Vulnerability · Published May 21, 2024 · Assigned by Linux
CVE-2021-47385hwmon: (w83792d) Fix NULL pointer dereference by removing unnecessary structure field
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 84.6% 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: hwmon: (w83792d) Fix NULL pointer dereference by removing unnecessary structure field If driver read val value sufficient for (val & 0x08) && (!(val & 0x80)) && ((val & 0x7) == ((val >> 4) & 0x7)) from device then Null pointer dereference occurs. (It is possible if tmp = 0b0xyz1xyz, where same literals mean same numbers) Also lm75[] does not serve a purpose anymore after switching to devm_i2c_new_dummy_device() in w83791d_detect_subclients(). The patch fixes possible NULL pointer dereference by removing lm75[]. Found by Linux Driver Verification project (linuxtesting.org). [groeck: Dropped unnecessary continuation lines, fixed multipline alignment]
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | bpftool | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:9 | bpftool | 7.3.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | kernel | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:9 | kernel | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:9 | kernel-64k | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:9 | kernel-64k-core | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:9 | kernel-64k-debug | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:9 | kernel-64k-debug-core | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:9 | kernel-64k-debug-devel | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:9 | kernel-64k-debug-devel-matched | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:9 | kernel-64k-debug-modules | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:9 | kernel-64k-debug-modules-core | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:9 | kernel-64k-debug-modules-extra | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:9 | kernel-64k-devel | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:9 | kernel-64k-devel-matched | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:9 | kernel-64k-modules | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:9 | kernel-64k-modules-core | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:9 | kernel-64k-modules-extra | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | kernel-abi-stablelists | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:9 | kernel-abi-stablelists | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | kernel-core | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:9 | kernel-core | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | kernel-cross-headers | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:9 | kernel-cross-headers | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | kernel-debug | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:9 | kernel-debug | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | kernel-debug-core | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:9 | kernel-debug-core | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | kernel-debug-devel | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:9 | kernel-debug-devel | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:9 | kernel-debug-devel-matched | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | kernel-debug-modules | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:9 | kernel-debug-modules | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:9 | kernel-debug-modules-core | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | kernel-debug-modules-extra | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:9 | kernel-debug-modules-extra | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:9 | kernel-debug-uki-virt | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | kernel-devel | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:9 | kernel-devel | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:9 | kernel-devel-matched | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | kernel-doc | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:9 | kernel-doc | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | kernel-headers | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:9 | kernel-headers | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | kernel-modules | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:9 | kernel-modules | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:9 | kernel-modules-core | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | kernel-modules-extra | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:9 | kernel-modules-extra | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | kernel-rt | 4.18.0-553.22.1.rt7.363.el8_10 | ALSA-2024:7001 |
| AlmaLinux:9 | kernel-rt | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | kernel-rt-core | 4.18.0-553.22.1.rt7.363.el8_10 | ALSA-2024:7001 |
| AlmaLinux:9 | kernel-rt-core | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | kernel-rt-debug | 4.18.0-553.22.1.rt7.363.el8_10 | ALSA-2024:7001 |
| AlmaLinux:9 | kernel-rt-debug | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | kernel-rt-debug-core | 4.18.0-553.22.1.rt7.363.el8_10 | ALSA-2024:7001 |
| AlmaLinux:9 | kernel-rt-debug-core | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | kernel-rt-debug-devel | 4.18.0-553.22.1.rt7.363.el8_10 | ALSA-2024:7001 |
