CVE-2026-46037 (GCVE-0-2026-46037)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:56 – Updated: 2026-06-14 17:49
VLAI
Title
ipv4: icmp: validate reply type before using icmp_pointers
Summary
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.
Severity
8.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: d329ea5bd8845f0b196bf41b18b6173340d6e0e4 , < b3a88fc5ae024d43c5ecf653f3bbe837e4a6dc99 (git)
Affected: d329ea5bd8845f0b196bf41b18b6173340d6e0e4 , < 93df2af4f491de33827550b9d420f01808c0706b (git)
Affected: d329ea5bd8845f0b196bf41b18b6173340d6e0e4 , < 92e7c209036dcc0e8ffdf806fdfd3645b263bea5 (git)
Affected: d329ea5bd8845f0b196bf41b18b6173340d6e0e4 , < bc64a66e0b9ad937d3d49934242ee62b01ba9a94 (git)
Affected: d329ea5bd8845f0b196bf41b18b6173340d6e0e4 , < c2178ff1c70ebfc2ab9651b230c58a34683db759 (git)
Affected: d329ea5bd8845f0b196bf41b18b6173340d6e0e4 , < d700c34a5d186b9ba0715bcb19e0ff80ffbfbfc1 (git)
Affected: d329ea5bd8845f0b196bf41b18b6173340d6e0e4 , < 67bf002a2d7387a6312138210d0bd06e3cf4879b (git)
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Linux Linux Affected: 5.13
Unaffected: 0 , < 5.13 (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.140 , ≤ 6.6.* (semver)
Unaffected: 6.12.86 , ≤ 6.12.* (semver)
Unaffected: 6.18.27 , ≤ 6.18.* (semver)
Unaffected: 7.0.4 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-02T21:31:12+00:00",
      "cve": "CVE-2026-46037",
      "id": "CVE-2026-46037",
      "initial_release_date": "2026-05-27T00:00:00+00:00",
      "product_status:fixed": "4",
      "product_status:known_affected": "198",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ipv4: icmp: validate reply type before using icmp_pointers",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46037.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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