CVE-2025-21810 (GCVE-0-2025-21810)
Vulnerability from cvelistv5
Published
2025-02-27 20:01
Modified
2025-05-04 07:21
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
driver core: class: Fix wild pointer dereferences in API class_dev_iter_next()
There are a potential wild pointer dereferences issue regarding APIs
class_dev_iter_(init|next|exit)(), as explained by below typical usage:
// All members of @iter are wild pointers.
struct class_dev_iter iter;
// class_dev_iter_init(@iter, @class, ...) checks parameter @class for
// potential class_to_subsys() error, and it returns void type and does
// not initialize its output parameter @iter, so caller can not detect
// the error and continues to invoke class_dev_iter_next(@iter) even if
// @iter still contains wild pointers.
class_dev_iter_init(&iter, ...);
// Dereference these wild pointers in @iter here once suffer the error.
while (dev = class_dev_iter_next(&iter)) { ... };
// Also dereference these wild pointers here.
class_dev_iter_exit(&iter);
Actually, all callers of these APIs have such usage pattern in kernel tree.
Fix by:
- Initialize output parameter @iter by memset() in class_dev_iter_init()
and give callers prompt by pr_crit() for the error.
- Check if @iter is valid in class_dev_iter_next().
References
Impacted products
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/base/class.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "f4b9bc823b0cfdebfed479c0e87d6939c7562e87",
"status": "affected",
"version": "7b884b7f24b42fa25e92ed724ad82f137610afaf",
"versionType": "git"
},
{
"lessThan": "1614e75d1a1b63db6421c7a4bf37004720c7376c",
"status": "affected",
"version": "7b884b7f24b42fa25e92ed724ad82f137610afaf",
"versionType": "git"
},
{
"lessThan": "5c504e9767b947cf7d4e29b811c0c8b3c53242b7",
"status": "affected",
"version": "7b884b7f24b42fa25e92ed724ad82f137610afaf",
"versionType": "git"
},
{
"lessThan": "e128f82f7006991c99a58114f70ef61e937b1ac1",
"status": "affected",
"version": "7b884b7f24b42fa25e92ed724ad82f137610afaf",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/base/class.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.4"
},
{
"lessThan": "6.4",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.76",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.13",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.13.*",
"status": "unaffected",
"version": "6.13.2",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.14",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.76",
"versionStartIncluding": "6.4",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.13",
"versionStartIncluding": "6.4",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.13.2",
"versionStartIncluding": "6.4",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.14",
"versionStartIncluding": "6.4",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndriver core: class: Fix wild pointer dereferences in API class_dev_iter_next()\n\nThere are a potential wild pointer dereferences issue regarding APIs\nclass_dev_iter_(init|next|exit)(), as explained by below typical usage:\n\n// All members of @iter are wild pointers.\nstruct class_dev_iter iter;\n\n// class_dev_iter_init(@iter, @class, ...) checks parameter @class for\n// potential class_to_subsys() error, and it returns void type and does\n// not initialize its output parameter @iter, so caller can not detect\n// the error and continues to invoke class_dev_iter_next(@iter) even if\n// @iter still contains wild pointers.\nclass_dev_iter_init(\u0026iter, ...);\n\n// Dereference these wild pointers in @iter here once suffer the error.\nwhile (dev = class_dev_iter_next(\u0026iter)) { ... };\n\n// Also dereference these wild pointers here.\nclass_dev_iter_exit(\u0026iter);\n\nActually, all callers of these APIs have such usage pattern in kernel tree.\nFix by:\n- Initialize output parameter @iter by memset() in class_dev_iter_init()\n and give callers prompt by pr_crit() for the error.\n- Check if @iter is valid in class_dev_iter_next()."
}
],
"providerMetadata": {
"dateUpdated": "2025-05-04T07:21:40.730Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/f4b9bc823b0cfdebfed479c0e87d6939c7562e87"
},
{
"url": "https://git.kernel.org/stable/c/1614e75d1a1b63db6421c7a4bf37004720c7376c"
},
{
"url": "https://git.kernel.org/stable/c/5c504e9767b947cf7d4e29b811c0c8b3c53242b7"
},
{
"url": "https://git.kernel.org/stable/c/e128f82f7006991c99a58114f70ef61e937b1ac1"
}
],
"title": "driver core: class: Fix wild pointer dereferences in API class_dev_iter_next()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2025-21810",
"datePublished": "2025-02-27T20:01:01.630Z",
"dateReserved": "2024-12-29T08:45:45.772Z",
"dateUpdated": "2025-05-04T07:21:40.730Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2025-21810\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-02-27T20:16:03.587\",\"lastModified\":\"2025-02-27T20:16:03.587\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndriver core: class: Fix wild pointer dereferences in API class_dev_iter_next()\\n\\nThere are a potential wild pointer dereferences issue regarding APIs\\nclass_dev_iter_(init|next|exit)(), as explained by below typical usage:\\n\\n// All members of @iter are wild pointers.\\nstruct class_dev_iter iter;\\n\\n// class_dev_iter_init(@iter, @class, ...) checks parameter @class for\\n// potential class_to_subsys() error, and it returns void type and does\\n// not initialize its output parameter @iter, so caller can not detect\\n// the error and continues to invoke class_dev_iter_next(@iter) even if\\n// @iter still contains wild pointers.\\nclass_dev_iter_init(\u0026iter, ...);\\n\\n// Dereference these wild pointers in @iter here once suffer the error.\\nwhile (dev = class_dev_iter_next(\u0026iter)) { ... };\\n\\n// Also dereference these wild pointers here.\\nclass_dev_iter_exit(\u0026iter);\\n\\nActually, all callers of these APIs have such usage pattern in kernel tree.\\nFix by:\\n- Initialize output parameter @iter by memset() in class_dev_iter_init()\\n and give callers prompt by pr_crit() for the error.\\n- Check if @iter is valid in class_dev_iter_next().\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1614e75d1a1b63db6421c7a4bf37004720c7376c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5c504e9767b947cf7d4e29b811c0c8b3c53242b7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e128f82f7006991c99a58114f70ef61e937b1ac1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f4b9bc823b0cfdebfed479c0e87d6939c7562e87\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
Loading…
Loading…
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.
- 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.
Loading…