CVE-2026-23951

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 ...

CVE-2026-23951: Out-of-bounds Read

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 ...

PT-2026-3887

Name of the Vulnerable Software and Affected Versions SumatraPDF affected versions not specified Description SumatraPDF, a multi-format reader for Windows, contains an off-by-one error in the validation code that triggers only with exactly two records. This error causes an integer underflow in th...