CVE-2026-25920 - SumatraPDF has a heap out-of-bounds read in MOBI HuffDic decompressor

CVE-2026-25920 - SumatraPDF has a heap out-of-bounds read in MOBI HuffDic decompressor

https://cvefeed.io/rssfeed/latest.atom / Tue, 02/10/2026 - 05:01
CVE ID : CVE-2026-25920
Published : Feb. 9, 2026, 10:16 p.m. | 4 hours, 4 minutes ago
Description : SumatraPDF is a multi-format reader for Windows. In 3.5.2 and earlier, tA 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.
Severity: 5.5 | MEDIUM
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Kenya Education Network CERT(KENET-CERT) is a Cybersecurity Emergency Response Team and Co-ordination Center operated by the National Research and Education Network of Kenya. KENET-CERT coordination center promotes awareness on cybersecurity incidences as well as coordinates and assists member institutions in responding effectively to cyber security threats and incidences. KENET-CERT works closely with Kenya's National CIRT coordination center (CIRT/CC) as a sector CIRT for the academic institutions. KENET promotes use of ICT in Teaching, Learning and Research in Higher Education Institutions in Kenya. KENET aims to interconnect all the Universities, Tertiary and Research Institutions in Kenya by setting up a cost effective and sustainable private network with high speed access to the global Internet. KENET also facilitates electronic communication among students and faculties in member institutions, share learning and teaching resources by collaboration in Research and Development of Educational content.