Vulnerability · Published Jul 16, 2024 · Assigned by Linux
CVE-2021-47624net/sunrpc: fix reference count leaks in rpc_sysfs_xprt_state_change
High 7.1
In plain English
A high-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)7.1High
Exploit odds (30 days)0.2%top 85.2% 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: net/sunrpc: fix reference count leaks in rpc_sysfs_xprt_state_change The refcount leak issues take place in an error handling path. When the 3rd argument buf doesn't match with "offline", "online" or "remove", the function simply returns -EINVAL and forgets to decrease the reference count of a rpc_xprt object and a rpc_xprt_switch object increased by rpc_sysfs_xprt_kobj_get_xprt() and rpc_sysfs_xprt_kobj_get_xprt_switch(), causing reference count leaks of both unused objects. Fix this issue by jumping to the error handling path labelled with out_put when buf matches none of "offline", "online" or "remove".
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-rt | 4.18.0-553.16.1.rt7.357.el8_10 | ALSA-2024:5102 |
| AlmaLinux:8 | kernel-rt-core | 4.18.0-553.16.1.rt7.357.el8_10 | ALSA-2024:5102 |
| AlmaLinux:8 | kernel-rt-debug | 4.18.0-553.16.1.rt7.357.el8_10 | ALSA-2024:5102 |
| AlmaLinux:8 | kernel-rt-debug-core | 4.18.0-553.16.1.rt7.357.el8_10 | ALSA-2024:5102 |
| AlmaLinux:8 | kernel-rt-debug-devel | 4.18.0-553.16.1.rt7.357.el8_10 | ALSA-2024:5102 |
| AlmaLinux:8 | kernel-rt-debug-kvm | 4.18.0-553.16.1.rt7.357.el8_10 | ALSA-2024:5102 |
| AlmaLinux:8 | kernel-rt-debug-modules | 4.18.0-553.16.1.rt7.357.el8_10 | ALSA-2024:5102 |
| AlmaLinux:8 | kernel-rt-debug-modules-extra | 4.18.0-553.16.1.rt7.357.el8_10 | ALSA-2024:5102 |
| AlmaLinux:8 | kernel-rt-devel | 4.18.0-553.16.1.rt7.357.el8_10 | ALSA-2024:5102 |
| AlmaLinux:8 | kernel-rt-kvm | 4.18.0-553.16.1.rt7.357.el8_10 | ALSA-2024:5102 |
| AlmaLinux:8 | kernel-rt-modules | 4.18.0-553.16.1.rt7.357.el8_10 | ALSA-2024:5102 |
| AlmaLinux:8 | kernel-rt-modules-extra | 4.18.0-553.16.1.rt7.357.el8_10 | ALSA-2024:5102 |
| 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 | 5.16.10-1 | DEBIAN-CVE-2021-47624 |
| Debian:13 | linux | 5.16.10-1 | DEBIAN-CVE-2021-47624 |
| Debian:14 | linux | 5.16.10-1 | DEBIAN-CVE-2021-47624 |
| 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 |
| Rocky Linux:8 | kernel-rt | 0:4.18.0-553.16.1.rt7.357.el8_10 | RLSA-2024:5102 |
| Ubuntu:22.04:LTS | linux-allwinner-5.19 | no fix listed | UBUNTU-CVE-2021-47624 |
| Ubuntu:22.04:LTS | linux-aws-5.19 | no fix listed | UBUNTU-CVE-2021-47624 |
| Ubuntu:22.04:LTS | linux-aws-6.2 | no fix listed | UBUNTU-CVE-2021-47624 |
| Ubuntu:22.04:LTS | linux-azure-5.19 | no fix listed | UBUNTU-CVE-2021-47624 |
| Ubuntu:22.04:LTS | linux-azure-6.2 | no fix listed | UBUNTU-CVE-2021-47624 |
| Ubuntu:22.04:LTS | linux-azure-fde-5.19 | no fix listed | UBUNTU-CVE-2021-47624 |
| Ubuntu:22.04:LTS | linux-azure-fde-6.2 | no fix listed | UBUNTU-CVE-2021-47624 |
| Ubuntu:22.04:LTS | linux-gcp-5.19 | no fix listed | UBUNTU-CVE-2021-47624 |
| Ubuntu:22.04:LTS | linux-gcp-6.2 | no fix listed | UBUNTU-CVE-2021-47624 |
| Ubuntu:22.04:LTS | linux-hwe-5.19 | no fix listed | UBUNTU-CVE-2021-47624 |
| Ubuntu:22.04:LTS | linux-hwe-6.2 | no fix listed | UBUNTU-CVE-2021-47624 |
| Ubuntu:22.04:LTS | linux-hwe-6.5 | no fix listed | UBUNTU-CVE-2021-47624 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | no fix listed | UBUNTU-CVE-2021-47624 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-5.19 | no fix listed | UBUNTU-CVE-2021-47624 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.2 | no fix listed | UBUNTU-CVE-2021-47624 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.5 | no fix listed | UBUNTU-CVE-2021-47624 |
| Ubuntu:22.04:LTS | linux-nvidia-6.2 | no fix listed | UBUNTU-CVE-2021-47624 |
| Ubuntu:22.04:LTS | linux-oem-5.17 | no fix listed | UBUNTU-CVE-2021-47624 |
| Ubuntu:22.04:LTS | linux-oem-6.0 | no fix listed | UBUNTU-CVE-2021-47624 |
| Ubuntu:22.04:LTS | linux-oem-6.1 | no fix listed | UBUNTU-CVE-2021-47624 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2021-47624 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2021-47624 |
| Ubuntu:22.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2021-47624 |
| Ubuntu:22.04:LTS | linux-riscv-5.19 | no fix listed | UBUNTU-CVE-2021-47624 |
| Ubuntu:22.04:LTS | linux-riscv-6.5 | no fix listed | UBUNTU-CVE-2021-47624 |
| Ubuntu:22.04:LTS | linux-starfive-5.19 | no fix listed | UBUNTU-CVE-2021-47624 |
| Ubuntu:22.04:LTS | linux-starfive-6.2 | no fix listed | UBUNTU-CVE-2021-47624 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | 5b7eb78486cd9ac58bfbd6d84ea0fe2d9fead03b – before 4b22aa42bd4d2d630ef1854c139275c3532937cb5b7eb78486cd9ac58bfbd6d84ea0fe2d9fead03b – before 5f6024c05a2c0fdd180b29395aaf686d25af3a0f5b7eb78486cd9ac58bfbd6d84ea0fe2d9fead03b – before 776d794f28c95051bc70405a7b1fa40115658a18 |
| Linux | Linux | 5.14 |