Vulnerability · Published Feb 28, 2024 · Assigned by Linux
CVE-2021-47018powerpc/64: Fix the definition of the fixmap area
Medium 5.5
In plain English
A medium-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.2%top 85.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
In the Linux kernel, the following vulnerability has been resolved: powerpc/64: Fix the definition of the fixmap area At the time being, the fixmap area is defined at the top of the address space or just below KASAN. This definition is not valid for PPC64. For PPC64, use the top of the I/O space. Because of circular dependencies, it is not possible to include asm/fixmap.h in asm/book3s/64/pgtable.h , so define a fixed size AREA at the top of the I/O space for fixmap and ensure during build that the size is big enough.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | bpftool | 4.18.0-553.16.1.el8_10 | ALSA-2024:5101 |
| AlmaLinux:8 | kernel | 4.18.0-553.16.1.el8_10 | ALSA-2024:5101 |
| AlmaLinux:8 | kernel-abi-stablelists | 4.18.0-553.16.1.el8_10 | ALSA-2024:5101 |
| AlmaLinux:8 | kernel-core | 4.18.0-553.16.1.el8_10 | ALSA-2024:5101 |
| AlmaLinux:8 | kernel-cross-headers | 4.18.0-553.16.1.el8_10 | ALSA-2024:5101 |
| AlmaLinux:8 | kernel-debug | 4.18.0-553.16.1.el8_10 | ALSA-2024:5101 |
| AlmaLinux:8 | kernel-debug-core | 4.18.0-553.16.1.el8_10 | ALSA-2024:5101 |
| AlmaLinux:8 | kernel-debug-devel | 4.18.0-553.16.1.el8_10 | ALSA-2024:5101 |
| AlmaLinux:8 | kernel-debug-modules | 4.18.0-553.16.1.el8_10 | ALSA-2024:5101 |
| AlmaLinux:8 | kernel-debug-modules-extra | 4.18.0-553.16.1.el8_10 | ALSA-2024:5101 |
| AlmaLinux:8 | kernel-devel | 4.18.0-553.16.1.el8_10 | ALSA-2024:5101 |
| AlmaLinux:8 | kernel-doc | 4.18.0-553.16.1.el8_10 | ALSA-2024:5101 |
| AlmaLinux:8 | kernel-headers | 4.18.0-553.16.1.el8_10 | ALSA-2024:5101 |
| AlmaLinux:8 | kernel-modules | 4.18.0-553.16.1.el8_10 | ALSA-2024:5101 |
| AlmaLinux:8 | kernel-modules-extra | 4.18.0-553.16.1.el8_10 | ALSA-2024:5101 |
| AlmaLinux:8 | kernel-tools | 4.18.0-553.16.1.el8_10 | ALSA-2024:5101 |
| AlmaLinux:8 | kernel-tools-libs | 4.18.0-553.16.1.el8_10 | ALSA-2024:5101 |
| AlmaLinux:8 | kernel-tools-libs-devel | 4.18.0-553.16.1.el8_10 | ALSA-2024:5101 |
| AlmaLinux:8 | kernel-zfcpdump | 4.18.0-553.16.1.el8_10 | ALSA-2024:5101 |
| AlmaLinux:8 | kernel-zfcpdump-core | 4.18.0-553.16.1.el8_10 | ALSA-2024:5101 |
| AlmaLinux:8 | kernel-zfcpdump-devel | 4.18.0-553.16.1.el8_10 | ALSA-2024:5101 |
| AlmaLinux:8 | kernel-zfcpdump-modules | 4.18.0-553.16.1.el8_10 | ALSA-2024:5101 |
| AlmaLinux:8 | kernel-zfcpdump-modules-extra | 4.18.0-553.16.1.el8_10 | ALSA-2024:5101 |
