جزئیات آسیب‌پذیری

In the Linux kernel, the following vulnerability has been resolved: vxlan: use pskb_network_may_pull() for transmit path header pulls In vxlan_xmit(), arp_reduce(), and vxlan_mdb_entry_skb_get(), pskb_may_pull() was being called to verify the availability of network layer headers (ARP, IPv6/ND, IP/IPv6 MDB keys). However, during transmit skb->data points to the MAC header, so skb_network_offset(skb) is ETH_HLEN (14 bytes). Using pskb_may_pull(skb, len) only checks len bytes from skb->data rather than skb_network_offset(skb) + len, which can leave part of the network header in non-linear frags. Replace these remaining pskb_may_pull() calls with pskb_network_may_pull() to properly account for the MAC header offset.

• https://git.kernel.org/stable/c/371425d4be7795e9158388af9eee0201e6047410
• https://git.kernel.org/stable/c/bb01c51950c3ff3c76acdd54b85ab38ccc2a8bb4
• https://git.kernel.org/stable/c/6146901881f09ef063eb34ad389f63231f8486f5
• https://git.kernel.org/stable/c/94dee751aad627b3645d424b5d0c736d394573e9
• https://git.kernel.org/stable/c/7076a34b6e33315dc160b4612bfea1c597495585
• https://git.kernel.org/stable/c/b9553558b48db54ac9273e6b98d7263ef5c1a329