
| Ubuntu Pro 16.04 LTS | linux-oracle | 4.15.0-1080.88~16.04.1 |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | no fix |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-aws-fips | 4.15.0-2053.55 |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2035.39 |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips | 4.15.0-1069.78 |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-gcp-fips | 4.15.0-2018.20 |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-aws-fips | 5.4.0-1069.73+fips2 |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-azure-fips | 5.4.0-1073.76+fips1 |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-fips | 5.4.0-1034.40 |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-gcp-fips | 5.4.0-1067.71~20.04.1 |
| Ubuntu Pro FIPS 16.04 LTS | linux-fips | no fix |
| Ubuntu Pro FIPS 18.04 LTS | linux-aws-fips | no fix |
| Ubuntu Pro FIPS 18.04 LTS | linux-azure-fips | no fix |
| Ubuntu Pro FIPS 18.04 LTS | linux-fips | no fix |
| Ubuntu Pro FIPS 18.04 LTS | linux-gcp-fips | no fix |
| Ubuntu Pro FIPS 20.04 LTS | linux-aws-fips | no fix |
| Ubuntu Pro FIPS 20.04 LTS | linux-azure-fips | no fix |
| Ubuntu Pro FIPS 20.04 LTS | linux-fips | no fix |
| Ubuntu Pro FIPS 20.04 LTS | linux-gcp-fips | no fix |