CVE-2026-98376
- Source
- https://cve.org/CVERecord?id=CVE-2026-98376
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98376.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-98376
- Downstream
- Published
- 2026-10-09T07:34:17Z
- Modified
- 2026-10-11T02:47:08Z
- Summary
- bpf: Use array_map_meta_equal for percpu array inner map replacement
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
bpf: Use array_map_meta_equal for percpu array inner map replacement
percpu_array_map_ops.map_meta_equal points to the generic bpf_map_meta_equal(), which does not compare max_entries. When a percpu array serves as an inner map, replacing it with one that has fewer max_entries bypasses the check. Since percpu_array_map_gen_lookup() inlines the original template's index_mask as a JIT immediate, a lookup on the replacement map can access pptrs[] out of bounds.
Point percpu_array_map_ops.map_meta_equal to array_map_meta_equal(), which already enforces the max_entries equality check.
Add a selftest to verify that replacing a percpu array inner map with a differently-sized one is rejected.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98376.json" }- References