{"id":"CVE-2026-98007","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject non-scalar bpf_loop iteration counts\n\nbpf_loop() declares its nr_loops argument as ARG_ANYTHING","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject non-scalar bpf_loop iteration counts\n\nbpf_loop() declares its nr_loops argument as ARG_ANYTHING. Privileged\nprograms may pass pointer values to such argumen…","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-617"],"vendor":"Linux","product":"Linux","affected":["Linux >= bfc5c19b4b48840627af0d0f1c8f4461b276e508 < 2ff38b3552af53238aee6c877ae64cc798d46fce","Linux >= bb124da69c47dd98d69361ec13244ece50bec63e < 656d40d1ca228ee21a9b3280432479fc9eae75ab","Linux >= bb124da69c47dd98d69361ec13244ece50bec63e < e2e1161e03fecff6d2229a81b024337144bfcd97","Linux >= bb124da69c47dd98d69361ec13244ece50bec63e < f8ae8275c721334ee50fafdd986fb83294eb941a","Linux >= bb124da69c47dd98d69361ec13244ece50bec63e < c3fd8e5fd100f122bad503bdc0e9277219533253","Linux >= 6.6.15 < 6.6.158","Linux 6.7"],"published":"2026-09-25","updated":"2026-10-03","sourceUpdated":"2026-10-03T11:18:23.630","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98007","references":[{"url":"https://git.kernel.org/stable/c/2ff38b3552af53238aee6c877ae64cc798d46fce","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/656d40d1ca228ee21a9b3280432479fc9eae75ab","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c3fd8e5fd100f122bad503bdc0e9277219533253","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e2e1161e03fecff6d2229a81b024337144bfcd97","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f8ae8275c721334ee50fafdd986fb83294eb941a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98007.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98007"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2541287"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98007"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98007"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98007.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00168,"epssPercentile":0.06049,"cvssSource":"vendor","ingestedAt":"2026-09-25T11:06:38.860Z","slug":"CVE-2026-98007","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject non-scalar bpf_loop iteration counts\n\nbpf_loop() declares its nr_loops argument as ARG_ANYTHING. Privileged\nprograms may pass pointer values to such arguments, so check_func_arg()\nlets a pointer-valued R1 reach the helper-specific checks.\n\nSince commit bb124da69c47 (\"bpf: keep track of max number of bpf_loop\ncallback iterations\"), the verifier marks R1 precise and reads its upper\nbound to limit callback simulation. Precision backtracking only accepts\nscalar registers, so passing a pointer instead triggers the \"backtracking\nmisuse\" verifier warning. Kernels with panic_on_warn enabled subsequently\npanic.\n\nIntroduce ARG_SCALAR for helper arguments that only accept scalar values\nand use it for bpf_loop() nr_loops. Generic helper argument validation then\nrejects pointers before loop inlining and precision processing.\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** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, 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-2026-98007.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":212507,"id":"CVE-2026-98007","ts":1790668194824,"field":"cvss","old":null,"new":"5.5"},{"seq":212506,"id":"CVE-2026-98007","ts":1790668194824,"field":"severity","old":"none","new":"medium"}]}