In checkmapfunc_compatibility of verifier.c, there is a possible way to escalate privileges due to type confusion. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
{ "vanir_signatures": [ { "digest": { "threshold": 0.9, "line_hashes": [ "15371768363011398948134392204682119057", "268699932613652902180405491950515855539", "228354794961783121942231163916749470200", "248489427563718735253355314142042363286", "212508327797180963645215052490574560327", "65854336413834867826726423728848597359", "75361136359227556588278444359324605212", "130310085127283080999774999963555185597", "48210965307352011666908275781782046531" ] }, "id": "PUB-A-217307370-1848d9ea", "source": "https://android.googlesource.com/kernel/common/+/5b029a32cfe4600f5e10e36b41778506b90fd4de", "deprecated": false, "signature_version": "v1", "target": { "file": "kernel/bpf/verifier.c" }, "signature_type": "Line" }, { "digest": { "length": 5443.0, "function_hash": "293654774779956045482460113655615237214" }, "id": "PUB-A-217307370-6df1b1e7", "source": "https://android.googlesource.com/kernel/common/+/5b029a32cfe4600f5e10e36b41778506b90fd4de", "deprecated": false, "signature_version": "v1", "target": { "file": "kernel/bpf/verifier.c", "function": "check_map_func_compatibility" }, "signature_type": "Function" } ], "fixes": [ "https://android.googlesource.com/kernel/common/+/5b029a32cfe4600f5e10e36b41778506b90fd4de" ], "spl": "2022-04-05", "severity": "Moderate", "types": [ "EoP" ] }