Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: bpf: Preserve unique-field state across nested structs btf_find_struct_field() initializes a fresh seen mask for every recursive descent. Unique special fields in different levels of the same aggregate therefore do not see one another. The duplicate fields can reach btf_parse_fields(), where they trigger an invariant WARN_ON_ONCE(). A crafted user BTF can consequently trigger the warning before map creation checks capabilities. Initialize the seen mask once in btf_find_field() and pass the same pointer through struct, datasec, and nested-struct walks. This gives the entire field traversal one shared uniqueness state.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 64e8ee814819f21beeeda00d4119221443d77992 before cec97102d4147e18568c93946014c4c8ebf86fcf; affected 64e8ee814819f21beeeda00d4119221443d77992 before 28d5f20ed022ade0fb0bfbf50b78fec782083175; affected 64e8ee814819f21beeeda00d4119221443d77992 before 373a1e9366e711b89bc5e45bd6edf33ef62402cd; affected 64e8ee814819f21beeeda00d4119221443d77992 before f08619f060468076e4acbdc10e0713af20d60e65 |
| Linux / Linux | affected 6.11; unaffected 0 before 6.11; unaffected 6.12.110 through 6.12.*; unaffected 6.18.52 through 6.18.*; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.