| AlmaLinux:9 | kernel-rt-debug-devel | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| 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:9 | kernel-rt-debug-modules | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:9 | kernel-rt-debug-modules-core | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | kernel-rt-debug-modules-extra | 4.18.0-553.22.1.rt7.363.el8_10 | ALSA-2024:7001 |
| AlmaLinux:9 | kernel-rt-debug-modules-extra | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | kernel-rt-devel | 4.18.0-553.22.1.rt7.363.el8_10 | ALSA-2024:7001 |
| AlmaLinux:9 | kernel-rt-devel | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| 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:9 | kernel-rt-modules | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:9 | kernel-rt-modules-core | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | kernel-rt-modules-extra | 4.18.0-553.22.1.rt7.363.el8_10 | ALSA-2024:7001 |
| AlmaLinux:9 | kernel-rt-modules-extra | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | kernel-tools | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:9 | kernel-tools | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | kernel-tools-libs | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:9 | kernel-tools-libs | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | kernel-tools-libs-devel | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:9 | kernel-tools-libs-devel | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:9 | kernel-uki-virt | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | kernel-zfcpdump | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:9 | kernel-zfcpdump | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | kernel-zfcpdump-core | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:9 | kernel-zfcpdump-core | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | kernel-zfcpdump-devel | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:9 | kernel-zfcpdump-devel | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:9 | kernel-zfcpdump-devel-matched | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | kernel-zfcpdump-modules | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:9 | kernel-zfcpdump-modules | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:9 | kernel-zfcpdump-modules-core | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | kernel-zfcpdump-modules-extra | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:9 | kernel-zfcpdump-modules-extra | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:9 | libperf | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | perf | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:9 | perf | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:8 | python3-perf | 4.18.0-553.22.1.el8_10 | ALSA-2024:7000 |
| AlmaLinux:9 | python3-perf | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:9 | rtla | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| AlmaLinux:9 | rv | 5.14.0-427.40.1.el9_4 | ALSA-2024:8162 |
| Debian:12 | linux | 5.14.12-1 | DEBIAN-CVE-2021-47385 |
| Debian:13 | linux | 5.14.12-1 | DEBIAN-CVE-2021-47385 |
| Debian:14 | linux | 5.14.12-1 | DEBIAN-CVE-2021-47385 |
| Rocky Linux:8 | kernel | 0:4.18.0-553.22.1.el8_10 | RLSA-2024:7000 |
| Rocky Linux:9 | kernel | 0:5.14.0-427.40.1.el9_4 | RLSA-2024:8162 |
| 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-2021-47385 |
| Ubuntu:22.04:LTS | linux-aws-5.19 | no fix listed | UBUNTU-CVE-2021-47385 |
| Ubuntu:22.04:LTS | linux-aws-6.2 | no fix listed | UBUNTU-CVE-2021-47385 |
| Ubuntu:22.04:LTS | linux-azure-5.19 | no fix listed | UBUNTU-CVE-2021-47385 |
| Ubuntu:22.04:LTS | linux-azure-6.2 | no fix listed | UBUNTU-CVE-2021-47385 |
| Ubuntu:22.04:LTS | linux-azure-fde-5.19 | no fix listed | UBUNTU-CVE-2021-47385 |
| Ubuntu:22.04:LTS | linux-azure-fde-6.2 | no fix listed | UBUNTU-CVE-2021-47385 |
| Ubuntu:22.04:LTS | linux-gcp-5.19 | no fix listed | UBUNTU-CVE-2021-47385 |
| Ubuntu:22.04:LTS | linux-gcp-6.2 | no fix listed | UBUNTU-CVE-2021-47385 |
| Ubuntu:22.04:LTS | linux-hwe-5.19 | no fix listed | UBUNTU-CVE-2021-47385 |
| Ubuntu:22.04:LTS | linux-hwe-6.2 | no fix listed | UBUNTU-CVE-2021-47385 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | no fix listed | UBUNTU-CVE-2021-47385 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-5.19 | no fix listed | UBUNTU-CVE-2021-47385 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.2 | no fix listed | UBUNTU-CVE-2021-47385 |
| Ubuntu:22.04:LTS | linux-nvidia-6.2 | no fix listed | UBUNTU-CVE-2021-47385 |
| Ubuntu:22.04:LTS | linux-oem-5.17 | no fix listed | UBUNTU-CVE-2021-47385 |
| Ubuntu:22.04:LTS | linux-oem-6.0 | no fix listed | UBUNTU-CVE-2021-47385 |
| Ubuntu:22.04:LTS | linux-oem-6.1 | no fix listed | UBUNTU-CVE-2021-47385 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2021-47385 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2021-47385 |
| Ubuntu:22.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2021-47385 |
| Ubuntu:22.04:LTS | linux-riscv-5.19 | no fix listed | UBUNTU-CVE-2021-47385 |
| Ubuntu:22.04:LTS | linux-starfive-5.19 | no fix listed | UBUNTU-CVE-2021-47385 |
| Ubuntu:22.04:LTS | linux-starfive-6.2 | no fix listed | UBUNTU-CVE-2021-47385 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | f64211151db4269341ee6432ce832ae3756725ad – before 200ced5ba724d8bbf29dfac4ed1e17a39ccaccd1f64211151db4269341ee6432ce832ae3756725ad – before 1499bb2c3a87a2efea0065adab2bd66badee61c3f64211151db4269341ee6432ce832ae3756725ad – before 24af1fe376e22c42238a4a604d31e46c486876c3f64211151db4269341ee6432ce832ae3756725ad – before 0f36b88173f028e372668ae040ab1a496834d278 |
| Linux | Linux | 5.4 |