In the Linux kernel, the following vulnerability has been resolved: fs: sysfs: Fix reference leak in sysfs_break_active_protection() The sysfs_break_active_protection() routine has an obvious reference leak in its error path. If the call to kernfs_find_and_get() fails then kn will be NULL, so the companion sysfs_unbreak_active_protection() routine won’t get called (and would only cause an access violation by trying to dereference kn->parent if it was called). As a result, the reference to kobj acquired at the start of the function will never be released. Fix the leak by adding an explicit kobject_put() call when kn is NULL.
git.kernel.org/linus/a90bca2228c0646fc29a72689d308e5fe03e6d78
git.kernel.org/stable/c/43f00210cb257bcb0387e8caeb4b46375d67f30c
git.kernel.org/stable/c/5d43e072285e81b0b63cee7189b3357c7768a43b
git.kernel.org/stable/c/a4c99b57d43bab45225ba92d574a8683f9edc8e4
git.kernel.org/stable/c/a90bca2228c0646fc29a72689d308e5fe03e6d78
git.kernel.org/stable/c/ac107356aabc362aaeb77463e814fc067a5d3957
ubuntu.com/security/CVE-2024-26993
ubuntu.com/security/notices/USN-6893-1
ubuntu.com/security/notices/USN-6893-2
ubuntu.com/security/notices/USN-6893-3
ubuntu.com/security/notices/USN-6896-1
ubuntu.com/security/notices/USN-6896-2
ubuntu.com/security/notices/USN-6896-3
ubuntu.com/security/notices/USN-6896-4
ubuntu.com/security/notices/USN-6896-5
ubuntu.com/security/notices/USN-6898-1
ubuntu.com/security/notices/USN-6898-2
ubuntu.com/security/notices/USN-6898-3
ubuntu.com/security/notices/USN-6898-4
ubuntu.com/security/notices/USN-6917-1
ubuntu.com/security/notices/USN-6918-1
ubuntu.com/security/notices/USN-6919-1
ubuntu.com/security/notices/USN-6927-1
www.cve.org/CVERecord?id=CVE-2024-26993