CVE-2026-98590

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98590", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.358Z", "datePublished": "2026-10-18T15:19:02.747Z", "dateUpdated": "2026-10-19T09:22:15.786Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:22:15.786Z"}, "descriptions": [{"lang": "en", "value": "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)."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/core/filter.c"], "versions": [{"version": "c3c16f2ea6d20159903cf93afbb1155f3d8348d5", "lessThan": "e3ddcf4aeb342d4de2e5761c7042270d454752de", "status": "affected", "versionType": "git"}, {"version": "c3c16f2ea6d20159903cf93afbb1155f3d8348d5", "lessThan": "4a41d064facc3330e176ecbbf5b0026ed18a5c69", "status": "affected", "versionType": "git"}, {"version": "c3c16f2ea6d20159903cf93afbb1155f3d8348d5", "lessThan": "70288599d1754e157df8326239316dbdf08ea33c", "status": "affected", "versionType": "git"}, {"version": "c3c16f2ea6d20159903cf93afbb1155f3d8348d5", "lessThan": "ea4dc96c902ccfa49dd3e4f23c443dab4a74b018", "status": "affected", "versionType": "git"}, {"version": "c3c16f2ea6d20159903cf93afbb1155f3d8348d5", "lessThan": "b3f37afc7fd7c52bc2114310aff1eb24c7cd4d73", "status": "affected", "versionType": "git"}, {"version": "c3c16f2ea6d20159903cf93afbb1155f3d8348d5", "lessThan": "d95dd5a6c6cd08d5ae466d3aed27b3cf59155a6c", "status": "affected", "versionType": "git"}, {"version": "c3c16f2ea6d20159903cf93afbb1155f3d8348d5", "lessThan": "84ebb991ae985149079ae9ab51b7e3ba25a9ff53", "status": "affected", "versionType": "git"}, {"version": "c3c16f2ea6d20159903cf93afbb1155f3d8348d5", "lessThan": "4a4852376e3a2727ea40e61143d6d7c22bb6dfad", "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/core/filter.c"], "versions": [{"version": "5.8", "status": "affected"}, {"version": "0", "lessThan": "5.8", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.271", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.222", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.189", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.112", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.55", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.9", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "5.8", "versionEndExcluding": "5.10.271"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "5.15.222"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.1.189"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.12.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.18.55"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "7.2.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/e3ddcf4aeb342d4de2e5761c7042270d454752de"}, {"url": "https://git.kernel.org/stable/c/4a41d064facc3330e176ecbbf5b0026ed18a5c69"}, {"url": "https://git.kernel.org/stable/c/70288599d1754e157df8326239316dbdf08ea33c"}, {"url": "https://git.kernel.org/stable/c/ea4dc96c902ccfa49dd3e4f23c443dab4a74b018"}, {"url": "https://git.kernel.org/stable/c/b3f37afc7fd7c52bc2114310aff1eb24c7cd4d73"}, {"url": "https://git.kernel.org/stable/c/d95dd5a6c6cd08d5ae466d3aed27b3cf59155a6c"}, {"url": "https://git.kernel.org/stable/c/84ebb991ae985149079ae9ab51b7e3ba25a9ff53"}, {"url": "https://git.kernel.org/stable/c/4a4852376e3a2727ea40e61143d6d7c22bb6dfad"}], "title": "bpf: Fix bpf_sock context code generation", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/core/filter.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "e3ddcf4aeb342d4de2e5761c7042270d454752de", "status": "affected", "version": "c3c16f2ea6d20159903cf93afbb1155f3d8348d5", "versionType": "git"}, {"lessThan": "4a41d064facc3330e176ecbbf5b0026ed18a5c69", "status": "affected", "version": "c3c16f2ea6d20159903cf93afbb1155f3d8348d5", "versionType": "git"}, {"lessThan": "70288599d1754e157df8326239316dbdf08ea33c", "status": "affected", "version": "c3c16f2ea6d20159903cf93afbb1155f3d8348d5", "versionType": "git"}, {"lessThan": "ea4dc96c902ccfa49dd3e4f23c443dab4a74b018", "status": "affected", "version": "c3c16f2ea6d20159903cf93afbb1155f3d8348d5", "versionType": "git"}, {"lessThan": "b3f37afc7fd7c52bc2114310aff1eb24c7cd4d73", "status": "affected", "version": "c3c16f2ea6d20159903cf93afbb1155f3d8348d5", "versionType": "git"}, {"lessThan": "d95dd5a6c6cd08d5ae466d3aed27b3cf59155a6c", "status": "affected", "version": "c3c16f2ea6d20159903cf93afbb1155f3d8348d5", "versionType": "git"}, {"lessThan": "84ebb991ae985149079ae9ab51b7e3ba25a9ff53", "status": "affected", "version": "c3c16f2ea6d20159903cf93afbb1155f3d8348d5", "versionType": "git"}, {"lessThan": "4a4852376e3a2727ea40e61143d6d7c22bb6dfad", "status": "affected", "version": "c3c16f2ea6d20159903cf93afbb1155f3d8348d5", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/core/filter.