Compress/s2: Integer Overflow or Wraparound and Out-of-bounds Write in compress

影響: go:github.com/klauspost/compress <= 1.18.6 → 1.18.7

Signed Integer Overflow in s2.NewDict Summary A signed integer overflow vulnerability in s2.NewDict() allows an attacker to bypass repeat index validation by supplying a dictionary with a uvarint-encoded repeat value exceeding MaxInt64. When Dict.Encode() is subsequently called, the overflowed negative repeat value causes an out-of-bounds memory access via unsafe.Pointer arithmetic, crashing the process with SIGSEGV. Package - Name: github.com/klauspost/compress/s2 - Ecosystem: Go - Affected ve…

GitHub Advisory Databaseで読む

2026/10/20 23:33、GitHub Advisory Databaseが「Compress/s2: Integer Overflow or Wraparound and Out-of-bounds Write in compress」を公開しました (種別: 脆弱性アドバイザリ)。重大度は「重要」(high) です。関連する技術: Go、GitHub。CVE: CVE-2026-63209。