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Vulnerability record · CVE-2026-46037 · published 27 May 2026

CVE-2026-46037: Linux kernel vulnerability

Linux · Linux Kernel

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.

8.2 CVSS 3.1 High EPSS 0.63% · top 51.7%
8.2CVSS 3.1 base score
0.63%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
8 Sep 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/67bf002a2d7387a6312138210d0bd06e3cf4879b Patch
https://git.kernel.org/stable/c/92e7c209036dcc0e8ffdf806fdfd3645b263bea5 Patch
https://git.kernel.org/stable/c/93df2af4f491de33827550b9d420f01808c0706b Patch
https://git.kernel.org/stable/c/b3a88fc5ae024d43c5ecf653f3bbe837e4a6dc99 Patch
https://git.kernel.org/stable/c/bc64a66e0b9ad937d3d49934242ee62b01ba9a94 Patch
https://git.kernel.org/stable/c/c2178ff1c70ebfc2ab9651b230c58a34683db759 Patch
https://git.kernel.org/stable/c/d700c34a5d186b9ba0715bcb19e0ff80ffbfbfc1 Patch
https://cert-portal.siemens.com/productcert/html/ssa-019113.html

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Source: NIST National Vulnerability Database (record CVE-2026-46037), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.