{"id":"CVE-2026-98590","revision":null,"records":[{"revision":"de357d52b58d4e7c9174a8375cc59318","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98590","aliases":[],"title":"bpf: Fix bpf_sock context code generation","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix bpf_sock context code generation\n\nCurrently, the ctx access code reads the rx_queue_mapping\nfield with either a 4-byte or 2-byte load. The rest of the bits\nin the register are marked known zero by the verifier. However,\nthe emitted ctx access code places in the register on certain\nthe special value (-1) using BPF_MOV_IMM64, which gets sign-extended\nto turn on all the bits in the register. By shifting this value right,\nthe program ends up with a value at runtime above what the verifier\nassumes is possible.\n\nFix this by ensuring the read value is as wide as the assumed size.\nUse MOV32 instructions instead of MOV64 instructions to keep\nthe upper bits zero as assumed by the verifier. Also properly report\nthe size of the destination variable (the bpf_sock field, 4 bytes) instead\nof the source (the socket field, 2 bytes).","state":0,"publishedAt":"2026-10-18T15:19:02.747+00:00","modifiedAt":"2026-10-19T09:22:15.786+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                        \"net/core/filter.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"c3c16f2ea6d20159903cf93afbb1155f3d8348d5\",\n                            \"lessThan\": \"e3ddcf4aeb342d4de2e5761c7042270d454752de\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c3c16f2ea6d20159903cf93afbb1155f3d8348d5\",\n                            \"lessThan\": \"4a41d064facc3330e176ecbbf5b0026ed18a5c69\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c3c16f2ea6d20159903cf93afbb1155f3d8348d5\",\n                            \"lessThan\": \"70288599d1754e157df8326239316dbdf08ea33c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c3c16f2ea6d20159903cf93afbb1155f3d8348d5\",\n                            \"lessThan\": \"ea4dc96c902ccfa49dd3e4f23c443dab4a74b018\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c3c16f2ea6d20159903cf93afbb1155f3d8348d5\",\n                            \"lessThan\": \"b3f37afc7fd7c52bc2114310aff1eb24c7cd4d73\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c3c16f2ea6d20159903cf93afbb1155f3d8348d5\",\n                            \"lessThan\": \"d95dd5a6c6cd08d5ae466d3aed27b3cf59155a6c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c3c16f2ea6d20159903cf93afbb1155f3d8348d5\",\n                            \"lessThan\": \"84ebb991ae985149079ae9ab51b7e3ba25a9ff53\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c3c16f2ea6d20159903cf93afbb1155f3d8348d5\",\n                            \"lessThan\": \"4a4852376e3a2727ea40e61143d6d7c22bb6dfad\",\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                        \"net/core/filter.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.8\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.8\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.271\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.222\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.189\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.158\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.112\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.55\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.9\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/e3ddcf4aeb342d4de2e5761c7042270d454752de","https://git.kernel.org/stable/c/4a41d064facc3330e176ecbbf5b0026ed18a5c69","https://git.kernel.org/stable/c/70288599d1754e157df8326239316dbdf08ea33c","https://git.kernel.org/stable/c/ea4dc96c902ccfa49dd3e4f23c443dab4a74b018","https://git.kernel.org/stable/c/b3f37afc7fd7c52bc2114310aff1eb24c7cd4d73","https://git.kernel.org/stable/c/d95dd5a6c6cd08d5ae466d3aed27b3cf59155a6c","https://git.kernel.org/stable/c/84ebb991ae985149079ae9ab51b7e3ba25a9ff53","https://git.kernel.org/stable/c/4a4852376e3a2727ea40e61143d6d7c22bb6dfad"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98590","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98590","identifiers":["CVE-2026-98590"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-10-24T10:27:30.8908525+00:00","complete":true,"records":1756,"lastAttemptAt":"2026-10-24T10:27:30.8908525+00:00","lastSuccessAt":"2026-10-24T10:27:31.1285633+00:00","error":null,"lastVerifiedAt":"2026-10-24T10:27:31.1285641+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-9b3cad78792c7367da03684feab05819ddebc4d137048bdbbdabdbb4d2879391-c6a8234687801ee57ab2aeb77d20947f334a6cc2941ea8b25213d5a7dcebf0ce","complete":true,"records":413884,"lastAttemptAt":"2026-10-24T10:27:30.7016219+00:00","lastSuccessAt":"2026-10-24T10:27:30.6836858+00:00","error":null,"lastVerifiedAt":"2026-10-24T10:27:30.7016219+00:00","snapshotPublishedAt":"2026-10-24T10:24:24+00:00","importing":false,"stagedRecords":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-10-24T10:27:30.8908525+00:00","complete":true,"records":1093,"lastAttemptAt":"2026-10-24T10:27:30.8908525+00:00","lastSuccessAt":"2026-10-24T10:27:31.3689689+00:00","error":null,"lastVerifiedAt":"2026-10-24T10:27:31.3689698+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-16ad89dfea13ab9e9b0108e63a759d63bd4559cc68b58491107d62ee35bbbaf2","complete":true,"records":1965,"lastAttemptAt":"2026-10-24T10:27:30.7587662+00:00","lastSuccessAt":"2026-10-23T16:01:26.4487605+00:00","error":null,"lastVerifiedAt":"2026-10-24T10:27:30.7587662+00:00","snapshotPublishedAt":"2026-10-21T12:18:07+00:00","importing":false,"stagedRecords":0}]}