CVE-2026-42859
- Source
- https://cve.org/CVERecord?id=CVE-2026-42859
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42859.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-42859
- Aliases
-
- GHSA-567c-gpv8-qh9h
- Downstream
- Published
- 2026-05-11T17:36:08.143Z
- Modified
- 2026-07-08T08:13:28.549692071Z
- Severity
-
- 8.1 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U CVSS Calculator
- Summary
- Neat VNC: Buffer overflow due to oversized RSA public keys
- Details
-
Neat VNC is a VNC server library. Prior to 0.9.6, a pre-authentication stack buffer overflow exists in neatvnc in the RSA-AES security type handler. An unauthenticated remote attacker who can reach the VNC listening socket can send a crafted security type 5 (RSA-AES) or security type 129 (RSA-AES-256) handshake with an oversized client RSA public key, causing rsaaessend_challenge in src/auth/rsa-aes.c to overflow a 1024-byte on-stack buffer when encrypting the server challenge. This results in at least a denial of service via server crash. This vulnerability is fixed in 0.9.6.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42859.json", "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-120" ] }- References