Report: Ultimate Guide: CVE-2026-46384 - iskorotkov/avro: Integer Overflow in Avro Decoder

Report: Ultimate Guide: CVE-2026-46384 - iskorotkov/avro: Integer Overflow in Avro Decoder

CVE ID :CVE-2026-46384 Published : May 29, 2026, 8:16 p.m. | 45 minutes ago Description :iskorotkov/avro is a fast Go Avro codec. Prior to 2.33.0, several Avro decoder paths read attacker-controlled 64-bit values from the wire format and either narrowed them to platform-sized int before bounds-checking, or summed them with overflow-prone signed-int arithmetic. On 32-bit targets (GOARCH=386, arm, mips, wasm, etc.), the truncation paths can silently bypass byte-slice limits, select the wrong union branch, or hit the OCF negative-make panic via wrap. Three sub-issues are not 32-bit-specific: cumulative-size arithmetic overflow in arrayDecoder.Decode / mapDecoder.Decode / mapDecoderUnmarshaler.Decode (wraps at math.MaxInt64 on amd64 / arm64 and bypasses MaxSliceAllocSize / MaxMapAllocSize), math.MinInt negation in block-header handling, and make([]byte, size) with a negative size in OCF block reads — all three panic or bypass caps on any platform, giving an attacker a denial-of-service primitive there. This vulnerability is fixed in 2.33.0. Severity: 8.7 | HIGH Visit the link for more details, such as CVSS details, affected products, timeline, and more...

CVE Details

Severity
HIGH
Published
May 29, 2026