driver core: class: Fix wild pointer dereferences in API class_dev_iter_next()
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.6.76, 6.12.13, 6.13.2
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: total
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().
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: total
- Record last updated
Affected versions
- Linux Linux
From 7b884b7f24b42fa25e92ed724ad82f137610afaf · fixed in f4b9bc823b0cfdebfed479c0e87d6939c7562e87; From 7b884b7f24b42fa25e92ed724ad82f137610afaf · fixed in 1614e75d1a1b63db6421c7a4bf37004720c7376c; From 7b884b7f24b42fa25e92ed724ad82f137610afaf · fixed in 5c504e9767b947cf7d4e29b811c0c8b3c53242b7; From 7b884b7f24b42fa25e92ed724ad82f137610afaf · fixed in e128f82f7006991c99a58114f70ef61e937b1ac1
- Linux Linux
6.4
- KernelLinux
From 6.4.0 · fixed in 6.6.76; From 6.7.0 · fixed in 6.12.13; From 6.13.0 · fixed in 6.13.2