CVE-2026-98816

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98816", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.371Z", "datePublished": "2026-10-18T15:49:05.616Z", "dateUpdated": "2026-10-19T09:26:09.337Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:26:09.337Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix overflow of jump offset in constant blinding\n\nbpf_jit_blind_insn() rewrites 'if rX op imm goto off' into:\n\n AX = imm ^ rnd\n AX ^= rnd\n if rX op AX goto off\n\nand subtracts 2 from off when the jump is backward. off is s16, so\n-32767 and -32768 wrap and the jump goes 32767 insns forward, past the\nend of the prog. The jump is inside the patch, hence bpf_adj_branches()\ndoesn't check it. The kernel crashes when such prog runs with\nbpf_jit_harden=2.\n\nReturn -ERANGE in such case. bpf_jit_blind_constants() fails the same\nway when blinding of other insns moves a jump out of range."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/bpf/core.c"], "versions": [{"version": "4f3446bb809f20ad56cadf712e6006815ae7a8f9", "lessThan": "443328237113ee0ea515e506497334d871dbc2aa", "status": "affected", "versionType": "git"}, {"version": "4f3446bb809f20ad56cadf712e6006815ae7a8f9", "lessThan": "ad139384ecddb6f3e7e3c3c12765aafae0e39670", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/bpf/core.c"], "versions": [{"version": "4.7", "status": "affected"}, {"version": "0", "lessThan": "4.7", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.10", "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": "4.7", "versionEndExcluding": "7.2.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/443328237113ee0ea515e506497334d871dbc2aa"}, {"url": "https://git.kernel.org/stable/c/ad139384ecddb6f3e7e3c3c12765aafae0e39670"}], "title": "bpf: Fix overflow of jump offset in constant blinding", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["kernel/bpf/core.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "443328237113ee0ea515e506497334d871dbc2aa", "status": "affected", "version": "4f3446bb809f20ad56cadf712e6006815ae7a8f9", "versionType": "git"}, {"lessThan": "ad139384ecddb6f3e7e3c3c12765aafae0e39670", "status": "affected", "version": "4f3446bb809f20ad56cadf712e6006815ae7a8f9", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["kernel/bpf/core.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.7"}, {"lessThan": "4.7", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.10", "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 overflow of jump offset in constant blinding\n\nbpf_jit_blind_insn() rewrites 'if rX op imm goto off' into:\n\n AX = imm ^ rnd\n AX ^= rnd\n if rX op AX goto off\n\nand subtracts 2 from off when the jump is backward. off is s16, so\n-32767 and -32768 wrap and the jump goes 32767 insns forward, past the\nend of the prog. The jump is inside the patch, hence bpf_adj_branches()\ndoesn't check it. The kernel crashes when such prog runs with\nbpf_jit_harden=2.\n\nReturn -ERANGE in such case. bpf_jit_blind_constants() fails the same\nway when blinding of other insns moves a jump out of range."}], "id": "CVE-2026-98816", "lastModified": "2026-10-19T10:19:45.683", "metrics": {}, "published": "2026-10-18T16:17:35.770", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/443328237113ee0ea515e506497334d871dbc2aa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ad139384ecddb6f3e7e3c3c12765aafae0e39670"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: bpf: Fix overflow of jump offset in constant blinding", "id": "2555199", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2555199"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-191", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbpf: Fix overflow of jump offset in constant blinding\nbpf_jit_blind_insn() rewrites 'if rX op imm goto off' into:\nAX = imm ^ rnd\nAX ^= rnd\nif rX op AX goto off\nand subtracts 2 from off when the jump is backward. off is s16, so\n-32767 and -32768 wrap and the jump goes 32767 insns forward, past the\nend of the prog. The jump is inside the patch, hence bpf_adj_branches()\ndoesn't check it. The kernel crashes when such prog runs with\nbpf_jit_harden=2.\nReturn -ERANGE in such case. bpf_jit_blind_constants() fails the same\nway when blinding of other insns moves a jump out of range.", "A flaw was found in the Linux kernel's BPF (Berkeley Packet Filter) subsystem. An integer overflow occurs in the constant blinding mechanism when calculating backward jump offsets during BPF program hardening. A local attacker capable of loading BPF programs could exploit this issue to jump beyond program boundaries, causing a kernel crash and resulting in a Denial of Service (DoS)."], "name": "CVE-2026-98816", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "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-2026-98816\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98816\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98816.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4f3446bb809f20ad56cadf712e6006815ae7a8f9,443328237113ee0ea515e506497334d871dbc2aa)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4f3446bb809f20ad56cadf712e6006815ae7a8f9,ad139384ecddb6f3e7e3c3c12765aafae0e39670)"}}], "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": "4.7"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.7)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.10,7.3.0)"}}, {"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": "2026-10-18T20:30:17.104382+00:00", "updated": "2026-10-24T01:45:17.366378+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-190", "CWE-191"]}