{"id":"CVE-2026-98019","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: mark a NULL call argument precise\n\ncheck_func_arg() allows bpf_register_is_null() for nullable arguments\nw/o marking the underlying scalar register precise","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: mark a NULL call argument precise\n\ncheck_func_arg() allows bpf_register_is_null() for nullable arguments\nw/o marking the underlying scalar register precise. Hence …","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-1025"],"vendor":"Linux","product":"Linux","affected":["Linux >= b5dc0163d8fd78e64a7e21f309cf932fda34353e < 69a9ad004ccf5d45e534c7d503f47f643abe64b7","Linux >= b5dc0163d8fd78e64a7e21f309cf932fda34353e < 1a3a10b030c96ea88868ccc060a16827c01eaa5a","Linux 5.3"],"published":"2026-09-25","updated":"2026-10-15","sourceUpdated":"2026-10-15T11:18:09.863","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98019","references":[{"url":"https://git.kernel.org/stable/c/1a3a10b030c96ea88868ccc060a16827c01eaa5a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/69a9ad004ccf5d45e534c7d503f47f643abe64b7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b1fe6379e401b8ce0f561cb4d84af2b70b4343c3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98019.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98019"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2541052"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98019"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98019"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98019.mbox"},{"url":"https://git.kernel.org/stable/c/febbb66e682d8328f7c5bcbdd5e4291abab2e858"},{"url":"https://git.kernel.org/stable/c/627089c278df58749f25686c6a3caf7e181b5951"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00168,"epssPercentile":0.0598,"cvssSource":"vendor","ingestedAt":"2026-09-25T11:06:38.856Z","slug":"CVE-2026-98019","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbpf: mark a NULL call argument precise\n\ncheck_func_arg() allows bpf_register_is_null() for nullable arguments\nw/o marking the underlying scalar register precise. Hence a checkpoint\ncreated on such a path would prune against arbitrary scalar value.\n\ncheck_helper_call() enforces second parameter of the\nbpf_get_local_storage() to be zero, w/o marking the underlying scalar\nregister precise. Hence a checkpoint created on such a path would\nprune against arbitrary scalar value.\n\nGrouping these two into one patch, as they share the same fixes tag.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98019.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":212474,"id":"CVE-2026-98019","ts":1790668185884,"field":"cvss","old":null,"new":"5.5"},{"seq":212473,"id":"CVE-2026-98019","ts":1790668185884,"field":"severity","old":"none","new":"medium"}]}