CVE-2022-49187
Linux Kernel clk NULL Pointer Dereference Vulnerability
Description
In the Linux kernel, the following vulnerability has been resolved: clk: Fix clk_hw_get_clk() when dev is NULL Any registered clk_core structure can have a NULL pointer in its dev field. While never actually documented, this is evidenced by the wide usage of clk_register and clk_hw_register with a NULL device pointer, and the fact that the core of_clk_hw_register() function also passes a NULL device pointer. A call to clk_hw_get_clk() on a clk_hw struct whose clk_core is in that case will result in a NULL pointer derefence when it calls dev_name() on that NULL device pointer. Add a test for this case and use NULL as the dev_id if the device pointer is NULL.
INFO
Published Date :
Feb. 26, 2025, 7 a.m.
Last Modified :
March 14, 2025, 8:57 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
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CVE-2022-49187 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2022-49187 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]
Mar. 14, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-476 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 from (excluding) 5.15.33 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.17 from (excluding) 5.17.2 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 from (excluding) 5.16.19 Added Reference Type kernel.org: https://git.kernel.org/stable/c/0c1b56df451716ba207bbf59f303473643eee4fd Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/23f89fe005b105f0dcc55034c13eb89f9b570fac Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/4be3e4c05d8dd1b83b75652cad88c9e752ec7054 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/d183f20cf5a7b546d4108e796b98210ceb317579 Types: Patch -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Feb. 26, 2025
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: clk: Fix clk_hw_get_clk() when dev is NULL Any registered clk_core structure can have a NULL pointer in its dev field. While never actually documented, this is evidenced by the wide usage of clk_register and clk_hw_register with a NULL device pointer, and the fact that the core of_clk_hw_register() function also passes a NULL device pointer. A call to clk_hw_get_clk() on a clk_hw struct whose clk_core is in that case will result in a NULL pointer derefence when it calls dev_name() on that NULL device pointer. Add a test for this case and use NULL as the dev_id if the device pointer is NULL. Added Reference https://git.kernel.org/stable/c/0c1b56df451716ba207bbf59f303473643eee4fd Added Reference https://git.kernel.org/stable/c/23f89fe005b105f0dcc55034c13eb89f9b570fac Added Reference https://git.kernel.org/stable/c/4be3e4c05d8dd1b83b75652cad88c9e752ec7054 Added Reference https://git.kernel.org/stable/c/d183f20cf5a7b546d4108e796b98210ceb317579
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2022-49187 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-2022-49187
weaknesses.