CVE-2021-47385
Linux kernel: w83792d hwmon NULL Pointer Dereference Vulnerability
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]
INFO
Published Date :
May 21, 2024, 3:15 p.m.
Last Modified :
Dec. 23, 2024, 9:01 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-47385.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-47385 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47385 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Dec. 23, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE NIST CWE-476 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (excluding) 5.4.151 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.71 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.14.10 *cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:* Changed Reference Type https://git.kernel.org/stable/c/0f36b88173f028e372668ae040ab1a496834d278 No Types Assigned https://git.kernel.org/stable/c/0f36b88173f028e372668ae040ab1a496834d278 Patch Changed Reference Type https://git.kernel.org/stable/c/0f36b88173f028e372668ae040ab1a496834d278 No Types Assigned https://git.kernel.org/stable/c/0f36b88173f028e372668ae040ab1a496834d278 Patch Changed Reference Type https://git.kernel.org/stable/c/1499bb2c3a87a2efea0065adab2bd66badee61c3 No Types Assigned https://git.kernel.org/stable/c/1499bb2c3a87a2efea0065adab2bd66badee61c3 Patch Changed Reference Type https://git.kernel.org/stable/c/1499bb2c3a87a2efea0065adab2bd66badee61c3 No Types Assigned https://git.kernel.org/stable/c/1499bb2c3a87a2efea0065adab2bd66badee61c3 Patch Changed Reference Type https://git.kernel.org/stable/c/200ced5ba724d8bbf29dfac4ed1e17a39ccaccd1 No Types Assigned https://git.kernel.org/stable/c/200ced5ba724d8bbf29dfac4ed1e17a39ccaccd1 Patch Changed Reference Type https://git.kernel.org/stable/c/200ced5ba724d8bbf29dfac4ed1e17a39ccaccd1 No Types Assigned https://git.kernel.org/stable/c/200ced5ba724d8bbf29dfac4ed1e17a39ccaccd1 Patch Changed Reference Type https://git.kernel.org/stable/c/24af1fe376e22c42238a4a604d31e46c486876c3 No Types Assigned https://git.kernel.org/stable/c/24af1fe376e22c42238a4a604d31e46c486876c3 Patch Changed Reference Type https://git.kernel.org/stable/c/24af1fe376e22c42238a4a604d31e46c486876c3 No Types Assigned https://git.kernel.org/stable/c/24af1fe376e22c42238a4a604d31e46c486876c3 Patch -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/0f36b88173f028e372668ae040ab1a496834d278 Added Reference https://git.kernel.org/stable/c/1499bb2c3a87a2efea0065adab2bd66badee61c3 Added Reference https://git.kernel.org/stable/c/200ced5ba724d8bbf29dfac4ed1e17a39ccaccd1 Added Reference https://git.kernel.org/stable/c/24af1fe376e22c42238a4a604d31e46c486876c3 -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 28, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 21, 2024
Action Type Old Value New Value Added 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] Added Reference kernel.org https://git.kernel.org/stable/c/200ced5ba724d8bbf29dfac4ed1e17a39ccaccd1 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/1499bb2c3a87a2efea0065adab2bd66badee61c3 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/24af1fe376e22c42238a4a604d31e46c486876c3 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/0f36b88173f028e372668ae040ab1a496834d278 [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-47385 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-47385
weaknesses.