A use-after-free vulnerability was found in the Linux kernel's ext4 filesystem in the way it handled the extra inode size for extended attributes. This flaw could allow a privileged local user to cause a system crash or other undefined behaviors.
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
| Link | Tags |
|---|---|
| https://lore.kernel.org/all/20220616021358.2504451-1-libaokun1%40huawei.com/ | |
| https://github.com/torvalds/linux/commit/67d7d8ad99be | patch |
| https://bugzilla.redhat.com/show_bug.cgi?id=2193097 | third party advisory issue tracking |