CVE-2026-23951
SumatraPDF's Integer Underflow in PalmDbReader Leads to Crash
Vexday Risk Score
13Bajo
Decisión SSVC (CISA)
Track
Sin señal de explotación → monitorear
CVSS 5.5EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —
Ciclo de vida
22 ene 2026Publicada en NVD
Recomendación: Monitorear — sin señal de explotación por ahora.
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.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Productos afectados
sumatrapdfreader · sumatrapdf¿Quieres saber si tu infraestructura está expuesta a esto?
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