CVE-2026-74724

In the Linux kernel, the following vulnerability has been resolved:

ipvs: avoid out-of-bounds write in ip_vs_nat_icmp

Sashiko warns that local attacker can modify the packet

while it is processed by IPVS. Some places read the

IP ihl field multiple times which can cause out-of-bounds

access. One such place is ip_vs_nat_icmp where we

can write after the validated area.

Fix it by providing ciph argument just like it is done for

IPv6 and use ciph->len as offset to the embedded transport

header.

Modify some IPv4 header checks by reading the ihl field

only once.