CVE-2026-46037 Details
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.
A vulnerability exists in the Linux kernel's handling of extended ICMP echo replies. The issue arises because the outbound reply type ICMP_EXT_ECHOREPLY is not within the range covered by the icmp_pointers array, which only includes traditional ICMP types up to NR_ICMP_TYPES. This vulnerability affects the Linux kernel stable tree. The root cause is the improper validation of ICMP reply types before consulting the icmp_pointers array, leading to potential mismanagement of ICMP messages. The vulnerability can be exploited by sending extended echo replies that use ICMP_EXT_ECHOREPLY as the reply type, which is outside the range recognized by the kernel's ICMP handling logic.
Users can upgrade to the patched version of the Linux kernel available in the Linux kernel stable tree to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://cert-portal.siemens.com/productcert/html/ssa-019113.html | siemens-SADP | |
| https://git.kernel.org/stable/c/67bf002a2d7387a6312138210d0bd06e3cf4879b | kernel.org | Patch |
| https://git.kernel.org/stable/c/92e7c209036dcc0e8ffdf806fdfd3645b263bea5 | kernel.org | Patch |
| https://git.kernel.org/stable/c/93df2af4f491de33827550b9d420f01808c0706b | kernel.org | Patch |
| https://git.kernel.org/stable/c/b3a88fc5ae024d43c5ecf653f3bbe837e4a6dc99 | kernel.org | Patch |
| https://git.kernel.org/stable/c/bc64a66e0b9ad937d3d49934242ee62b01ba9a94 | kernel.org | Patch |
| https://git.kernel.org/stable/c/c2178ff1c70ebfc2ab9651b230c58a34683db759 | kernel.org | Patch |
| https://git.kernel.org/stable/c/d700c34a5d186b9ba0715bcb19e0ff80ffbfbfc1 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 5.13, < 5.15.209 >= 5.16, < 6.1.175 >= 6.2, < 6.6.140 >= 6.7, < 6.12.86 >= 6.13, < 6.18.27 >= 6.19, < 7.0.4 |
CPE
Remediation
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Change History
7 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 8, 2026 | CVE Modified | siemens-SADP |
| Sep 8, 2026 | CVE Modified | kernel.org |
| Jun 17, 2026 | CVE Modified | kernel.org |
| Jun 16, 2026 | Initial Analysis | [email protected] |
| Jun 1, 2026 | CVE Modified | kernel.org |
| May 30, 2026 | CVE Modified | kernel.org |
| May 27, 2026 | New CVE Received | kernel.org |