CVE-2025-52939
Potential heap-buffer overflow vulnerability in NotepadNext
Out-of-bounds Write vulnerability in dail8859 NotepadNext (src/lua/src modules). This vulnerability is associated with program files ldebug.C, lvm.C.
This issue affects NotepadNext: through v0.11.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Potential heap-buffer overflow vulnerability in NotepadNext
Out-of-bounds Write vulnerability in dail8859 NotepadNext (src/lua/src modules). This vulnerability is associated with program files ldebug.C, lvm.C.
This issue affects NotepadNext: through v0.11.
- Record
CVE-2025-52939- CVSS 4.0
- 9.4 Critical
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/S:N/AU:Y/R:U/V:C/RE:M/U:Red - Weakness
- CWE-787
- Updated
- 2026-11-02
EUVDEUVD-2025-18873
Out-of-bounds Write vulnerability in dail8859 NotepadNext (src/lua/src modules). This vulnerability is associated with program files ldebug.C, lvm.C.
This issue affects NotepadNext: through v0.11.
- Record
EUVD-2025-18873- CVSS 4.0
- 9.4 Critical
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/S:N/AU:Y/R:U/V:C/RE:M/U:Red - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-hhj4-3c38-ppmf
Out-of-bounds Write vulnerability in dail8859 NotepadNext (src/lua/src modules). This...
Out-of-bounds Write vulnerability in dail8859 NotepadNext (src/lua/src modules). This vulnerability is associated with program files ldebug.C, lvm.C.
This issue affects NotepadNext: through v0.11.
- Record
GHSA-hhj4-3c38-ppmf- CVSS 4.0
- 9.4 Critical
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:Y/R:U/V:C/RE:M/U:Red - Weakness
- CWE-787
- Updated
- 2026-11-02
NVD
Out-of-bounds Write vulnerability in dail8859 NotepadNext (src/lua/src modules). This vulnerability is associated with program files ldebug.C, lvm.C.
This issue affects NotepadNext: through v0.11.
- Record
CVE-2025-52939- CVSS 4.0
- 9.4 Critical
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:Y/R:U/V:C/RE:M/U:Red - Weakness
- CWE-787
- Updated
- 2026-11-02
OSV
Potential heap-buffer overflow vulnerability in NotepadNext
Out-of-bounds Write vulnerability in dail8859 NotepadNext (src/lua/src modules). This vulnerability is associated with program files ldebug.C, lvm.C.
This issue affects NotepadNext: through v0.11.
- Record
CVE-2025-52939- CVSS 4.0
- 9.4 Critical
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/S:N/AU:Y/R:U/V:C/RE:M/U:Red - Weakness
- CWE-787
- Updated
- 2026-11-02
OSVAZL-64404 No score
CVE-2025-52939 affecting package ceph for versions less than 16.2.10-8
Out-of-bounds Write vulnerability in dail8859 NotepadNext (src/lua/src modules). This vulnerability is associated with program files ldebug.C, lvm.C.
This issue affects NotepadNext: through v0.11.
- Record
AZL-64404- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
cephAzure Linux:2 |
before 16.2.10-8 | 16.2.10-8 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-52939 is a critical vulnerability (CVSS 9.4) in Dail8859 Notepadnext, published June 23, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.18%, the 6th percentile. Fixed in ceph 16.2.10-8.
References
github.com/dail8859/NotepadNext/pull/757/files
nvd.nist.gov/vuln/detail/CVE-2025-52939