CVE-2025-21810
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2025-21810
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-21810.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2025-21810
- Downstream
- Related
- Published
- 2025-02-27T20:01:01Z
- Modified
- 2025-10-10T07:05:29.202604Z
- Summary
- driver core: class: Fix wild pointer dereferences in API class_dev_iter_next()
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
driver core: class: Fix wild pointer dereferences in API classdeviter_next()
There are a potential wild pointer dereferences issue regarding APIs classdeviter_(init|next|exit)(), as explained by below typical usage:
// All members of @iter are wild pointers. struct classdeviter iter;
// classdeviterinit(@iter, @class, ...) checks parameter @class for // potential classtosubsys() 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 classdeviternext(@iter) even if // @iter still contains wild pointers. classdeviter_init(&iter, ...);
// Dereference these wild pointers in @iter here once suffer the error. while (dev = classdeviter_next(&iter)) { ... };
// Also dereference these wild pointers here. classdeviter_exit(&iter);
Actually, all callers of these APIs have such usage pattern in kernel tree. Fix by: - Initialize output parameter @iter by memset() in classdeviterinit() and give callers prompt by prcrit() for the error. - Check if @iter is valid in classdeviter_next().
- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/1614e75d1a1b63db6421c7a4bf37004720c7376c
- https://git.kernel.org/stable/c/5c504e9767b947cf7d4e29b811c0c8b3c53242b7
- https://git.kernel.org/stable/c/e128f82f7006991c99a58114f70ef61e937b1ac1
- https://git.kernel.org/stable/c/f4b9bc823b0cfdebfed479c0e87d6939c7562e87
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced7b884b7f24b42fa25e92ed724ad82f137610afafFixedf4b9bc823b0cfdebfed479c0e87d6939c7562e87
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced7b884b7f24b42fa25e92ed724ad82f137610afafFixed1614e75d1a1b63db6421c7a4bf37004720c7376c
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced7b884b7f24b42fa25e92ed724ad82f137610afafFixed5c504e9767b947cf7d4e29b811c0c8b3c53242b7
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced7b884b7f24b42fa25e92ed724ad82f137610afafFixede128f82f7006991c99a58114f70ef61e937b1ac1