CVE-2026-46037ipv4: icmp: validate reply type before using icmp_pointers
Updated under an hour ago ()
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It affects Linux and 5 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 8.2 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from d329ea5bd8845f0b196bf41b18b6173340d6e0e4 before b3a88fc5ae024d43c5ecf653f3bbe837e4a6dc99; from d329ea5bd8845f0b196bf41b18b6173340d6e0e4 before 93df2af4f491de33827550b9d420f01808c0706b; from d329ea5bd8845f0b196bf41b18b6173340d6e0e4 before 92e7c209036dcc0e8ffdf806fdfd3645b263bea5; from d329ea5bd8845f0b196bf41b18b6173340d6e0e4 before bc64a66e0b9ad937d3d49934242ee62b01ba9a94; from d329ea5bd8845f0b196bf41b18b6173340d6e0e4 before c2178ff1c70ebfc2ab9651b230c58a34683db759; from d329ea5bd8845f0b196bf41b18b6173340d6e0e4 before d700c34a5d186b9ba0715bcb19e0ff80ffbfbfc1; from d329ea5bd8845f0b196bf41b18b6173340d6e0e4 before 67bf002a2d7387a6312138210d0bd06e3cf4879b | CNA record |
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | all versions | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
linux linux_kernel linux:linux_kernel | from 5.13 before 5.15.209; from 5.16 before 6.1.175; from 6.2 before 6.6.140; from 6.7 before 6.12.86; from 6.13 before 6.18.27; from 6.19 before 7.0.4 | NVD |
References
- https://git.kernel.org/stable/c/b3a88fc5ae024d43c5ecf653f3bbe837e4a6dc99patch
- https://git.kernel.org/stable/c/93df2af4f491de33827550b9d420f01808c0706bpatch
- https://git.kernel.org/stable/c/92e7c209036dcc0e8ffdf806fdfd3645b263bea5patch
- https://git.kernel.org/stable/c/bc64a66e0b9ad937d3d49934242ee62b01ba9a94patch
- https://git.kernel.org/stable/c/c2178ff1c70ebfc2ab9651b230c58a34683db759patch
- https://git.kernel.org/stable/c/d700c34a5d186b9ba0715bcb19e0ff80ffbfbfc1patch
- https://git.kernel.org/stable/c/67bf002a2d7387a6312138210d0bd06e3cf4879bpatch
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.