{"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 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