CVE-2021-21781
Fixed in a distro release EPSS <1%CVSS 4.0
An information disclosure vulnerability exists in the ARM SIGPAGE functionality of Linux Kernel v5.4.66 and v5.4.54. The latest version (5.11-rc4) seems to still be vulnerable. A userland application can read the contents of the sigpage, which can leak kernel memory contents. An attacker can read a process’s memory at a specific offset to trigger this vulnerability. This was fixed in kernel releases: 4.14.222 4.19.177 5.4.99 5.10.17 5.11
Products: linux_kernel, oracle communications_cloud_native_core_binding_support_function, oracle communications_cloud_native_core_network_exposure_function, oracle communications_cloud_native_core_policy
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux 8 | bpftool | 4.18.0-372.9.1.el8 |
| AlmaLinux 8 | kernel | 4.18.0-372.9.1.el8 |
| AlmaLinux 8 | kernel-abi-stablelists | 4.18.0-372.9.1.el8 |
| AlmaLinux 8 | kernel-core | 4.18.0-372.9.1.el8 |
| AlmaLinux 8 | kernel-cross-headers | 4.18.0-372.9.1.el8 |
| AlmaLinux 8 | kernel-debug | 4.18.0-372.9.1.el8 |
| AlmaLinux 8 | kernel-debug-core | 4.18.0-372.9.1.el8 |
| AlmaLinux 8 | kernel-debug-devel | 4.18.0-372.9.1.el8 |
| AlmaLinux 8 | kernel-debug-modules | 4.18.0-372.9.1.el8 |
| AlmaLinux 8 | kernel-debug-modules-extra | 4.18.0-372.9.1.el8 |
| AlmaLinux 8 | kernel-devel | 4.18.0-372.9.1.el8 |
| AlmaLinux 8 | kernel-doc | 4.18.0-372.9.1.el8 |
| AlmaLinux 8 | kernel-headers | 4.18.0-372.9.1.el8 |
| AlmaLinux 8 | kernel-modules | 4.18.0-372.9.1.el8 |
| AlmaLinux 8 | kernel-modules-extra | 4.18.0-372.9.1.el8 |
| AlmaLinux 8 | kernel-tools | 4.18.0-372.9.1.el8 |
| AlmaLinux 8 | kernel-tools-libs | 4.18.0-372.9.1.el8 |
| AlmaLinux 8 | kernel-tools-libs-devel | 4.18.0-372.9.1.el8 |
| AlmaLinux 8 | perf | 4.18.0-372.9.1.el8 |
| AlmaLinux 8 | python3-perf | 4.18.0-372.9.1.el8 |
| Debian 12 | linux | 5.10.19-1 |
| Debian 13 | linux | 5.10.19-1 |
| Debian 14 | linux | 5.10.19-1 |
| Debian 9 | linux | 4.9.272-2 |
| Red Hat Enterprise Linux 8 | bpftool | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | bpftool-debuginfo | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | kernel | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | kernel-abi-stablelists | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | kernel-core | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | kernel-debug | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | kernel-debug-core | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | kernel-debug-debuginfo | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | kernel-debug-devel | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | kernel-debug-modules | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | kernel-debug-modules-extra | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | kernel-debuginfo | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | kernel-debuginfo-common-aarch64 | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | kernel-debuginfo-common-ppc64le | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | kernel-debuginfo-common-s390x | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | kernel-debuginfo-common-x86_64 | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | kernel-devel | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | kernel-doc | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | kernel-modules | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | kernel-modules-extra | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | kernel-tools | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | kernel-tools-debuginfo | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | kernel-tools-libs | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | kernel-tools-libs-devel | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | kernel-zfcpdump | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | kernel-zfcpdump-core | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | kernel-zfcpdump-debuginfo | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | kernel-zfcpdump-devel | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | kernel-zfcpdump-modules | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | kernel-zfcpdump-modules-extra | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | perf | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | perf-debuginfo | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | python3-perf | 0:4.18.0-372.9.1.el8 |
| Red Hat Enterprise Linux 8 | python3-perf-debuginfo | 0:4.18.0-372.9.1.el8 |
| Rocky Linux 8 | kernel | 0:4.18.0-372.9.1.el8 |
| SUSE Linux Enterprise High Availability Extension 15 SP2 | kernel-default | 5.3.18-24.78.1 |
| SUSE Linux Enterprise High Availability Extension 15 SP3 | kernel-default | 5.3.18-59.19.1 |
| SUSE Linux Enterprise Live Patching 15 SP2 | kernel-default | 5.3.18-24.78.1 |
| SUSE Linux Enterprise Live Patching 15 SP2 | kernel-livepatch-SLE15-SP2_Update_18 | 1-5.3.1 |
| SUSE Linux Enterprise Live Patching 15 SP3 | kernel-default | 5.3.18-59.19.1 |
| SUSE Linux Enterprise Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_5 | 1-7.3.1 |
| SUSE Linux Enterprise Micro 5.0 | kernel-default | 5.3.18-24.78.1 |
| SUSE Linux Enterprise Micro 5.0 | kernel-default-base | 5.3.18-24.78.1.9.36.1 |
| SUSE Linux Enterprise Micro 5.0 | kernel-rt | 5.3.18-48.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP2 | kernel-default | 5.3.18-24.78.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP2 | kernel-default-base | 5.3.18-24.78.1.9.36.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP2 | kernel-preempt | 5.3.18-24.78.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP2 | kernel-source | 5.3.18-24.78.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | kernel-64kb | 5.3.18-59.19.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | kernel-default | 5.3.18-59.19.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | kernel-default-base | 5.3.18-59.19.1.18.10.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | kernel-preempt | 5.3.18-59.19.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | kernel-source | 5.3.18-59.19.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | kernel-zfcpdump | 5.3.18-59.19.1 |
| SUSE Linux Enterprise Module for Development Tools 15 SP2 | kernel-docs | 5.3.18-24.78.1 |
| SUSE Linux Enterprise Module for Development Tools 15 SP2 | kernel-obs-build | 5.3.18-24.78.1 |
| SUSE Linux Enterprise Module for Development Tools 15 SP2 | kernel-preempt | 5.3.18-24.78.1 |
| SUSE Linux Enterprise Module for Development Tools 15 SP2 | kernel-source | 5.3.18-24.78.1 |
| SUSE Linux Enterprise Module for Development Tools 15 SP2 | kernel-syms | 5.3.18-24.78.1 |
