PT-2026-64575 · Linux · Linux
CVE-2026-64354
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Publicado
2026-07-25
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Atualizado
2026-07-25
Nenhuma
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In the Linux kernel, the following vulnerability has been resolved:
bpf: Validate BTF repeated field counts before expansion
btf parse struct metas() walks user-supplied BTF during BPF BTF LOAD,
and btf repeat fields() expands repeatable fields from array elements
into the fixed BTF FIELDS MAX scratch array used by btf parse fields().
The remaining-capacity check performs the expanded field count calculation
in u32. A malformed BTF can wrap that calculation, causing the check to
pass even when the expanded field count exceeds the scratch array
capacity. The following memcpy() can then write past the end of the
array.
Use checked addition and multiplication before copying repeated fields
and reject impossible counts.
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