{"id":"CVE-2026-46043","revision":null,"records":[{"revision":"007e0941b5b84c429f8c242325d03786","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-46043","aliases":[],"title":"RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv\n\nrxe_rcv() currently checks only that the incoming packet is at least\nheader_size(pkt) bytes long before payload_size() is used.\n\nHowever, payload_size() subtracts both the attacker-controlled BTH pad\nfield and RXE_ICRC_SIZE from pkt->paylen:\n\n payload_size = pkt->paylen - offset[RXE_PAYLOAD] - bth_pad(pkt)\n - RXE_ICRC_SIZE\n\nThis means a short packet can still make payload_size() underflow even\nif it includes enough bytes for the fixed headers. Simply requiring\nheader_size(pkt) + RXE_ICRC_SIZE is not sufficient either, because a\npacket with a forged non-zero BTH pad can still leave payload_size()\nnegative and pass an underflowed value to later receive-path users.\n\nFix this by validating pkt->paylen against the full minimum length\nrequired by payload_size(): header_size(pkt) + bth_pad(pkt) +\nRXE_ICRC_SIZE.","state":0,"publishedAt":"2026-05-27T12:56:57.987+00:00","modifiedAt":"2026-10-19T19:26:42.012+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/infiniband/sw/rxe/rxe_recv.c\"\n ],\n \"versions\": [\n {\n \"version\": \"8700e3e7c4857d28ebaa824509934556da0b3e76\",\n \"lessThan\": \"c4376c672c3648d5bdc31dfffc329d07164f93c4\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"8700e3e7c4857d28ebaa824509934556da0b3e76\",\n \"lessThan\": \"5fedefec757192dcaad29a664ac332c7601be144\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"8700e3e7c4857d28ebaa824509934556da0b3e76\",\n \"lessThan\": \"2c0d71ef12f46c57d37bc571f3f2797db7eb50cc\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"8700e3e7c4857d28ebaa824509934556da0b3e76\",\n \"lessThan\": \"2fd4f8b749309a61c3f3f88ee8891d94f79e1240\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"8700e3e7c4857d28ebaa824509934556da0b3e76\",\n \"lessThan\": \"f83519a4c122c9c7a850a2197648a9ff4c67c520\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"8700e3e7c4857d28ebaa824509934556da0b3e76\",\n \"lessThan\": \"9b924f3a26b21330a837cfe72e819b6393bbeeaa\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"8700e3e7c4857d28ebaa824509934556da0b3e76\",\n \"lessThan\": \"e8ee0e792d475b1067c199ef0af1b6221fa6f43d\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"8700e3e7c4857d28ebaa824509934556da0b3e76\",\n \"lessThan\": \"7244491dab347f648e661da96dc0febadd9daec3\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/infiniband/sw/rxe/rxe_recv.c\"\n ],\n \"versions\": [\n {\n \"version\": \"4.8\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"4.8\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.258\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.209\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.175\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.140\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.86\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.27\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.0.4\",\n \"lessThanOrEqual\": \"7.0.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.1\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","score":9.1,"severity":"CRITICAL"}],"references":["https://git.kernel.org/stable/c/c4376c672c3648d5bdc31dfffc329d07164f93c4","https://git.kernel.org/stable/c/5fedefec757192dcaad29a664ac332c7601be144","https://git.kernel.org/stable/c/2c0d71ef12f46c57d37bc571f3f2797db7eb50cc","https://git.kernel.org/stable/c/2fd4f8b749309a61c3f3f88ee8891d94f79e1240","https://git.kernel.org/stable/c/f83519a4c122c9c7a850a2197648a9ff4c67c520","https://git.kernel.org/stable/c/9b924f3a26b21330a837cfe72e819b6393bbeeaa","https://git.kernel.org/stable/c/e8ee0e792d475b1067c199ef0af1b6221fa6f43d","https://git.kernel.org/stable/c/7244491dab347f648e661da96dc0febadd9daec3"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-46043","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-46043","identifiers":["CVE-2026-46043"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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