CVE-2025-69277: libsodium before ad3004e, in atypical use cases involving certain custom cryptography or untrusted data to crypto_core_ed25519_is_valid_point, mishandles checks for whether an elliptic curve point is valid because it sometimes allows points that aren't in the main cryptographic group.
CVE-2025-69277 is a vulnerability in libsodium before ad3004e, in atypical use cases involving certain custom cryptography or untrusted data to crypto_core_ed25519_is_valid_point, mishandles checks for whether an elliptic curve point is valid because it sometimes allows points that aren't in the main cryptographic group., rated Moderate by Microsoft, with a CVSS 3.1 base score of 4.5 (Medium). An attacker can exploit it by an attacker with local access, without any privileges and without user interaction. Microsoft has not reported exploitation in the wild. The EPSS model estimates a 0.18% probability of exploitation activity in the next 30 days, higher than 8% of all scored vulnerabilities. Microsoft released the fix on 3 January 2026 in the December 2025 Patch Tuesday. It affects 4 products in 1 product family (Open Source Software).
Key facts
- CVE ID
- CVE-2025-69277
- Severity
- Medium CVSS 4.5
- Microsoft severity
- Moderate
- Exploited in the wild
- No
- Publicly disclosed
- No
- Weakness
- CWE-184
- EPSS
- 0.18% (percentile 8%)
- CISA KEV
- Not listed
- Released
- Last updated
- Patch Tuesday
- December 2025 Patch Tuesday
- Product families
- Open Source Software
CVSS score and vector
Microsoft scores CVE-2025-69277 at 4.5 (temporal 4.1) using CVSS 3.1. Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N/E:U
| Metric | Value |
|---|---|
| Attack vector | Local |
| Attack complexity | High |
| Privileges required | None |
| User interaction | None |
| Scope | Changed |
| Confidentiality impact | Low |
| Integrity impact | Low |
| Availability impact | None |
| Exploit code maturity | Unproven |
Affected products (4)
Open Source Software
| Product | Security update | Type | Fixed build | Restart |
|---|---|---|---|---|
| azl3 libsodium 1.0.19-1 on Azure Linux 3.0 | CBL-Mariner Releases | Security Update | 1.0.19-2 | No |
| cbl2 libsodium 1.0.18-6 on CBL Mariner 2.0 | CBL-Mariner Releases | Security Update | 1.0.18-7 | No |
| azl3 libsodium 1.0.19-2 on Azure Linux 3.0 | CBL-Mariner Releases | Security Update | 1.0.19-2 | No |
| cbl2 libsodium 1.0.18-7 on CBL Mariner 2.0 | CBL-Mariner Releases | Security Update | 1.0.18-7 | No |
NIST NVD data
- NVD status
- Deferred
- NVD CVSS
- 4.5 (MEDIUM)
- NVD weakness
- CWE-184
- Published to NVD
- NVD last modified
References
- https://00f.net/2025/12/30/libsodium-vulnerability/
- https://github.com/jedisct1/libsodium/commit/ad3004ec8731730e93fcfbbc824e67eadc1c1bae
- https://github.com/pyca/pynacl/commit/96314884d88d1089ff5f336dba61d7abbcddbbf7
- https://github.com/pyca/pynacl/commit/ecf41f55a3d8f1e10ce89c61c4b4d67f3f4467cf
- https://github.com/pyca/pynacl/issues/920
- https://ianix.com/pub/ed25519-deployment.html
- https://news.ycombinator.com/item?id=46435614
- https://lists.debian.org/debian-lts-announce/2026/01/msg00004.html
Revision history
| Version | Date | Description |
|---|---|---|
| 1.0 | Information published. | |
| 2.0 | Information published. | |
| 3.0 | Information published. | |
| 4.0 | Information published. | |
| 5.0 | Information published. |