ipv4: icmp: validate reply type before using icmp_pointers

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Summary

CVECVE-2026-46037
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-27 14:17:23 UTC
Updated2026-06-16 15:17:15 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 8.2 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.000700000 probability, percentile 0.214760000 (date 2026-06-04)

Problem Types: NVD-CWE-noinfo

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary8.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
3.1CNADECLARED8.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected d329ea5bd8845f0b196bf41b18b6173340d6e0e4 b3a88fc5ae024d43c5ecf653f3bbe837e4a6dc99 git Not specified
CNA Linux Linux affected d329ea5bd8845f0b196bf41b18b6173340d6e0e4 93df2af4f491de33827550b9d420f01808c0706b git Not specified
CNA Linux Linux affected d329ea5bd8845f0b196bf41b18b6173340d6e0e4 92e7c209036dcc0e8ffdf806fdfd3645b263bea5 git Not specified
CNA Linux Linux affected d329ea5bd8845f0b196bf41b18b6173340d6e0e4 bc64a66e0b9ad937d3d49934242ee62b01ba9a94 git Not specified
CNA Linux Linux affected d329ea5bd8845f0b196bf41b18b6173340d6e0e4 c2178ff1c70ebfc2ab9651b230c58a34683db759 git Not specified
CNA Linux Linux affected d329ea5bd8845f0b196bf41b18b6173340d6e0e4 d700c34a5d186b9ba0715bcb19e0ff80ffbfbfc1 git Not specified
CNA Linux Linux affected d329ea5bd8845f0b196bf41b18b6173340d6e0e4 67bf002a2d7387a6312138210d0bd06e3cf4879b git Not specified
CNA Linux Linux affected 5.13 Not specified
CNA Linux Linux unaffected 5.13 semver Not specified
CNA Linux Linux unaffected 5.15.209 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.175 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.140 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.86 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.27 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.4 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/b3a88fc5ae024d43c5ecf653f3bbe837e4a6dc99 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/c2178ff1c70ebfc2ab9651b230c58a34683db759 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/92e7c209036dcc0e8ffdf806fdfd3645b263bea5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/93df2af4f491de33827550b9d420f01808c0706b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d700c34a5d186b9ba0715bcb19e0ff80ffbfbfc1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/bc64a66e0b9ad937d3d49934242ee62b01ba9a94 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/67bf002a2d7387a6312138210d0bd06e3cf4879b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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