ghsa-3qw8-vgp2-684r
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
arch_topology: Fix incorrect error check in topology_parse_cpu_capacity()
Fix incorrect use of PTR_ERR_OR_ZERO() in topology_parse_cpu_capacity() which causes the code to proceed with NULL clock pointers. The current logic uses !PTR_ERR_OR_ZERO(cpu_clk) which evaluates to true for both valid pointers and NULL, leading to potential NULL pointer dereference in clk_get_rate().
Per include/linux/err.h documentation, PTR_ERR_OR_ZERO(ptr) returns: "The error code within @ptr if it is an error pointer; 0 otherwise."
This means PTR_ERR_OR_ZERO() returns 0 for both valid pointers AND NULL pointers. Therefore !PTR_ERR_OR_ZERO(cpu_clk) evaluates to true (proceed) when cpu_clk is either valid or NULL, causing clk_get_rate(NULL) to be called when of_clk_get() returns NULL.
Replace with !IS_ERR_OR_NULL(cpu_clk) which only proceeds for valid pointers, preventing potential NULL pointer dereference in clk_get_rate().
{
"affected": [],
"aliases": [
"CVE-2025-40346"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-12-16T14:15:46Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\narch_topology: Fix incorrect error check in topology_parse_cpu_capacity()\n\nFix incorrect use of PTR_ERR_OR_ZERO() in topology_parse_cpu_capacity()\nwhich causes the code to proceed with NULL clock pointers. The current\nlogic uses !PTR_ERR_OR_ZERO(cpu_clk) which evaluates to true for both\nvalid pointers and NULL, leading to potential NULL pointer dereference\nin clk_get_rate().\n\nPer include/linux/err.h documentation, PTR_ERR_OR_ZERO(ptr) returns:\n\"The error code within @ptr if it is an error pointer; 0 otherwise.\"\n\nThis means PTR_ERR_OR_ZERO() returns 0 for both valid pointers AND NULL\npointers. Therefore !PTR_ERR_OR_ZERO(cpu_clk) evaluates to true (proceed)\nwhen cpu_clk is either valid or NULL, causing clk_get_rate(NULL) to be\ncalled when of_clk_get() returns NULL.\n\nReplace with !IS_ERR_OR_NULL(cpu_clk) which only proceeds for valid\npointers, preventing potential NULL pointer dereference in clk_get_rate().",
"id": "GHSA-3qw8-vgp2-684r",
"modified": "2025-12-16T15:30:42Z",
"published": "2025-12-16T15:30:42Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40346"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/02fbea0864fd4a863671f5d418129258d7159f68"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2eead19334516c8e9927c11b448fbe512b1f18a1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3373f263bb647fcc3b5237cfaef757633b9ee25e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3a01b2614e84361aa222f67bc628593987e5cdb2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/45379303124487db3a81219af7565d41f498167f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/64da320252e43456cc9ec3055ff567f168467b37"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a77f8434954cb1e9c42c3854e40855fdcf5ab235"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
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