CVE-2021-47259
Fixed in a distro release EPSS <1%CVSS 7.8
In the Linux kernel, the following vulnerability has been resolved: NFS: Fix use-after-free in nfs4_init_client() KASAN reports a use-after-free when attempting to mount two different exports through two different NICs that belong to the same server. Olga was able to hit this with kernels starting somewhere between 5.7 and 5.10, but I traced the patch that introduced the clear_bit() call to 4.13. So something must have changed in the refcounting of the clp pointer to make this call to nfs_put_client() the very last one.
Products: Linux, linux_kernel
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux 2 | kernel | 4.14.238-182.421.amzn2 |
| Amazon Linux 2 | kernel-devel | 4.14.238-182.421.amzn2 |
| Amazon Linux 2 | kernel-headers | 4.14.238-182.421.amzn2 |
| Amazon Linux 2 | kernel-livepatch-4.14.238-182.421 | 1.0-0.amzn2 |
| Amazon Linux 2 | kernel-tools | 4.14.238-182.421.amzn2 |
| Amazon Linux 2 | kernel-tools-devel | 4.14.238-182.421.amzn2 |
| Amazon Linux 2 | perf | 4.14.238-182.421.amzn2 |
| Amazon Linux 2 | python-perf | 4.14.238-182.421.amzn2 |
| Debian 12 | linux | 5.10.46-1 |
| Debian 13 | linux | 5.10.46-1 |
| Debian 14 | linux | 5.10.46-1 |
| 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 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 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 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 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 |
| 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 | 5.4.0-1055.58~18.04.1 |
| 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 | 5.4.0-1056.58~18.04.1 |
| 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 | 5.4.0-1051.55~18.04.1 |
| 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 | 5.4.0-81.91~18.04.1 |
| 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 | 5.4.0-1053.57~18.04.1 |
| Ubuntu 18.04 LTS | linux-raspi-5.4 | 5.4.0-1042.46~18.04.3 |
| Ubuntu 20.04 LTS | linux | 5.4.0-81.91 |
| Ubuntu 20.04 LTS | linux-aws | 5.4.0-1055.58 |
| 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 | 5.4.0-1056.58 |
| 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 | 5.4.0-1051.55 |
| 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 | 5.4.0-1022.23 |
| 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-intel-5.13 | no fix |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1045.47 |
| 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 | 5.4.0-1053.57 |
| 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 | 5.4.0-1042.46 |
| 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-azure | 4.15.0-1123.136~14.04.1 |
| 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-oracle | 4.15.0-1080.88~16.04.1 |
| 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 | 5.4.0-1032.37 |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-gcp-fips | 5.4.0-1067.71~20.04.1 |
| 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 |