CVE-2022-49187 (GCVE-0-2022-49187)
Vulnerability from cvelistv5
Published
2025-02-26 01:55
Modified
2025-05-04 08:31
Severity ?
VLAI Severity ?
EPSS score ?
Summary
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.
References
Impacted products
{
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"programFiles": [
"drivers/clk/clk.c"
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{
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"descriptions": [
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nclk: Fix clk_hw_get_clk() when dev is NULL\n\nAny registered clk_core structure can have a NULL pointer in its dev\nfield. While never actually documented, this is evidenced by the wide\nusage of clk_register and clk_hw_register with a NULL device pointer,\nand the fact that the core of_clk_hw_register() function also passes a\nNULL device pointer.\n\nA call to clk_hw_get_clk() on a clk_hw struct whose clk_core is in that\ncase will result in a NULL pointer derefence when it calls dev_name() on\nthat NULL device pointer.\n\nAdd a test for this case and use NULL as the dev_id if the device\npointer is NULL."
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"url": "https://git.kernel.org/stable/c/d183f20cf5a7b546d4108e796b98210ceb317579"
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"url": "https://git.kernel.org/stable/c/23f89fe005b105f0dcc55034c13eb89f9b570fac"
},
{
"url": "https://git.kernel.org/stable/c/0c1b56df451716ba207bbf59f303473643eee4fd"
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"title": "clk: Fix clk_hw_get_clk() when dev is NULL",
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"cveId": "CVE-2022-49187",
"datePublished": "2025-02-26T01:55:36.094Z",
"dateReserved": "2025-02-26T01:49:39.286Z",
"dateUpdated": "2025-05-04T08:31:51.828Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
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}