Vulnerability-Lookup

CVE-2025-21810 (GCVE-0-2025-21810)

Vulnerability from cvelistv5 – Published: 2025-02-27 20:01 – Updated: 2026-08-05 11:54

Title

driver core: class: Fix wild pointer dereferences in API class_dev_iter_next()

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().

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/f4b9bc823b0cfdebf…
https://git.kernel.org/stable/c/1614e75d1a1b63db6…
https://git.kernel.org/stable/c/5c504e9767b947cf7…
https://git.kernel.org/stable/c/e128f82f7006991c9…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: 7b884b7f24b42fa25e92ed724ad82f137610afaf , < f4b9bc823b0cfdebfed479c0e87d6939c7562e87 (git) Affected: 7b884b7f24b42fa25e92ed724ad82f137610afaf , < 1614e75d1a1b63db6421c7a4bf37004720c7376c (git) Affected: 7b884b7f24b42fa25e92ed724ad82f137610afaf , < 5c504e9767b947cf7d4e29b811c0c8b3c53242b7 (git) Affected: 7b884b7f24b42fa25e92ed724ad82f137610afaf , < e128f82f7006991c99a58114f70ef61e937b1ac1 (git)	guessed
Linux	Linux	Affected: 6.4 Unaffected: 0 , < 6.4 (semver) Unaffected: 6.6.76 , ≤ 6.6.* (semver) Unaffected: 6.12.13 , ≤ 6.12.* (semver) Unaffected: 6.13.2 , ≤ 6.13.* (semver) Unaffected: 6.14 , ≤ * (original_commit_for_fix)	guessed

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          "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()."
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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            }
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    "datePublished": "2025-02-27T20:01:01.630Z",
    "dateReserved": "2024-12-29T08:45:45.772Z",
    "dateUpdated": "2026-08-05T11:54:37.861Z",
    "state": "PUBLISHED"
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Solucione esto: - Inicialice el par\u00e1metro de salida @iter con memset() en class_dev_iter_init() y d\u00e9 a los que llaman un aviso con pr_crit() para el error. - Verifique si @iter es v\u00e1lido en class_dev_iter_next().\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/base/class.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"7b884b7f24b42fa25e92ed724ad82f137610afaf\",\"lessThan\":\"f4b9bc823b0cfdebfed479c0e87d6939c7562e87\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7b884b7f24b42fa25e92ed724ad82f137610afaf\",\"lessThan\":\"1614e75d1a1b63db6421c7a4bf37004720c7376c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7b884b7f24b42fa25e92ed724ad82f137610afaf\",\"lessThan\":\"5c504e9767b947cf7d4e29b811c0c8b3c53242b7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7b884b7f24b42fa25e92ed724ad82f137610afaf\",\"lessThan\":\"e128f82f7006991c99a58114f70ef61e937b1ac1\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/base/class.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.4\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.4\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.76\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.13\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.13.2\",\"lessThanOrEqual\":\"6.13.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.14\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.4\",\"versionEndExcluding\":\"6.6.76\",\"matchCriteriaId\":\"C6A28F1A-2CCA-4B18-AA73-20D184A7D477\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.13\",\"matchCriteriaId\":\"2897389C-A8C3-4D69-90F2-E701B3D66373\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.13.2\",\"matchCriteriaId\":\"6D4116B1-1BFD-4F23-BA84-169CC05FC5A3\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1614e75d1a1b63db6421c7a4bf37004720c7376c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/5c504e9767b947cf7d4e29b811c0c8b3c53242b7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e128f82f7006991c99a58114f70ef61e937b1ac1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f4b9bc823b0cfdebfed479c0e87d6939c7562e87\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-07-30T10:13:28+00:00",
      "cve": "CVE-2025-21810",
      "id": "CVE-2025-21810",
      "initial_release_date": "2025-02-27T00:00:00+00:00",
      "product_status:known_affected": "226",
      "product_status:known_not_affected": "48",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: driver core: class: Fix wild pointer dereferences in API class_dev_iter_next()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-21810.json",
      "version": "3"
    }
  }
}

WID-SEC-W-2025-1439

Vulnerability from csaf_certbund - Published: 2025-06-30 22:00 - Updated: 2026-03-24 23:00

Summary

Dell Secure Connect Gateway: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff

Severity

Mittel

Scope

304 vulnerabilities in this advisory, including CVE-2025-21810.

CVE-2025-21810

Known affected: 2 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2025-21810 (GCVE-0-2025-21810)

WID-SEC-W-2025-1439

Tags

Sightings

Nomenclature