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CVE-2026-25920

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

Description (CNA)

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 (CNA)

Vendor / productVersions
sumatrapdfreader / sumatrapdfaffected <= 3.5.2

CWE

CWE-125

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.