CVE-2026-92515bpf: Preserve unique-field state across nested structs
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 64e8ee814819f21beeeda00d4119221443d77992 before cec97102d4147e18568c93946014c4c8ebf86fcf; 64e8ee814819f21beeeda00d4119221443d77992 builds before 28d5f20ed022ade0fb0bfbf50b78fec782083175; from 64e8ee814819f21beeeda00d4119221443d77992 before 373a1e9366e711b89bc5e45bd6edf33ef62402cd; from 64e8ee814819f21beeeda00d4119221443d77992 before f08619f060468076e4acbdc10e0713af20d60e65 | CNA record |
References
- https://git.kernel.org/stable/c/cec97102d4147e18568c93946014c4c8ebf86fcf
- https://git.kernel.org/stable/c/28d5f20ed022ade0fb0bfbf50b78fec782083175
- https://git.kernel.org/stable/c/373a1e9366e711b89bc5e45bd6edf33ef62402cd
- https://git.kernel.org/stable/c/f08619f060468076e4acbdc10e0713af20d60e65
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.