CVE-2026-98631

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98631", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.361Z", "datePublished": "2026-10-18T15:19:53.529Z", "dateUpdated": "2026-10-19T09:22:59.147Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:22:59.147Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: Use a 32-bit compare in xsk_map_gen_lookup\n\nxsk_map_gen_lookup() loads a u32 key and compares it with max_entries\nusing BPF_JMP_IMM. BPF immediates are sign-extended to 64 bits, so a\nmax_entries value of 0x80000000 or higher becomes a threshold larger\nthan every zero-extended 32-bit key. An out-of-range index then skips\nthe bounds check and the generated lookup reads past xsk_map[].\n\nCompare with BPF_JMP32_IMM so the check stays in 32-bit unsigned range."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/xdp/xskmap.c"], "versions": [{"version": "e65650f291ee72fc578d6346080fc4699204ef2c", "lessThan": "c6d5c582d55a8f229d75e98d62eaa065b0deb18d", "status": "affected", "versionType": "git"}, {"version": "e65650f291ee72fc578d6346080fc4699204ef2c", "lessThan": "227ec890559e922e235eb543646e3bf0bd8269b0", "status": "affected", "versionType": "git"}, {"version": "e65650f291ee72fc578d6346080fc4699204ef2c", "lessThan": "11d9be35c1f4233798e99be98bc474f83a254c6c", "status": "affected", "versionType": "git"}, {"version": "e65650f291ee72fc578d6346080fc4699204ef2c", "lessThan": "123f90f394ca404ab8796a7c8072ff7fa5b65a9c", "status": "affected", "versionType": "git"}, {"version": "e65650f291ee72fc578d6346080fc4699204ef2c", "lessThan": "36461e58f88a1b723f86693f437ac12e60ff4363", "status": "affected", "versionType": "git"}, {"version": "e65650f291ee72fc578d6346080fc4699204ef2c", "lessThan": "b5c0cff0c5331582ab01c4c423731453a8381acc", "status": "affected", "versionType": "git"}, {"version": "e65650f291ee72fc578d6346080fc4699204ef2c", "lessThan": "3c1e0a4bc156b8d5c5772dbc76b9ea74dce5ca24", "status": "affected", "versionType": "git"}, {"version": "e65650f291ee72fc578d6346080fc4699204ef2c", "lessThan": "70504de0bb627848667207bec7ccfd647deb8814", "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/xdp/xskmap.c"], "versions": [{"version": "5.5", "status": "affected"}, {"version": "0", "lessThan": "5.5", "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": "5.5", "versionEndExcluding": "5.10.271"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "5.15.222"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.1.189"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.12.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.18.55"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "7.2.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/c6d5c582d55a8f229d75e98d62eaa065b0deb18d"}, {"url": "https://git.kernel.org/stable/c/227ec890559e922e235eb543646e3bf0bd8269b0"}, {"url": "https://git.kernel.org/stable/c/11d9be35c1f4233798e99be98bc474f83a254c6c"}, {"url": "https://git.kernel.org/stable/c/123f90f394ca404ab8796a7c8072ff7fa5b65a9c"}, {"url": "https://git.kernel.org/stable/c/36461e58f88a1b723f86693f437ac12e60ff4363"}, {"url": "https://git.kernel.org/stable/c/b5c0cff0c5331582ab01c4c423731453a8381acc"}, {"url": "https://git.kernel.org/stable/c/3c1e0a4bc156b8d5c5772dbc76b9ea74dce5ca24"}, {"url": "https://git.kernel.org/stable/c/70504de0bb627848667207bec7ccfd647deb8814"}], "title": "xsk: Use a 32-bit compare in xsk_map_gen_lookup", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/xdp/xskmap.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "c6d5c582d55a8f229d75e98d62eaa065b0deb18d", "status": "affected", "version": "e65650f291ee72fc578d6346080fc4699204ef2c", "versionType": "git"}, {"lessThan": "227ec890559e922e235eb543646e3bf0bd8269b0", "status": "affected", "version": "e65650f291ee72fc578d6346080fc4699204ef2c", "versionType": "git"}, {"lessThan": "11d9be35c1f4233798e99be98bc474f83a254c6c", "status": "affected", "version": "e65650f291ee72fc578d6346080fc4699204ef2c", "versionType": "git"}, {"lessThan": "123f90f394ca404ab8796a7c8072ff7fa5b65a9c", "status": "affected", "version": "e65650f291ee72fc578d6346080fc4699204ef2c", "versionType": "git"}, {"lessThan": "36461e58f88a1b723f86693f437ac12e60ff4363", "status": "affected", "version": "e65650f291ee72fc578d6346080fc4699204ef2c", "versionType": "git"}, {"lessThan": "b5c0cff0c5331582ab01c4c423731453a8381acc", "status": "affected", "version": "e65650f291ee72fc578d6346080fc4699204ef2c", "versionType": "git"}, {"lessThan": "3c1e0a4bc156b8d5c5772dbc76b9ea74dce5ca24", "status": "affected", "version": "e65650f291ee72fc578d6346080fc4699204ef2c", "versionType": "git"}, {"lessThan": "70504de0bb627848667207bec7ccfd647deb8814", "status": "affected", "version": "e65650f291ee72fc578d6346080fc4699204ef2c", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/xdp/xskmap.