SumatraPDF is a multi-format reader for Windows. In 3.6.1 and earlier, ChmFile::GetCharZ() narrows file-controlled unsigned string offsets from /#WINDOWS and /#IVB to signed integers without a lower-bound check. An offset that becomes negative can make the function read before the /#STRINGS buffer, causing deterministic application termination. No broader impact is claimed beyond the advisory-supported conditions. No fixed version is available as of this review.
Metrics
Affected Vendors & Products
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| Sumatrapdfreader |
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References
History
Wed, 14 Oct 2026 02:30:00 +0000
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| Metrics |
ssvc
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Thu, 08 Oct 2026 23:30:00 +0000
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| First Time appeared |
Sumatrapdfreader
Sumatrapdfreader sumatrapdf |
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| Vendors & Products |
Sumatrapdfreader
Sumatrapdfreader sumatrapdf |
Thu, 08 Oct 2026 22:45:00 +0000
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| Description | SumatraPDF is a multi-format reader for Windows. In 3.6.1 and earlier, ChmFile::GetCharZ() narrows file-controlled unsigned string offsets from /#WINDOWS and /#IVB to signed integers without a lower-bound check. An offset that becomes negative can make the function read before the /#STRINGS buffer, causing deterministic application termination. No broader impact is claimed beyond the advisory-supported conditions. No fixed version is available as of this review. | |
| Title | SumatraPDF: Untrusted binary record offset used without lower-bound validation | |
| Weaknesses | CWE-125 | |
| References |
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| Metrics |
cvssV4_0
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MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-10-08T22:35:30.475Z
Updated: 2026-10-14T01:36:13.121Z
Reserved: 2026-10-08T17:21:52.977Z
Link: CVE-2026-107738
Vulnrichment
Updated: 2026-10-14T01:36:08.347Z
NVD
Status : Deferred
Published: 2026-10-08T23:16:59.970
Modified: 2026-10-14T02:16:58.240
Link: CVE-2026-107738
Redhat
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