PT-2026-65346 · Go · Github.Com/Hamba/Avro/V2+1
Publicado
2026-07-27
·
Atualizado
2026-07-27
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The Avro array and map decoders loop over an attacker-controlled block-count value without checking the underlying reader's error state inside the loop body. Reader.ReadBlockHeader returns the count as a Go int, which is 64-bit on amd64 and arm64 targets. A producer can declare a block of up to math.MaxInt64 elements followed by EOF or any truncated payload, and the decoder will attempt that many no-op iterations before propagating the error.
The realistic ceiling is indefinite until the worker is killed externally. A single hostile payload pins a CPU core until the process is OOM-killed, deadline-cancelled, or terminated, resulting in a remote, unauthenticated denial-of-service.
The fix exits the loop on the first inner-decode error.
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Produtos afetados
Github.Com/Hamba/Avro/V2
Github.Com/Iskorotkov/Avro/V2