Security Advisory

CVE-2026-23951

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2026-01-22 00:17:10

Last updated 2026-01-22 21:44:27

Assigner GitHub_M

State PUBLISHED

Description

SumatraPDF is a multi-format reader for Windows. All versions contain an off-by-one error in the validation code that only triggers with exactly 2 records, causing an integer underflow in the size calculation. This bug exists in PalmDbReader::GetRecord when opening a crafted Mobi file, resulting in an out-of-bounds heap read that crashes the app. There are no published fixes at the time of publication.

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