{"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":"none","vendor":"Linux","product":"Linux","affected":["Linux >= bb124da69c47dd98d69361ec13244ece50bec63e < 656d40d1ca228ee21a9b3280432479fc9eae75ab","Linux >= bb124da69c47dd98d69361ec13244ece50bec63e < e2e1161e03fecff6d2229a81b024337144bfcd97","Linux >= bb124da69c47dd98d69361ec13244ece50bec63e < f8ae8275c721334ee50fafdd986fb83294eb941a","Linux >= bb124da69c47dd98d69361ec13244ece50bec63e < c3fd8e5fd100f122bad503bdc0e9277219533253","Linux bfc5c19b4b48840627af0d0f1c8f4461b276e508","Linux >= 6.6.15 < 6.7","Linux 6.7"],"published":"2026-09-25","updated":"2026-09-25","sourceUpdated":"2026-09-25T11:17:28.967","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98007","references":[{"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"}],"tags":["nvd","cve.org"],"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.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}