CVE-2026-9267
Eclipse tinydtls before commit b3efd41ad111a4920f599f51ffa4f5e9f1e72221 contains an out-of-bounds read vulnerability in the check_server_certificate() function that allows unauthenticated attackers to trigger reads beyond valid buffer boundaries by crafting a Certificate handshake message with a specific fragment_length value. Attackers can exploit missing buffer length validation before uint24 reads, memcmp, and memcpy operations during DTLS epoch 0 on both client and server paths to cause denial of service on memory-constrained devices.
- Score
- CVSS 4.0 6.9 Medium
- Status
- Deferred - emo@eclipse.org
- Published
- 2026-06-29
- Last modified
- 2026-10-25
- Weaknesses
- CWE-125
Affected products
References
- https://gitlab.eclipse.org/security/cve-assignment/-/work_items/112