| SUSE Linux Enterprise Module for Development Tools 15 SP3 | kernel-docs | 5.3.18-59.19.1 |
| SUSE Linux Enterprise Module for Development Tools 15 SP3 | kernel-obs-build | 5.3.18-59.19.1 |
| SUSE Linux Enterprise Module for Development Tools 15 SP3 | kernel-preempt | 5.3.18-59.19.1 |
| SUSE Linux Enterprise Module for Development Tools 15 SP3 | kernel-source | 5.3.18-59.19.1 |
| SUSE Linux Enterprise Module for Development Tools 15 SP3 | kernel-syms | 5.3.18-59.19.1 |
| SUSE Linux Enterprise Module for Legacy 15 SP2 | kernel-default | 5.3.18-24.78.1 |
| SUSE Linux Enterprise Module for Legacy 15 SP3 | kernel-default | 5.3.18-59.19.1 |
| SUSE Linux Enterprise Module for Public Cloud 15 SP2 | kernel-azure | 5.3.18-18.61.1 |
| SUSE Linux Enterprise Module for Public Cloud 15 SP2 | kernel-source-azure | 5.3.18-18.61.1 |
| SUSE Linux Enterprise Module for Public Cloud 15 SP2 | kernel-syms-azure | 5.3.18-18.61.1 |
| SUSE Linux Enterprise Module for Public Cloud 15 SP3 | kernel-azure | 5.3.18-38.17.1 |
| SUSE Linux Enterprise Module for Public Cloud 15 SP3 | kernel-source-azure | 5.3.18-38.17.1 |
| SUSE Linux Enterprise Module for Public Cloud 15 SP3 | kernel-syms-azure | 5.3.18-38.17.1 |
| SUSE Linux Enterprise Workstation Extension 15 SP2 | kernel-default | 5.3.18-24.78.1 |
| SUSE Linux Enterprise Workstation Extension 15 SP2 | kernel-preempt | 5.3.18-24.78.1 |
| SUSE Linux Enterprise Workstation Extension 15 SP3 | kernel-default | 5.3.18-59.19.1 |
| SUSE Linux Enterprise Workstation Extension 15 SP3 | kernel-preempt | 5.3.18-59.19.1 |
| SUSE Real Time Module 15 SP2 | kernel-rt | 5.3.18-48.1 |
| SUSE Real Time Module 15 SP2 | kernel-rt_debug | 5.3.18-48.1 |
| SUSE Real Time Module 15 SP2 | kernel-source-rt | 5.3.18-48.1 |
| SUSE Real Time Module 15 SP2 | kernel-syms-rt | 5.3.18-48.1 |
| Ubuntu 16.04 LTS | linux-hwe-edge | no fix |
| Ubuntu 18.04 LTS | linux | 4.15.0-143.147 |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1102.109 |
| 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 | 5.4.0-1043.45~18.04.1 |
| Ubuntu 18.04 LTS | linux-azure | no fix |
| Ubuntu 18.04 LTS | linux-azure-4.15 | 4.15.0-1114.127 |
| Ubuntu 18.04 LTS | linux-azure-5.3 | no fix |
| Ubuntu 18.04 LTS | linux-azure-5.4 | 5.4.0-1044.46~18.04.1 |
| Ubuntu 18.04 LTS | linux-azure-edge | no fix |
| Ubuntu 18.04 LTS | linux-dell300x | 4.15.0-1018.22 |
| Ubuntu 18.04 LTS | linux-gcp | no fix |
| Ubuntu 18.04 LTS | linux-gcp-4.15 | 4.15.0-1099.112 |
| Ubuntu 18.04 LTS | linux-gcp-5.3 | no fix |
| Ubuntu 18.04 LTS | linux-gcp-5.4 | 5.4.0-1041.44~18.04.1 |
| Ubuntu 18.04 LTS | linux-gcp-edge | no fix |
| Ubuntu 18.04 LTS | linux-gke-4.15 | no fix |
| Ubuntu 18.04 LTS | linux-gke-5.4 | 5.4.0-1040.42~18.04.1 |
| Ubuntu 18.04 LTS | linux-gkeop-5.4 | 5.4.0-1013.14~18.04.1 |
| Ubuntu 18.04 LTS | linux-hwe | no fix |
| Ubuntu 18.04 LTS | linux-hwe-5.4 | 5.4.0-71.79~18.04.1 |
| Ubuntu 18.04 LTS | linux-hwe-edge | no fix |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1091.93 |
| Ubuntu 18.04 LTS | linux-oem | no fix |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1071.79 |
| 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 | 5.4.0-1042.45~18.04.1 |
| Ubuntu 18.04 LTS | linux-raspi-5.4 | 5.4.0-1033.36~18.04.1 |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1085.90 |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1102.111 |