| AlmaLinux:8 | perf | 4.18.0-553.16.1.el8_10 | ALSA-2024:5101 |
| AlmaLinux:8 | python3-perf | 4.18.0-553.16.1.el8_10 | ALSA-2024:5101 |
| Debian:12 | linux | 5.10.38-1 | DEBIAN-CVE-2021-47018 |
| Debian:13 | linux | 5.10.38-1 | DEBIAN-CVE-2021-47018 |
| Debian:14 | linux | 5.10.38-1 | DEBIAN-CVE-2021-47018 |
| Rocky Linux:8 | kernel | 0:4.18.0-553.16.1.el8_10 | RLSA-2024:5101 |
| Rocky Linux:8 | kernel | 0:4.18.0-553.16.1.el8_10.cloud.0.1 | RXSA-2024:5101 |
| Ubuntu:22.04:LTS | linux-allwinner-5.19 | no fix listed | UBUNTU-CVE-2021-47018 |
| Ubuntu:22.04:LTS | linux-aws-5.19 | no fix listed | UBUNTU-CVE-2021-47018 |
| Ubuntu:22.04:LTS | linux-aws-6.2 | no fix listed | UBUNTU-CVE-2021-47018 |
| Ubuntu:22.04:LTS | linux-azure-5.19 | no fix listed | UBUNTU-CVE-2021-47018 |
| Ubuntu:22.04:LTS | linux-azure-6.2 | no fix listed | UBUNTU-CVE-2021-47018 |
| Ubuntu:22.04:LTS | linux-azure-fde-5.19 | no fix listed | UBUNTU-CVE-2021-47018 |
| Ubuntu:22.04:LTS | linux-azure-fde-6.2 | no fix listed | UBUNTU-CVE-2021-47018 |
| Ubuntu:22.04:LTS | linux-gcp-5.19 | no fix listed | UBUNTU-CVE-2021-47018 |
| Ubuntu:22.04:LTS | linux-gcp-6.2 | no fix listed | UBUNTU-CVE-2021-47018 |
| Ubuntu:22.04:LTS | linux-hwe-5.19 | no fix listed | UBUNTU-CVE-2021-47018 |
| Ubuntu:22.04:LTS | linux-hwe-6.2 | no fix listed | UBUNTU-CVE-2021-47018 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-5.19 | no fix listed | UBUNTU-CVE-2021-47018 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.2 | no fix listed | UBUNTU-CVE-2021-47018 |
| Ubuntu:22.04:LTS | linux-nvidia-6.2 | no fix listed | UBUNTU-CVE-2021-47018 |
| Ubuntu:22.04:LTS | linux-oem-5.17 | no fix listed | UBUNTU-CVE-2021-47018 |
| Ubuntu:22.04:LTS | linux-oem-6.0 | no fix listed | UBUNTU-CVE-2021-47018 |
| Ubuntu:22.04:LTS | linux-oem-6.1 | no fix listed | UBUNTU-CVE-2021-47018 |
| Ubuntu:22.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2021-47018 |
| Ubuntu:22.04:LTS | linux-riscv-5.19 | no fix listed | UBUNTU-CVE-2021-47018 |
| Ubuntu:22.04:LTS | linux-starfive-5.19 | no fix listed | UBUNTU-CVE-2021-47018 |
| Ubuntu:22.04:LTS | linux-starfive-6.2 | no fix listed | UBUNTU-CVE-2021-47018 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | 265c3491c4bc8d40587996d6ee2f447a7ccfb4f3 – before 4b9fb2c9039a206d37f215936a4d5bee7b1bf9cd265c3491c4bc8d40587996d6ee2f447a7ccfb4f3 – before abb07dc5e8b61ab7b1dde20dd73aa01a3aeb183f265c3491c4bc8d40587996d6ee2f447a7ccfb4f3 – before a84df7c80bdac598d6ac9268ae578da6928883e8265c3491c4bc8d40587996d6ee2f447a7ccfb4f3 – before 9ccba66d4d2aff9a3909aa77d57ea8b7cc166f3c |
| Linux | Linux | 5.5 |