{"api_version":"1","generated_at":"2026-06-04T00:10:08+00:00","cve":"CVE-2026-46266","urls":{"html":"https://cve.report/CVE-2026-46266","api":"https://cve.report/api/cve/CVE-2026-46266.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-46266","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-46266"},"summary":{"title":"inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ninet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP\n\nYizhou Zhao reported that simply having one RAW socket on protocol\nIPPROTO_RAW (255) was dangerous.\n\n  socket(AF_INET, SOCK_RAW, 255);\n\nA malicious incoming ICMP packet can set the protocol field to 255\nand match this socket, leading to FNHE cache changes.\n\ninner = IP(src=\"192.168.2.1\", dst=\"8.8.8.8\", proto=255)/Raw(\"TEST\")\npkt = IP(src=\"192.168.1.1\", dst=\"192.168.2.1\")/ICMP(type=3, code=4, nexthopmtu=576)/inner\n\n\"man 7 raw\" states:\n\n  A protocol of IPPROTO_RAW implies enabled IP_HDRINCL and is able\n  to send any IP protocol that is specified in the passed header.\n  Receiving of all IP protocols via IPPROTO_RAW is not possible\n  using raw sockets.\n\nMake sure we drop these malicious packets.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-06-03 18:16:28","updated_at":"2026-06-03 18:16:28"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/db76b75ede3810e7cf9cfea5067d4f3e0993768b","name":"https://git.kernel.org/stable/c/db76b75ede3810e7cf9cfea5067d4f3e0993768b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/719d3932b8f6e3348ce2f0ac58e278301fc17575","name":"https://git.kernel.org/stable/c/719d3932b8f6e3348ce2f0ac58e278301fc17575","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/19e42490c89bac9a388f28179e66bebbef350f99","name":"https://git.kernel.org/stable/c/19e42490c89bac9a388f28179e66bebbef350f99","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c89477ad79446867394360b29bb801010fc3ff22","name":"https://git.kernel.org/stable/c/c89477ad79446867394360b29bb801010fc3ff22","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/531c1aec81bfe19d00af13da5531fbb8209e4bd2","name":"https://git.kernel.org/stable/c/531c1aec81bfe19d00af13da5531fbb8209e4bd2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-46266","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46266","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 db76b75ede3810e7cf9cfea5067d4f3e0993768b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 19e42490c89bac9a388f28179e66bebbef350f99 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 531c1aec81bfe19d00af13da5531fbb8209e4bd2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 719d3932b8f6e3348ce2f0ac58e278301fc17575 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 c89477ad79446867394360b29bb801010fc3ff22 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2.6.12","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 2.6.12 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.128 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.75 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.14 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.4 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/ipv4/icmp.c","net/ipv6/icmp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"db76b75ede3810e7cf9cfea5067d4f3e0993768b","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"19e42490c89bac9a388f28179e66bebbef350f99","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"531c1aec81bfe19d00af13da5531fbb8209e4bd2","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"719d3932b8f6e3348ce2f0ac58e278301fc17575","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"c89477ad79446867394360b29bb801010fc3ff22","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/ipv4/icmp.c","net/ipv6/icmp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.12"},{"lessThan":"2.6.12","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.128","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.75","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.14","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.128","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.75","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.14","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.4","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"2.6.12","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ninet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP\n\nYizhou Zhao reported that simply having one RAW socket on protocol\nIPPROTO_RAW (255) was dangerous.\n\n  socket(AF_INET, SOCK_RAW, 255);\n\nA malicious incoming ICMP packet can set the protocol field to 255\nand match this socket, leading to FNHE cache changes.\n\ninner = IP(src=\"192.168.2.1\", dst=\"8.8.8.8\", proto=255)/Raw(\"TEST\")\npkt = IP(src=\"192.168.1.1\", dst=\"192.168.2.1\")/ICMP(type=3, code=4, nexthopmtu=576)/inner\n\n\"man 7 raw\" states:\n\n  A protocol of IPPROTO_RAW implies enabled IP_HDRINCL and is able\n  to send any IP protocol that is specified in the passed header.\n  Receiving of all IP protocols via IPPROTO_RAW is not possible\n  using raw sockets.\n\nMake sure we drop these malicious packets."}],"providerMetadata":{"dateUpdated":"2026-06-03T15:50:07.907Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/db76b75ede3810e7cf9cfea5067d4f3e0993768b"},{"url":"https://git.kernel.org/stable/c/19e42490c89bac9a388f28179e66bebbef350f99"},{"url":"https://git.kernel.org/stable/c/531c1aec81bfe19d00af13da5531fbb8209e4bd2"},{"url":"https://git.kernel.org/stable/c/719d3932b8f6e3348ce2f0ac58e278301fc17575"},{"url":"https://git.kernel.org/stable/c/c89477ad79446867394360b29bb801010fc3ff22"}],"title":"inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-46266","datePublished":"2026-06-03T15:50:07.907Z","dateReserved":"2026-05-13T15:03:33.108Z","dateUpdated":"2026-06-03T15:50:07.907Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-03 18:16:28","lastModifiedDate":"2026-06-03 18:16:28","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"46266","Ordinal":"1","Title":"inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP","CVE":"CVE-2026-46266","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"46266","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ninet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP\n\nYizhou Zhao reported that simply having one RAW socket on protocol\nIPPROTO_RAW (255) was dangerous.\n\n  socket(AF_INET, SOCK_RAW, 255);\n\nA malicious incoming ICMP packet can set the protocol field to 255\nand match this socket, leading to FNHE cache changes.\n\ninner = IP(src=\"192.168.2.1\", dst=\"8.8.8.8\", proto=255)/Raw(\"TEST\")\npkt = IP(src=\"192.168.1.1\", dst=\"192.168.2.1\")/ICMP(type=3, code=4, nexthopmtu=576)/inner\n\n\"man 7 raw\" states:\n\n  A protocol of IPPROTO_RAW implies enabled IP_HDRINCL and is able\n  to send any IP protocol that is specified in the passed header.\n  Receiving of all IP protocols via IPPROTO_RAW is not possible\n  using raw sockets.\n\nMake sure we drop these malicious packets.","Type":"Description","Title":"inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP"}]}}}