CVE-2021-34866
Fixed in a distro release EPSS <1%CVSS 8.8
This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel 5.14-rc3. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handling of eBPF programs. The issue results from the lack of proper validation of user-supplied eBPF programs, which can result in a type confusion condition. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the kernel. Was ZDI-CAN-14689.
Products: 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 |
| Red Hat rhel eus 8.6 | bpftool | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | bpftool-debuginfo | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | kernel | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | kernel-abi-stablelists | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | kernel-core | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | kernel-debug | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | kernel-debug-core | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | kernel-debug-debuginfo | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | kernel-debug-devel | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | kernel-debug-modules | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | kernel-debug-modules-extra | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | kernel-debuginfo | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | kernel-debuginfo-common-aarch64 | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | kernel-debuginfo-common-ppc64le | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | kernel-debuginfo-common-s390x | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | kernel-debuginfo-common-x86_64 | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | kernel-devel | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | kernel-doc | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | kernel-modules | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | kernel-modules-extra | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | kernel-tools | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | kernel-tools-debuginfo | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | kernel-tools-libs | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | kernel-tools-libs-devel | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | kernel-zfcpdump | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | kernel-zfcpdump-core | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | kernel-zfcpdump-debuginfo | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | kernel-zfcpdump-devel | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | kernel-zfcpdump-modules | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | kernel-zfcpdump-modules-extra | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | perf | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | perf-debuginfo | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | python3-perf | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhel eus 8.6 | python3-perf-debuginfo | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhev hypervisor 4.4 | bpftool-debuginfo | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhev hypervisor 4.4 | kernel-debug-debuginfo | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhev hypervisor 4.4 | kernel-debuginfo | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhev hypervisor 4.4 | kernel-debuginfo-common-x86_64 | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhev hypervisor 4.4 | kernel-devel | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhev hypervisor 4.4 | kernel-tools-debuginfo | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhev hypervisor 4.4 | perf | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhev hypervisor 4.4 | perf-debuginfo | 0:4.18.0-372.91.1.el8_6 |
| Red Hat rhev hypervisor 4.4 | python3-perf-debuginfo | 0:4.18.0-372.91.1.el8_6 |
| SUSE Linux Enterprise High Availability Extension 15 SP3 | kernel-default | 5.3.18-59.34.1 |
| SUSE Linux Enterprise Live Patching 15 SP3 | kernel-default | 5.3.18-59.34.1 |
| SUSE Linux Enterprise Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_0 | 8-3.2 |
| SUSE Linux Enterprise Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_1 | 6-2.2 |
| SUSE Linux Enterprise Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_2 | 6-2.2 |
| SUSE Linux Enterprise Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_3 | 6-2.2 |
| SUSE Linux Enterprise Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_4 | 5-2.2 |
| SUSE Linux Enterprise Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_5 | 4-2.2 |
