CVE-2021-47385

Advisory lineage Upstream: 0 Downstream: 22
Analyzed
Published: 21 May 2024, 15:03
Last modified:11 May 2026, 13:53

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
<0.01% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

21 May 2024, 15:03
Published
Vulnerability first disclosed
11 May 2026, 13:53
Last Modified
Vulnerability information updated

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]

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.01%• Percentile: 1%

Techniques & Countermeasures

  • CWE-476•NULL Pointer Dereference

    The product dereferences a pointer that it expects to be valid but is NULL.

Affected Systems

  • linux•linux

    ≥ f64211151db4269341ee6432ce832ae3756725ad, < 200ced5ba724d8bbf29dfac4ed1e17a39ccaccd1 | ≥ f64211151db4269341ee6432ce832ae3756725ad, < 1499bb2c3a87a2efea0065adab2bd66badee61c3 | ≥ f64211151db4269341ee6432ce832ae3756725ad, < 24af1fe376e22c42238a4a604d31e46c486876c3 | ≥ f64211151db4269341ee6432ce832ae3756725ad, < 0f36b88173f028e372668ae040ab1a496834d278 | 5.4

  • linux•linux_kernel

    < 5.4.151 | ≥ 5.5, < 5.10.71 | ≥ 5.11, < 5.14.10 | 5.15:rc1 | 5.15:rc2 | 5.15:rc3

References (4)