Teunis van Beelen EDFbrowser up to 2.15 check_edf_file out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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4.6$0-$5k0.42+

Summaryinfo

A vulnerability was found in Teunis van Beelen EDFbrowser up to 2.15. It has been rated as problematic. This vulnerability affects the function check_edf_file. This manipulation causes out-of-bounds write. This vulnerability is handled as CVE-2026-123976. It is possible to launch the attack on the local host. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Teunis van Beelen EDFbrowser up to 2.15. It has been declared as problematic. Affected by this vulnerability is the function check_edf_file. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect integrity, and availability. The summary by CVE is:

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.

The advisory is shared at gitlab.com. This vulnerability is known as CVE-2026-123976 since 11/06/2026. The exploitation appears to be easy. An attack has to be approached locally. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available.

Upgrading to version 2.16 eliminates this vulnerability. Applying the patch f64cec4a22af34adb7bbdf5fec12cb3a880ddc5a is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.7
VulDB Meta Temp Score: 4.6

VulDB Base Score: 3.9
VulDB Temp Score: 3.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.5
CNA Vector (VulnCheck): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: EDFbrowser 2.16
Patch: f64cec4a22af34adb7bbdf5fec12cb3a880ddc5a

Timelineinfo

11/06/2026 Advisory disclosed
11/06/2026 +0 days CVE reserved
11/06/2026 +0 days VulDB entry created
11/06/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: gitlab.com
Status: Confirmed

CNA: VulnCheck
CVE: CVE-2026-123976 (🔒)

GCVE (CVE): GCVE-0-2026-123976
GCVE (VulDB): GCVE-100-432061

Entryinfo

Created: 11/06/2026 19:13
Changes: 11/06/2026 19:13 (76)
Complete: 🔍
Cache ID: 216::103

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