| SUSE Linux Enterprise Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_6 | 2-2.2 |
| SUSE Linux Enterprise Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_9 | 1-7.3.1 |
| SUSE Linux Enterprise Micro 5.1 | kernel-default | 5.3.18-59.34.1 |
| SUSE Linux Enterprise Micro 5.1 | kernel-default-base | 5.3.18-59.34.1.18.21.1 |
| SUSE Linux Enterprise Micro 5.1 | kernel-rt | 5.3.18-60.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | kernel-64kb | 5.3.18-59.34.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | kernel-default | 5.3.18-59.34.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | kernel-default-base | 5.3.18-59.34.1.18.21.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | kernel-preempt | 5.3.18-59.34.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | kernel-source | 5.3.18-59.34.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | kernel-zfcpdump | 5.3.18-59.34.1 |
| SUSE Linux Enterprise Module for Development Tools 15 SP3 | kernel-docs | 5.3.18-59.34.1 |
| SUSE Linux Enterprise Module for Development Tools 15 SP3 | kernel-obs-build | 5.3.18-59.34.1 |
| SUSE Linux Enterprise Module for Development Tools 15 SP3 | kernel-preempt | 5.3.18-59.34.1 |
| SUSE Linux Enterprise Module for Development Tools 15 SP3 | kernel-source | 5.3.18-59.34.1 |
| SUSE Linux Enterprise Module for Development Tools 15 SP3 | kernel-syms | 5.3.18-59.34.1 |
| SUSE Linux Enterprise Module for Legacy 15 SP3 | kernel-default | 5.3.18-59.34.1 |
| SUSE Linux Enterprise Module for Public Cloud 15 SP3 | kernel-azure | 5.3.18-38.28.2 |
| SUSE Linux Enterprise Module for Public Cloud 15 SP3 | kernel-source-azure | 5.3.18-38.28.2 |
| SUSE Linux Enterprise Module for Public Cloud 15 SP3 | kernel-syms-azure | 5.3.18-38.28.1 |
| SUSE Linux Enterprise Workstation Extension 15 SP3 | kernel-default | 5.3.18-59.34.1 |
| SUSE Linux Enterprise Workstation Extension 15 SP3 | kernel-preempt | 5.3.18-59.34.1 |
| SUSE Real Time Module 15 SP3 | kernel-rt | 5.3.18-60.1 |
| SUSE Real Time Module 15 SP3 | kernel-rt_debug | 5.3.18-60.1 |
| SUSE Real Time Module 15 SP3 | kernel-source-rt | 5.3.18-60.1 |
| SUSE Real Time Module 15 SP3 | kernel-syms-rt | 5.3.18-60.1 |
| Ubuntu 16.04 LTS | linux-hwe-edge | no fix |
| 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-azure | no fix |
| Ubuntu 18.04 LTS | linux-azure-5.3 | no fix |
| Ubuntu 18.04 LTS | linux-azure-edge | no fix |
| Ubuntu 18.04 LTS | linux-gcp | no fix |
| Ubuntu 18.04 LTS | linux-gcp-5.3 | no fix |
| Ubuntu 18.04 LTS | linux-gke-4.15 | no fix |
| Ubuntu 18.04 LTS | linux-hwe | no fix |
| Ubuntu 18.04 LTS | linux-hwe-edge | no fix |
| Ubuntu 18.04 LTS | linux-oem | no fix |
| Ubuntu 18.04 LTS | linux-oracle-5.0 | no fix |
| Ubuntu 18.04 LTS | linux-oracle-5.3 | no fix |
| Ubuntu 20.04 LTS | linux-aws-5.11 | 5.11.0-1020.21~20.04.2 |
| Ubuntu 20.04 LTS | linux-aws-5.8 | no fix |
| Ubuntu 20.04 LTS | linux-azure-5.11 | 5.11.0-1020.21~20.04.1 |
| Ubuntu 20.04 LTS | linux-azure-5.8 | no fix |
| Ubuntu 20.04 LTS | linux-gcp-5.11 | 5.11.0-1021.23~20.04.1 |
| Ubuntu 20.04 LTS | linux-gcp-5.8 | no fix |
| Ubuntu 20.04 LTS | linux-hwe-5.11 | 5.11.0-38.42~20.04.1 |
| 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-oem-5.10 | 5.10.0-1050.52 |
| Ubuntu 20.04 LTS | linux-oem-5.13 | 5.13.0-1017.21 |
| Ubuntu 20.04 LTS | linux-oem-5.6 | no fix |
| Ubuntu 20.04 LTS | linux-oracle-5.11 | 5.11.0-1020.21~20.04.1 |
| Ubuntu 20.04 LTS | linux-oracle-5.8 | no fix |
| Ubuntu 20.04 LTS | linux-raspi2 | no fix |
| Ubuntu 20.04 LTS | linux-riscv | no fix |
| Ubuntu 20.04 LTS | linux-riscv-5.11 | 5.11.0-1021.22~20.04.1 |
| Ubuntu 20.04 LTS | linux-riscv-5.8 | no fix |
| openSUSE Leap 15.3 | dtb-aarch64 | 5.3.18-59.34.1 |
| openSUSE Leap 15.3 | kernel-64kb | 5.3.18-59.34.1 |
| openSUSE Leap 15.3 | kernel-azure | 5.3.18-38.28.2 |
| openSUSE Leap 15.3 | kernel-debug | 5.3.18-59.34.1 |
| openSUSE Leap 15.3 | kernel-default | 5.3.18-59.34.1 |
| openSUSE Leap 15.3 | kernel-default-base | 5.3.18-59.34.1.18.21.1 |
| openSUSE Leap 15.3 | kernel-docs | 5.3.18-59.34.1 |
| openSUSE Leap 15.3 | kernel-kvmsmall | 5.3.18-59.34.1 |
| openSUSE Leap 15.3 | kernel-obs-build | 5.3.18-59.34.1 |
| openSUSE Leap 15.3 | kernel-obs-qa | 5.3.18-59.34.1 |
| openSUSE Leap 15.3 | kernel-preempt | 5.3.18-59.34.1 |
| openSUSE Leap 15.3 | kernel-source | 5.3.18-59.34.1 |
| openSUSE Leap 15.3 | kernel-source-azure | 5.3.18-38.28.2 |
| openSUSE Leap 15.3 | kernel-syms | 5.3.18-59.34.1 |
| openSUSE Leap 15.3 | kernel-syms-azure | 5.3.18-38.28.1 |
| openSUSE Leap 15.3 | kernel-zfcpdump | 5.3.18-59.34.1 |