{ "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": "2026-10-19T19:26:41.864Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "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": [ { "cvssV3_1": { "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." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/ipv4/icmp.c" ], "versions": [ { "version": "d329ea5bd8845f0b196bf41b18b6173340d6e0e4", "lessThan": "b3a88fc5ae024d43c5ecf653f3bbe837e4a6dc99", "status": "affected", "versionType": "git" }, { "version": "d329ea5bd8845f0b196bf41b18b6173340d6e0e4", "lessThan": "93df2af4f491de33827550b9d420f01808c0706b", "status": "affected", "versionType": "git" }, { "version": "d329ea5bd8845f0b196bf41b18b6173340d6e0e4", "lessThan": "92e7c209036dcc0e8ffdf806fdfd3645b263bea5", "status": "affected", "versionType": "git" }, { "version": "d329ea5bd8845f0b196bf41b18b6173340d6e0e4", "lessThan": "bc64a66e0b9ad937d3d49934242ee62b01ba9a94", "status": "affected", "versionType": "git" }, { "version": "d329ea5bd8845f0b196bf41b18b6173340d6e0e4", "lessThan": "c2178ff1c70ebfc2ab9651b230c58a34683db759", "status": "affected", "versionType": "git" }, { "version": "d329ea5bd8845f0b196bf41b18b6173340d6e0e4", "lessThan": "d700c34a5d186b9ba0715bcb19e0ff80ffbfbfc1", "status": "affected", "versionType": "git" }, { "version": "d329ea5bd8845f0b196bf41b18b6173340d6e0e4", "lessThan": "67bf002a2d7387a6312138210d0bd06e3cf4879b", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/ipv4/icmp.c" ], "versions": [ { "version": "5.13", "status": "affected" }, { "version": "0", "lessThan": "5.13", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.140", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.86", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.27", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0.4", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "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:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.1.175" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.6.140" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.12.86" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.18.27" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "7.0.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "7.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/b3a88fc5ae024d43c5ecf653f3bbe837e4a6dc99" }, { "url": "https://git.kernel.org/stable/c/93df2af4f491de33827550b9d420f01808c0706b" }, { "url": "https://git.kernel.org/stable/c/92e7c209036dcc0e8ffdf806fdfd3645b263bea5" }, { "url": "https://git.kernel.org/stable/c/bc64a66e0b9ad937d3d49934242ee62b01ba9a94" }, { "url": "https://git.kernel.org/stable/c/c2178ff1c70ebfc2ab9651b230c58a34683db759" }, { "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": [ { "x_adpType": "supplier", "providerMetadata": { "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "shortName": "siemens-SADP", "dateUpdated": "2026-10-15T01:20:06.254Z" }, "affected": [ { "vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP", "versions": [ { "status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP", "versions": [ { "status": "affected", "version": "V3.1.7", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP", "versions": [ { "status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP", "versions": [ { "status": "affected", 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