CVE-2026-123976 (GCVE-0-2026-123976)

Vulnerability from cvelistv5 – Published: 2026-11-06 17:58 – Updated: 2026-11-06 17:58
VLAI
Title
EDFbrowser before 2.16 Out-of-Bounds Write via check_edf_file() Annotation Signals
Summary
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.
Severity
6.8 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CWE
Assigner
VulnCheck CNA
References
Impacted products
Vendor Product Version
Teunis van Beelen EDFbrowser Affected: 0 , < 2.16 (custom)
Create a notification for this product.
Date Public
2026-11-05 00:00
Credits
Deus Rex
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:gitlab/teuniz/edfbrowser",
          "product": "EDFbrowser",
          "repo": "https://gitlab.com/Teuniz/EDFbrowser",
          "vendor": "Teunis van Beelen",
          "versions": [
            {
              "lessThan": "2.16",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Deus Rex"
        }
      ],
      "datePublic": "2026-11-05T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 6.8,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          },
          "format": "CVSS"
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-787",
              "description": "Out-of-bounds Write",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-06T17:58:31.600Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://gitlab.com/Teuniz/EDFbrowser/-/commit/f64cec4a22af34adb7bbdf5fec12cb3a880ddc5a"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://gitlab.com/Teuniz/EDFbrowser/-/tags/v2.16"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://gitlab.com/Teuniz/EDFbrowser/-/blob/v2.15/check_edf_file.c#L686-L708"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://gitlab.com/Teuniz/EDFbrowser/-/blob/v2.15/global.h#L250"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://gitlab.com/Teuniz/EDFbrowser"
        },
        {
          "name": "VulnCheck Advisory: EDFbrowser before 2.16 Out-of-Bounds Write via check_edf_file() Annotation Signals",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/edfbrowser-before-2.16-out-of-bounds-write-via-check-edf-file-annotation-signals"
        }
      ],
      "title": "EDFbrowser before 2.16 Out-of-Bounds Write via check_edf_file() Annotation Signals",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-123976",
    "datePublished": "2026-11-06T17:58:31.600Z",
    "dateReserved": "2026-11-06T17:54:14.114Z",
    "dateUpdated": "2026-11-06T17:58:31.600Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}



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