CVE-2025-40346 (GCVE-0-2025-40346)
Vulnerability from cvelistv5
Published
2025-12-16 13:30
Modified
2025-12-16 13:30
Severity ?
VLAI Severity ?
EPSS score ?
Summary
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().
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: b8fe128dad8f97cc9af7c55a264d1fc5ab677195 Version: b8fe128dad8f97cc9af7c55a264d1fc5ab677195 Version: b8fe128dad8f97cc9af7c55a264d1fc5ab677195 Version: b8fe128dad8f97cc9af7c55a264d1fc5ab677195 Version: b8fe128dad8f97cc9af7c55a264d1fc5ab677195 Version: b8fe128dad8f97cc9af7c55a264d1fc5ab677195 Version: b8fe128dad8f97cc9af7c55a264d1fc5ab677195 |
||
{
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"programFiles": [
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{
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"status": "unaffected",
"version": "5.15.196",
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},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.158",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.6.115",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.12.56",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.17.6",
"versionType": "semver"
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{
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"version": "6.18",
"versionType": "original_commit_for_fix"
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}
],
"cpeApplicability": [
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"negate": false,
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"descriptions": [
{
"lang": "en",
"value": "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()."
}
],
"providerMetadata": {
"dateUpdated": "2025-12-16T13:30:20.395Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/64da320252e43456cc9ec3055ff567f168467b37"
},
{
"url": "https://git.kernel.org/stable/c/02fbea0864fd4a863671f5d418129258d7159f68"
},
{
"url": "https://git.kernel.org/stable/c/a77f8434954cb1e9c42c3854e40855fdcf5ab235"
},
{
"url": "https://git.kernel.org/stable/c/3373f263bb647fcc3b5237cfaef757633b9ee25e"
},
{
"url": "https://git.kernel.org/stable/c/45379303124487db3a81219af7565d41f498167f"
},
{
"url": "https://git.kernel.org/stable/c/3a01b2614e84361aa222f67bc628593987e5cdb2"
},
{
"url": "https://git.kernel.org/stable/c/2eead19334516c8e9927c11b448fbe512b1f18a1"
}
],
"title": "arch_topology: Fix incorrect error check in topology_parse_cpu_capacity()",
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"cveMetadata": {
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"assignerShortName": "Linux",
"cveId": "CVE-2025-40346",
"datePublished": "2025-12-16T13:30:20.395Z",
"dateReserved": "2025-04-16T07:20:57.187Z",
"dateUpdated": "2025-12-16T13:30:20.395Z",
"state": "PUBLISHED"
},
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"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2025-40346\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-16T14:15:46.337\",\"lastModified\":\"2025-12-18T15:08:25.907\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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().\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/02fbea0864fd4a863671f5d418129258d7159f68\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2eead19334516c8e9927c11b448fbe512b1f18a1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3373f263bb647fcc3b5237cfaef757633b9ee25e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3a01b2614e84361aa222f67bc628593987e5cdb2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/45379303124487db3a81219af7565d41f498167f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/64da320252e43456cc9ec3055ff567f168467b37\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a77f8434954cb1e9c42c3854e40855fdcf5ab235\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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