CVE-2026-23951
5.5
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Exploitability: 1.8 / Impact: 3.6
Source: security-advisories@github.com (Secondary)
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.
Affected (1)
Products: Sumatrapdfreader: Sumatrapdf
Configuration A
| Vulnerable Software | Affected Versions |
|---|---|
| All versions |
Related CWEs
CWE-125
Out-of-bounds Read
The product reads data past the end, or before the beginning, of the intended buffer.
CWE-191
Integer Underflow (Wrap or Wraparound)
The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.
CWE-193
Off-by-one Error
A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.
References (2)
Source: security-advisories@github.com
Product
Source: security-advisories@github.com
ExploitVendor Advisory
Timeline
No history available yet.