CVE-2026-46385 - iskorotkov/avro: CPU Exhaustion in Avro Decoder

CVE-2026-46385 - iskorotkov/avro: CPU Exhaustion in Avro Decoder

https://cvefeed.io/rssfeed/latest.atom / Sat, 05/30/2026 - 02:26
CVE ID :CVE-2026-46385
Published : May 29, 2026, 8:16 p.m. | 2 hours, 45 minutes ago
Description :iskorotkov/avro is a fast Go Avro codec. Prior to 2.33.0, the Avro array and map decoders looped 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 / arm64 targets — so a producer can declare a block of up to math.MaxInt64 (~9.2 × 10¹⁸) 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. Remote, unauthenticated denial-of-service. This vulnerability is fixed in 2.33.0.
Severity: 8.7 | HIGH
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