{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-46266", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.108Z", "datePublished": "2026-06-03T15:50:07.907Z", "dateUpdated": "2026-06-03T15:50:07.907Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-03T15:50:07.907Z"}, "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."}], "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", "net/ipv6/icmp.c"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "db76b75ede3810e7cf9cfea5067d4f3e0993768b", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "19e42490c89bac9a388f28179e66bebbef350f99", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "531c1aec81bfe19d00af13da5531fbb8209e4bd2", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "719d3932b8f6e3348ce2f0ac58e278301fc17575", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "c89477ad79446867394360b29bb801010fc3ff22", "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", "net/ipv6/icmp.c"], "versions": [{"version": "2.6.12", "status": "affected"}, {"version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.128", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.75", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.14", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.4", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "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": "2.6.12", "versionEndExcluding": "6.6.128"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.12.75"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.18.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.19.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "7.0"}]}]}], "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"}}}}

{}

{"cveTags": [], "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."}], "id": "CVE-2026-46266", "lastModified": "2026-06-03T18:16:28.147", "metrics": {}, "published": "2026-06-03T18:16:28.147", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/19e42490c89bac9a388f28179e66bebbef350f99"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/531c1aec81bfe19d00af13da5531fbb8209e4bd2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/719d3932b8f6e3348ce2f0ac58e278301fc17575"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c89477ad79446867394360b29bb801010fc3ff22"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/db76b75ede3810e7cf9cfea5067d4f3e0993768b"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{}