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.8"}, {"lessThan": "5.8", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.271", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.222", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.189", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.158", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.112", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.55", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.9", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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)."}], "id": "CVE-2026-98590", "lastModified": "2026-10-19T10:19:20.057", "metrics": {}, "published": "2026-10-18T16:17:11.610", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4a41d064facc3330e176ecbbf5b0026ed18a5c69"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4a4852376e3a2727ea40e61143d6d7c22bb6dfad"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/70288599d1754e157df8326239316dbdf08ea33c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/84ebb991ae985149079ae9ab51b7e3ba25a9ff53"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b3f37afc7fd7c52bc2114310aff1eb24c7cd4d73"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d95dd5a6c6cd08d5ae466d3aed27b3cf59155a6c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e3ddcf4aeb342d4de2e5761c7042270d454752de"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ea4dc96c902ccfa49dd3e4f23c443dab4a74b018"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: bpf: Fix bpf_sock context code generation", "id": "2555018", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2555018"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-681", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbpf: Fix bpf_sock context code generation\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.\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).", "A flaw was found in the Linux kernel's Berkeley Packet Filter (BPF) subsystem. An error in context code generation incorrectly sign-extends register values when reading socket queue mappings, causing runtime register values to exceed boundaries tracked by the kernel's safety verifier. A local user with permission to load BPF programs can exploit this vulnerability to bypass kernel verifier checks, potentially leading to out-of-bounds memory access, system crash, or local privilege escalation."], "name": "CVE-2026-98590", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98590\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98590\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98590.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c3c16f2ea6d20159903cf93afbb1155f3d8348d5,e3ddcf4aeb342d4de2e5761c7042270d454752de)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c3c16f2ea6d20159903cf93afbb1155f3d8348d5,4a41d064facc3330e176ecbbf5b0026ed18a5c69)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c3c16f2ea6d20159903cf93afbb1155f3d8348d5,70288599d1754e157df8326239316dbdf08ea33c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c3c16f2ea6d20159903cf93afbb1155f3d8348d5,ea4dc96c902ccfa49dd3e4f23c443dab4a74b018)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c3c16f2ea6d20159903cf93afbb1155f3d8348d5,b3f37afc7fd7c52bc2114310aff1eb24c7cd4d73)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c3c16f2ea6d20159903cf93afbb1155f3d8348d5,d95dd5a6c6cd08d5ae466d3aed27b3cf59155a6c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c3c16f2ea6d20159903cf93afbb1155f3d8348d5,84ebb991ae985149079ae9ab51b7e3ba25a9ff53)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c3c16f2ea6d20159903cf93afbb1155f3d8348d5,4a4852376e3a2727ea40e61143d6d7c22bb6dfad)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.8"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.8)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.271,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.222,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.189,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.158,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.112,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.55,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.9,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc5,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-10-18T23:00:12.910367+00:00", "updated": "2026-10-20T16:45:14.062934+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-190", "CWE-195", "CWE-681"]}