{"id":"CVE-2025-21810","revision":"47d4c3ac2f2348fb8ae9adbfe4348877","records":[{"revision":"47d4c3ac2f2348fb8ae9adbfe4348877","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-21810","aliases":[],"title":"driver core: class: Fix wild pointer dereferences in API class_dev_iter_next()","description":"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(&iter, ...);\n\n// Dereference these wild pointers in @iter here once suffer the error.\nwhile (dev = class_dev_iter_next(&iter)) { ... };\n\n// Also dereference these wild pointers here.\nclass_dev_iter_exit(&iter);\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().","state":0,"publishedAt":"2025-02-27T20:01:01.63+00:00","modifiedAt":"2026-10-15T21:51:53.284+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/base/class.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"7b884b7f24b42fa25e92ed724ad82f137610afaf\",\n                            \"lessThan\": \"f4b9bc823b0cfdebfed479c0e87d6939c7562e87\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7b884b7f24b42fa25e92ed724ad82f137610afaf\",\n                            \"lessThan\": \"1614e75d1a1b63db6421c7a4bf37004720c7376c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7b884b7f24b42fa25e92ed724ad82f137610afaf\",\n                            \"lessThan\": \"5c504e9767b947cf7d4e29b811c0c8b3c53242b7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7b884b7f24b42fa25e92ed724ad82f137610afaf\",\n                            \"lessThan\": \"e128f82f7006991c99a58114f70ef61e937b1ac1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/base/class.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.4\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.4\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.76\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.13\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.13.2\",\n                            \"lessThanOrEqual\": \"6.13.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.14\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/f4b9bc823b0cfdebfed479c0e87d6939c7562e87","https://git.kernel.org/stable/c/1614e75d1a1b63db6421c7a4bf37004720c7376c","https://git.kernel.org/stable/c/5c504e9767b947cf7d4e29b811c0c8b3c53242b7","https://git.kernel.org/stable/c/e128f82f7006991c99a58114f70ef61e937b1ac1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-21810","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-21810","identifiers":["CVE-2025-21810"]},"retained":false,"historicalAffected":[]}],"coverage":[]}