| Ubuntu 20.04 LTS | linux | 5.4.0-71.79 |
| Ubuntu 20.04 LTS | linux-aws | 5.4.0-1043.45 |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1044.46 |
| Ubuntu 20.04 LTS | linux-gcp | 5.4.0-1041.44 |
| Ubuntu 20.04 LTS | linux-gke | 5.4.0-1041.43 |
| Ubuntu 20.04 LTS | linux-gkeop | 5.4.0-1013.14 |
| Ubuntu 20.04 LTS | linux-hwe-5.8 | 5.8.0-53.60~20.04.1 |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1037.38 |
| Ubuntu 20.04 LTS | linux-oem-5.10 | 5.10.0-1017.18 |
| Ubuntu 20.04 LTS | linux-oem-5.6 | no fix |
| Ubuntu 20.04 LTS | linux-oracle | 5.4.0-1042.45 |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1033.36 |
| Ubuntu 20.04 LTS | linux-raspi2 | no fix |
| Ubuntu 20.04 LTS | linux-riscv | no fix |
| Ubuntu 20.04 LTS | linux-riscv-5.8 | 5.8.0-25.27~20.04.1 |
| Ubuntu 22.04 LTS | linux-intel-iot-realtime | no fix |
| Ubuntu 22.04 LTS | linux-realtime | 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 | 4.15.0-1114.127~14.04.1 |
| 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 | 4.15.0-1102.109~16.04.1 |
| Ubuntu Pro 16.04 LTS | linux-azure | 4.15.0-1114.127~16.04.1 |
| Ubuntu Pro 16.04 LTS | linux-gcp | 4.15.0-1099.112~16.04.1 |
| Ubuntu Pro 16.04 LTS | linux-hwe | 4.15.0-143.147~16.04.3 |
| Ubuntu Pro 16.04 LTS | linux-kvm | no fix |
| Ubuntu Pro 16.04 LTS | linux-oracle | 4.15.0-1071.79~16.04.1 |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | no fix |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-aws-fips | 4.15.0-2044.46 |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2026.29 |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips | 4.15.0-1059.67 |
| 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-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-gcp-fips | no fix |
| openSUSE Leap 15.2 | kernel-debug | 5.3.18-lp152.87.1 |
| openSUSE Leap 15.2 | kernel-default | 5.3.18-lp152.87.1 |
| openSUSE Leap 15.2 | kernel-default-base | 5.3.18-lp152.87.1.lp152.8.40.1 |
| openSUSE Leap 15.2 | kernel-docs | 5.3.18-lp152.87.1 |
| openSUSE Leap 15.2 | kernel-kvmsmall | 5.3.18-lp152.87.1 |
| openSUSE Leap 15.2 | kernel-obs-build | 5.3.18-lp152.87.1 |
| openSUSE Leap 15.2 | kernel-obs-qa | 5.3.18-lp152.87.1 |
| openSUSE Leap 15.2 | kernel-preempt | 5.3.18-lp152.87.1 |
| openSUSE Leap 15.2 | kernel-source | 5.3.18-lp152.87.1 |
| openSUSE Leap 15.2 | kernel-syms | 5.3.18-lp152.87.1 |
| openSUSE Leap 15.3 | dtb-aarch64 | 5.3.18-59.19.1 |
| openSUSE Leap 15.3 | kernel-64kb | 5.3.18-59.19.1 |
| openSUSE Leap 15.3 | kernel-azure | 5.3.18-38.17.1 |
| openSUSE Leap 15.3 | kernel-debug | 5.3.18-59.19.1 |
| openSUSE Leap 15.3 | kernel-default | 5.3.18-59.19.1 |
| openSUSE Leap 15.3 | kernel-default-base | 5.3.18-59.19.1.18.10.1 |
| openSUSE Leap 15.3 | kernel-docs | 5.3.18-59.19.1 |
| openSUSE Leap 15.3 | kernel-kvmsmall | 5.3.18-59.19.1 |
| openSUSE Leap 15.3 | kernel-obs-build | 5.3.18-59.19.1 |
| openSUSE Leap 15.3 | kernel-obs-qa | 5.3.18-59.19.1 |
| openSUSE Leap 15.3 | kernel-preempt | 5.3.18-59.19.1 |
| openSUSE Leap 15.3 | kernel-source | 5.3.18-59.19.1 |
| openSUSE Leap 15.3 | kernel-source-azure | 5.3.18-38.17.1 |
| openSUSE Leap 15.3 | kernel-syms | 5.3.18-59.19.1 |
| openSUSE Leap 15.3 | kernel-syms-azure | 5.3.18-38.17.1 |
| openSUSE Leap 15.3 | kernel-zfcpdump | 5.3.18-59.19.1 |