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CVE PROGRAM SOURCE RECORD5.5 Medium

CVE-2026-25920

SumatraPDF has a heap out-of-bounds read in MOBI HuffDic decompressor

Description

SumatraPDF is a multi-format reader for Windows. In 3.5.2 and earlier, a heap out-of-bounds read vulnerability exists in SumatraPDF's MOBI HuffDic decompressor. The bounds check in AddCdicData() only validates half the range that DecodeOne() actually accesses. Opening a crafted .mobi file can read nearly (1 << codeLength) bytes beyond the CDIC dictionary buffer, leading to a crash.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

sumatrapdfreader sumatrapdf

  • <= 3.5.2affected

References