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.
Affected products
linux: linux kernel
References10
- git.kernel.org/stable/c/67bf002a2d7387a6312138210d0bd06e3cf4879b Patch
- git.kernel.org/stable/c/92e7c209036dcc0e8ffdf806fdfd3645b263bea5 Patch
- git.kernel.org/stable/c/93df2af4f491de33827550b9d420f01808c0706b Patch
- git.kernel.org/stable/c/b3a88fc5ae024d43c5ecf653f3bbe837e4a6dc99 Patch
- git.kernel.org/stable/c/bc64a66e0b9ad937d3d49934242ee62b01ba9a94 Patch
- git.kernel.org/stable/c/c2178ff1c70ebfc2ab9651b230c58a34683db759 Patch
- git.kernel.org/stable/c/d700c34a5d186b9ba0715bcb19e0ff80ffbfbfc1 Patch
- cert-portal.siemens.com/productcert/html/ssa-019113.html
- cert-portal.siemens.com/productcert/html/ssa-457936.html
- cert-portal.siemens.com/productcert/html/ssa-784472.html
Metrics
- CVSS 3.1
-
8.2
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H - EPSS — exploit probability
- 1% percentile: 44 · as of 14 November 2026
- CWE
- CWE-125
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.