Vulnerability · Published May 24, 2024 · Assigned by Linux
CVE-2021-47560mlxsw: spectrum: Protect driver from buggy firmware
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 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.2%top 87.2% 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: mlxsw: spectrum: Protect driver from buggy firmware When processing port up/down events generated by the device's firmware, the driver protects itself from events reported for non-existent local ports, but not the CPU port (local port 0), which exists, but lacks a netdev. This can result in a NULL pointer dereference when calling netif_carrier_{on,off}(). Fix this by bailing early when processing an event reported for the CPU port. Problem was only observed when running on top of a buggy emulator.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | bpftool | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:8 | kernel | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:8 | kernel-abi-stablelists | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:8 | kernel-core | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:8 | kernel-cross-headers | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:8 | kernel-debug | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:8 | kernel-debug-core | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:8 | kernel-debug-devel | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:8 | kernel-debug-modules | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:8 | kernel-debug-modules-extra | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:8 | kernel-devel | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:8 | kernel-doc | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:8 | kernel-headers | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:8 | kernel-modules | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:8 | kernel-modules-extra | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:8 | kernel-rt | 4.18.0-553.22.1.rt7.363.el8_10 | ALSA-2024:7001 |
| AlmaLinux:8 | kernel-rt-core | 4.18.0-553.22.1.rt7.363.el8_10 | ALSA-2024:7001 |
| AlmaLinux:8 | kernel-rt-debug | 4.18.0-553.22.1.rt7.363.el8_10 | ALSA-2024:7001 |
| AlmaLinux:8 | kernel-rt-debug-core | 4.18.0-553.22.1.rt7.363.el8_10 | ALSA-2024:7001 |
| AlmaLinux:8 | kernel-rt-debug-devel | 4.18.0-553.22.1.rt7.363.el8_10 | ALSA-2024:7001 |
| AlmaLinux:8 | kernel-rt-debug-kvm | 4.18.0-553.22.1.rt7.363.el8_10 | ALSA-2024:7001 |
| AlmaLinux:8 | kernel-rt-debug-modules | 4.18.0-553.22.1.rt7.363.el8_10 | ALSA-2024:7001 |
| AlmaLinux:8 | kernel-rt-debug-modules-extra | 4.18.0-553.22.1.rt7.363.el8_10 | ALSA-2024:7001 |
| AlmaLinux:8 | kernel-rt-devel | 4.18.0-553.22.1.rt7.363.el8_10 | ALSA-2024:7001 |
| AlmaLinux:8 | kernel-rt-kvm | 4.18.0-553.22.1.rt7.363.el8_10 | ALSA-2024:7001 |
| AlmaLinux:8 | kernel-rt-modules | 4.18.0-553.22.1.rt7.363.el8_10 | ALSA-2024:7001 |
| AlmaLinux:8 | kernel-rt-modules-extra | 4.18.0-553.22.1.rt7.363.el8_10 | ALSA-2024:7001 |
| AlmaLinux:8 | kernel-tools | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:8 | kernel-tools-libs | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:8 | kernel-tools-libs-devel | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:8 | kernel-zfcpdump | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:8 | kernel-zfcpdump-core | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:8 | kernel-zfcpdump-devel | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:8 | kernel-zfcpdump-modules | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:8 | kernel-zfcpdump-modules-extra | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:8 | perf | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:8 | python3-perf | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| Debian:12 | linux | 5.15.15-1 | DEBIAN-CVE-2021-47560 |
| Debian:13 | linux | 5.15.15-1 | DEBIAN-CVE-2021-47560 |
| Debian:14 | linux | 5.15.15-1 | DEBIAN-CVE-2021-47560 |
| Rocky Linux:8 | kernel | 0:4.18.0-553.22.1.el8_10 | RLSA-2024:7000 |
| Rocky Linux:8 | kernel-rt | 0:4.18.0-553.22.1.rt7.363.el8_10 | RLSA-2024:7001 |
| Ubuntu:22.04:LTS | linux-allwinner-5.19 | no fix listed | UBUNTU-CVE-2021-47560 |
| Ubuntu:22.04:LTS | linux-aws-5.19 | no fix listed | UBUNTU-CVE-2021-47560 |
| Ubuntu:22.04:LTS | linux-aws-6.2 | no fix listed | UBUNTU-CVE-2021-47560 |
| Ubuntu:22.04:LTS | linux-azure-5.19 | no fix listed | UBUNTU-CVE-2021-47560 |
| Ubuntu:22.04:LTS | linux-azure-6.2 | no fix listed | UBUNTU-CVE-2021-47560 |
| Ubuntu:22.04:LTS | linux-azure-fde-5.19 | no fix listed | UBUNTU-CVE-2021-47560 |
| Ubuntu:22.04:LTS | linux-azure-fde-6.2 | no fix listed | UBUNTU-CVE-2021-47560 |
| Ubuntu:22.04:LTS | linux-gcp-5.19 | no fix listed | UBUNTU-CVE-2021-47560 |
| Ubuntu:22.04:LTS | linux-gcp-6.2 | no fix listed | UBUNTU-CVE-2021-47560 |
| Ubuntu:22.04:LTS | linux-hwe-5.19 | no fix listed | UBUNTU-CVE-2021-47560 |
| Ubuntu:22.04:LTS | linux-hwe-6.2 | no fix listed | UBUNTU-CVE-2021-47560 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | no fix listed | UBUNTU-CVE-2021-47560 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-5.19 | no fix listed | UBUNTU-CVE-2021-47560 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.2 | no fix listed | UBUNTU-CVE-2021-47560 |
| Ubuntu:22.04:LTS | linux-nvidia-6.2 | no fix listed | UBUNTU-CVE-2021-47560 |
| Ubuntu:22.04:LTS | linux-oem-5.17 | no fix listed | UBUNTU-CVE-2021-47560 |
| Ubuntu:22.04:LTS | linux-oem-6.0 | no fix listed | UBUNTU-CVE-2021-47560 |
| Ubuntu:22.04:LTS | linux-oem-6.1 | no fix listed | UBUNTU-CVE-2021-47560 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2021-47560 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2021-47560 |
| Ubuntu:22.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2021-47560 |
| Ubuntu:22.04:LTS | linux-riscv-5.19 | no fix listed | UBUNTU-CVE-2021-47560 |
| Ubuntu:22.04:LTS | linux-starfive-5.19 | no fix listed | UBUNTU-CVE-2021-47560 |
| Ubuntu:22.04:LTS | linux-starfive-6.2 | no fix listed | UBUNTU-CVE-2021-47560 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | 28b1987ef5064dd5c43538ba1168ef7b801f3cad – before 90d0736876c50ecde1a3275636a06b9ddb1cace928b1987ef5064dd5c43538ba1168ef7b801f3cad – before da4d70199e5d82da664a80077508d6c18f5e76df28b1987ef5064dd5c43538ba1168ef7b801f3cad – before 63b08b1f6834bbb0b4f7783bf63b80c8c8e9a047 |
| Linux | Linux | 5.4 |