جزئیات آسیب‌پذیری

In the Linux kernel, the following vulnerability has been resolved: eventfs: Fix use-after-free in eventfs_remove_rec() eventfs_remove_rec() recursively removes the child at the current loop position. After the recursive call returns, list_for_each_entry() advances by reading list.next from the removed child. If free_ei() drops the final reference, release_ei() reuses the list/rcu union to queue an SRCU callback. The child may be freed before that read. The eventfs_mutex serializes list updates, but it does not keep the removed child alive or prevent the SRCU callback from running. Use list_for_each_entry_safe() to save the next sibling before recursively removing the current child.

• https://git.kernel.org/stable/c/b77581b25e213e83b79ce11eb30024e55ceeb3e9
• https://git.kernel.org/stable/c/f161d7861a0bfdf10af6b738b3b57636204661fb
• https://git.kernel.org/stable/c/5635211b44969f4816e29ec4d5f8665fb39535d0
• https://git.kernel.org/stable/c/74bb1eaf72d185a78c879eb2678ea500f82f46a8
• https://git.kernel.org/stable/c/fd73b691702170d37d66f4b0278530cea8ed419a