CVE-2026-46037

Description

In the Linux kernel, the following vulnerability has been resolved: ipv4: icmp: validate reply type before using icmp_pointers Extended echo replies use ICMP_EXT_ECHOREPLY as the outbound reply type. That value is outside the range covered by icmp_pointers[], which only describes the traditional ICMP types up to NR_ICMP_TYPES. Avoid consulting icmp_pointers[] for reply types outside that range, and use array_index_nospec() for the remaining in-range lookup. Normal ICMP replies keep their existing behavior unchanged.

References

• https://git.kernel.org/stable/c/67bf002a2d7387a6312138210d0bd06e3cf4879b
• https://git.kernel.org/stable/c/92e7c209036dcc0e8ffdf806fdfd3645b263bea5
• https://git.kernel.org/stable/c/bc64a66e0b9ad937d3d49934242ee62b01ba9a94
• https://git.kernel.org/stable/c/c2178ff1c70ebfc2ab9651b230c58a34683db759
• https://git.kernel.org/stable/c/d700c34a5d186b9ba0715bcb19e0ff80ffbfbfc1