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vuln-cve/data/2026/46xxx/CVE-2026-46037.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-46037",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2026-05-13T15:03:33.093Z",
"datePublished": "2026-05-27T12:56:47.795Z",
"dateUpdated": "2026-11-10T12:46:59.776Z"
},
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"shortName": "Linux",
"dateUpdated": "2026-08-05T12:29:16.933Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: icmp: validate reply type before using icmp_pointers\n\nExtended echo replies use ICMP_EXT_ECHOREPLY as the outbound reply type.\nThat value is outside the range covered by icmp_pointers[], which only\ndescribes the traditional ICMP types up to NR_ICMP_TYPES.\n\nAvoid consulting icmp_pointers[] for reply types outside that range, and\nuse array_index_nospec() for the remaining in-range lookup. Normal ICMP\nreplies keep their existing behavior unchanged."
}
],
"metrics": [
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"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
"baseScore": 8.2,
"baseSeverity": "HIGH"
},
"scenarios": [
{
"lang": "en",
"value": "AV:N - The vulnerable code is reached by processing an inbound ICMP Extended Echo Request packet in the IPv4 ICMP receive path (icmp_rcv → icmp_echo → icmp_reply → icmp_glue_bits), so any remote host on the network can trigger it.\nAC:L - In the assumed worst-case deployment (RFC 8335 probe responses enabled), a single crafted ICMP Extended Echo Request with the L-bit set deterministically drives the reply type to 43 and triggers the fixed out-of-bounds read; no race or attacker-uncontrollable condition is involved.\nPR:N - Sending an ICMP packet requires no authentication or privileges on the target; the path runs entirely in packet receive before any credential check.\nUI:N - The target only needs to receive the attacker's packet; no victim action is required.\nS:U - The out-of-bounds access stays within the kernel's own memory and security authority, with no crossing of a VM/IOMMU/sandbox boundary.\nC:L - An out-of-bounds read of kernel .rodata occurs, but it is strictly bounded to a fixed 2-byte field at a constant offset and is not disclosed to the attacker, fitting a small bounded read rather than arbitrary disclosure.\nI:N - The bug performs only a read; there is no out-of-bounds write or attacker-meaningful modification of kernel data.\nA:H - The out-of-bounds array access can crash the kernel (e.g., KASAN/panic_on_warn configurations) via a single unauthenticated, repeatable remote packet, yielding a denial of service."
}
]
}
],
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
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],
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"status": "affected",
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{
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"lessThan": "67bf002a2d7387a6312138210d0bd06e3cf4879b",
"status": "affected",
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]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
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"versions": [
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{
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{
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"lessThanOrEqual": "5.15.*",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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},
{
"version": "7.1",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
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}
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"cpeApplicability": [
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"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
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"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.13",
"versionEndExcluding": "5.15.209"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"references": [
{
"url": "https://git.kernel.org/stable/c/b3a88fc5ae024d43c5ecf653f3bbe837e4a6dc99"
},
{
"url": "https://git.kernel.org/stable/c/93df2af4f491de33827550b9d420f01808c0706b"
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{
"url": "https://git.kernel.org/stable/c/92e7c209036dcc0e8ffdf806fdfd3645b263bea5"
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"url": "https://git.kernel.org/stable/c/bc64a66e0b9ad937d3d49934242ee62b01ba9a94"
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{
"url": "https://git.kernel.org/stable/c/c2178ff1c70ebfc2ab9651b230c58a34683db759"
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{
"url": "https://git.kernel.org/stable/c/d700c34a5d186b9ba0715bcb19e0ff80ffbfbfc1"
},
{
"url": "https://git.kernel.org/stable/c/67bf002a2d7387a6312138210d0bd06e3cf4879b"
}
],
"title": "ipv4: icmp: validate reply type before using icmp_pointers",
"x_generator": {
"engine": "bippy-1.2.0"
}
},
"adp": [
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"x_adpType": "supplier",
"providerMetadata": {
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"shortName": "siemens-SADP",
"dateUpdated": "2026-11-10T12:46:59.776Z"
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"metrics": [
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"other": {
"type": "ssvc",
"content": {
"id": "CVE-2026-46037",
"role": "CISA Coordinator",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-10-16T15:19:09.285342Z"
}
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],
"problemTypes": [
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"type": "CWE",
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}
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