CVE-2024-50258 Information

Description

In the Linux kernel the following vulnerability has been resolved:

net: fix crash when config small gso_max_size/gso_ipv4_max_size

Config a small gso_max_size/gso_ipv4_max_size will lead to an underflow in sk_dst_gso_max_size() which may trigger a BUG_ON crash because sk->sk_gso_max_size would be much bigger than device limits. Call Trace: tcp_write_xmit tso_segs = tcp_init_tso_segs(skb mss_now); tcp_set_skb_tso_segs tcp_skb_pcount_set // skb->len = 524288 mss_now = 8 // u16 tso_segs = 524288/8 = 65535 -> 0 tso_segs = DIV_ROUND_UP(skb->len mss_now) BUG_ON(!tso_segs) Add check for the minimum value of gso_max_size and gso_ipv4_max_size.

Reference

https://git.kernel.org/stable/c/ac5977001eee7660c643f8e07a2de9001990b7b8 https://git.kernel.org/stable/c/e72fd1389a5364bc6aa6312ecf30bdb5891b9486 https://git.kernel.org/stable/c/9ab5cf19fb0e4680f95e506d6c544259bf1111c4