جزئیات آسیب‌پذیری

In the Linux kernel, the following vulnerability has been resolved: net-shapers: don't free reply skb after genlmsg_reply() genlmsg_reply() hands the reply skb to netlink, and netlink_unicast() consumes it on all return paths, whether the skb is queued successfully or freed on an error path. net_shaper_nl_get_doit() and net_shaper_nl_cap_get_doit() currently jump to free_msg after genlmsg_reply() fails and call nlmsg_free(msg), which can hit the same skb twice. Return the genlmsg_reply() error directly and keep free_msg only for pre-reply failures.

• https://git.kernel.org/stable/c/8738dcc844fff7d0157ee775230e95df3b1884d7
• https://git.kernel.org/stable/c/83f7b54242d0abbfce35a55c01322f50962ed3ee
• https://git.kernel.org/stable/c/57885276cc16a2e2b76282c808a4e84cbecb3aae