{"id":"CVE-2026-98007","revision":"cd75a00ddb924fe68c87ed84cff917d3","records":[{"revision":"cd75a00ddb924fe68c87ed84cff917d3","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98007","aliases":[],"title":"bpf: Reject non-scalar bpf_loop iteration counts","description":"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 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.","state":0,"publishedAt":"2026-09-25T10:23:32.939+00:00","modifiedAt":"2026-10-19T09:12:12.779+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"include/linux/bpf.h\",\n                        \"kernel/bpf/bpf_iter.c\",\n                        \"kernel/bpf/verifier.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"bfc5c19b4b48840627af0d0f1c8f4461b276e508\",\n                            \"lessThan\": \"2ff38b3552af53238aee6c877ae64cc798d46fce\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bb124da69c47dd98d69361ec13244ece50bec63e\",\n                            \"lessThan\": \"656d40d1ca228ee21a9b3280432479fc9eae75ab\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bb124da69c47dd98d69361ec13244ece50bec63e\",\n                            \"lessThan\": \"e2e1161e03fecff6d2229a81b024337144bfcd97\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bb124da69c47dd98d69361ec13244ece50bec63e\",\n                            \"lessThan\": \"f8ae8275c721334ee50fafdd986fb83294eb941a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bb124da69c47dd98d69361ec13244ece50bec63e\",\n                            \"lessThan\": \"c3fd8e5fd100f122bad503bdc0e9277219533253\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6.6.15\",\n                            \"lessThan\": \"6.6.158\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"include/linux/bpf.h\",\n                        \"kernel/bpf/bpf_iter.c\",\n                        \"kernel/bpf/verifier.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.7\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.7\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.158\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.111\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.53\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.7\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/2ff38b3552af53238aee6c877ae64cc798d46fce","https://git.kernel.org/stable/c/656d40d1ca228ee21a9b3280432479fc9eae75ab","https://git.kernel.org/stable/c/e2e1161e03fecff6d2229a81b024337144bfcd97","https://git.kernel.org/stable/c/f8ae8275c721334ee50fafdd986fb83294eb941a","https://git.kernel.org/stable/c/c3fd8e5fd100f122bad503bdc0e9277219533253"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98007","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98007","identifiers":["CVE-2026-98007"]},"retained":false,"historicalAffected":[]}],"coverage":[]}