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.5"}, {"lessThan": "5.5", "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\nxsk: Use a 32-bit compare in xsk_map_gen_lookup\n\nxsk_map_gen_lookup() loads a u32 key and compares it with max_entries\nusing BPF_JMP_IMM. BPF immediates are sign-extended to 64 bits, so a\nmax_entries value of 0x80000000 or higher becomes a threshold larger\nthan every zero-extended 32-bit key. An out-of-range index then skips\nthe bounds check and the generated lookup reads past xsk_map[].\n\nCompare with BPF_JMP32_IMM so the check stays in 32-bit unsigned range."}], "id": "CVE-2026-98631", "lastModified": "2026-10-19T10:19:27.347", "metrics": {}, "published": "2026-10-18T16:17:16.180", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/11d9be35c1f4233798e99be98bc474f83a254c6c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/123f90f394ca404ab8796a7c8072ff7fa5b65a9c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/227ec890559e922e235eb543646e3bf0bd8269b0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/36461e58f88a1b723f86693f437ac12e60ff4363"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3c1e0a4bc156b8d5c5772dbc76b9ea74dce5ca24"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/70504de0bb627848667207bec7ccfd647deb8814"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b5c0cff0c5331582ab01c4c423731453a8381acc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c6d5c582d55a8f229d75e98d62eaa065b0deb18d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: xsk: Use a 32-bit compare in xsk_map_gen_lookup", "id": "2555032", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2555032"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nxsk: Use a 32-bit compare in xsk_map_gen_lookup\nxsk_map_gen_lookup() loads a u32 key and compares it with max_entries\nusing BPF_JMP_IMM. BPF immediates are sign-extended to 64 bits, so a\nmax_entries value of 0x80000000 or higher becomes a threshold larger\nthan every zero-extended 32-bit key. An out-of-range index then skips\nthe bounds check and the generated lookup reads past xsk_map[].\nCompare with BPF_JMP32_IMM so the check stays in 32-bit unsigned range.", "A flaw was found in the Linux kernel. A local attacker can cause a Denial of Service (DoS) or potentially expose sensitive memory by triggering an out-of-bounds read in the Berkeley Packet Filter (BPF) socket map implementation. This issue occurs because socket map lookups perform a 64-bit comparison on 32-bit keys, allowing out-of-range index values to bypass bounds checking when maps are configured with large entry limits."], "name": "CVE-2026-98631", "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": "Not affected", "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-2026-98631\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98631\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98631.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e65650f291ee72fc578d6346080fc4699204ef2c,c6d5c582d55a8f229d75e98d62eaa065b0deb18d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e65650f291ee72fc578d6346080fc4699204ef2c,227ec890559e922e235eb543646e3bf0bd8269b0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e65650f291ee72fc578d6346080fc4699204ef2c,11d9be35c1f4233798e99be98bc474f83a254c6c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e65650f291ee72fc578d6346080fc4699204ef2c,123f90f394ca404ab8796a7c8072ff7fa5b65a9c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e65650f291ee72fc578d6346080fc4699204ef2c,36461e58f88a1b723f86693f437ac12e60ff4363)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e65650f291ee72fc578d6346080fc4699204ef2c,b5c0cff0c5331582ab01c4c423731453a8381acc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e65650f291ee72fc578d6346080fc4699204ef2c,3c1e0a4bc156b8d5c5772dbc76b9ea74dce5ca24)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e65650f291ee72fc578d6346080fc4699204ef2c,70504de0bb627848667207bec7ccfd647deb8814)"}}], "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": "5.5"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.5)"}}, {"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,*]"}}], "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": "2026-10-19T00:00:10.774200+00:00", "updated": "2026-10-23T06:45:07.474523+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}