Buffer overflow in Teunis Van Beelen Edfbrowser
CVE-2026-123976
EDFbrowser before 2.16 contains an out-of-bounds write vulnerability in check_edf_file() that allows attackers to overflow the 256-element annot_ch array by supplying excessive annotation signals. Attackers can craft an EDF+ or BDF+ file with more than 256 annotation signals to overwrite edfhdrblock members, including the signal parameter pointer, crashing the application when opened.
Vulnerability class: Buffer Overflow
Published .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- gitlab.com/Teuniz/EDFbrowser (product)
- gitlab.com/Teuniz/EDFbrowser/-/blob/v2.15/check_edf_file.c (technical-description)
- gitlab.com/Teuniz/EDFbrowser/-/blob/v2.15/global.h (technical-description)
- gitlab.com/Teuniz/EDFbrowser/-/commit/f64cec4a22af34adb7bbdf5fec12cb3a880ddc5a (patch)
- gitlab.com/Teuniz/EDFbrowser/-/tags/v2.16 (release-notes)
- VulnCheck Advisory: EDFbrowser before 2.16 Out-of-Bounds Write via check_edf_file() Annotation Signals (third-party-advisory)
Frequently asked questions
- What is CVE-2026-123976?
- CVE-2026-123976 is a medium-severity vulnerability in Teunis Van Beelen Edfbrowser, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2026-11-06.
- How severe is CVE-2026-123976?
- Medium severity. CVSS v3 base score is 5.5 out of 10.