Linux vulnerability

What happened

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.

Affected versions

Linux: d329ea5bd8845f0b196bf41b18b6173340d6e0e4 through before b3a88fc5ae024d43c5ecf653f3bbe837e4a6dc99 (git); d329ea5bd8845f0b196bf41b18b6173340d6e0e4 through before 93df2af4f491de33827550b9d420f01808c0706b (git); d329ea5bd8845f0b196bf41b18b6173340d6e0e4 through before 92e7c209036dcc0e8ffdf806fdfd3645b263bea5 (git); d329ea5bd8845f0b196bf41b18b6173340d6e0e4 through before bc64a66e0b9ad937d3d49934242ee62b01ba9a94 (git); d329ea5bd8845f0b196bf41b18b6173340d6e0e4 through before c2178ff1c70ebfc2ab9651b230c58a34683db759 (git); d329ea5bd8845f0b196bf41b18b6173340d6e0e4 through before d700c34a5d186b9ba0715bcb19e0ff80ffbfbfc1 (git); d329ea5bd8845f0b196bf41b18b6173340d6e0e4 through before 67bf002a2d7387a6312138210d0bd06e3cf4879b (git); 5.13; V3.1.6 through before * (custom) Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

• Apply vendor-provided updates or mitigations.
• Review affected product exposure and access logs.