Vulnerability Description
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.
References
- https://git.kernel.org/stable/c/28d5f20ed022ade0fb0bfbf50b78fec782083175
- https://git.kernel.org/stable/c/373a1e9366e711b89bc5e45bd6edf33ef62402cd
- https://git.kernel.org/stable/c/cec97102d4147e18568c93946014c4c8ebf86fcf
- https://git.kernel.org/stable/c/f08619f060468076e4acbdc10e0713af20d60e65
FAQ
What is CVE-2026-92515?
CVE-2026-92515 is a documented vulnerability. 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 d...
How severe is CVE-2026-92515?
CVSS scoring is not yet available for CVE-2026-92515. Check NVD for updates.
Is there a patch for CVE-2026-92515?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.