CVE-2026-46037

ipv4: icmp: validate reply type before using icmp_pointers

At a glance

Severity
HIGH 8.2
EPSS
EPSS 0.51 % · percentile 43 (2026-10-27)
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Modified

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.

Scores

VersionScoreVectorScored by
CVSS 3.1HIGH 8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:HLinux
CVSS 3.1HIGH 8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)

Weaknesses (CWE)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Linux · Linuxaffected d329ea5bd8845f0b196bf41b18b6173340d6e0e4 < b3a88fc5ae024d43c5ecf653f3bbe837e4a6dc99 ; affected d329ea5bd8845f0b196bf41b18b6173340d6e0e4 < 93df2af4f491de33827550b9d420f01808c0706b ; affected d329ea5bd8845f0b196bf41b18b6173340d6e0e4 < 92e7c209036dcc0e8ffdf806fdfd3645b263bea5 ; affected d329ea5bd8845f0b196bf41b18b6173340d6e0e4 < bc64a66e0b9ad937d3d49934242ee62b01ba9a94 ; affected d329ea5bd8845f0b196bf41b18b6173340d6e0e4 < c2178ff1c70ebfc2ab9651b230c58a34683db759 ; affected d329ea5bd8845f0b196bf41b18b6173340d6e0e4 < d700c34a5d186b9ba0715bcb19e0ff80ffbfbfc1
Linux · Linuxaffected 5.13 ; unaffected 0 < 5.13 ; unaffected 5.15.209 ≤ 5.15.* ; unaffected 6.1.175 ≤ 6.1.* ; unaffected 6.6.140 ≤ 6.6.* ; unaffected 6.12.86 ≤ 6.12.*

References

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD