CVE-2026-28390 Issue summary: During processing of a crafted CMS EnvelopedData message with KeyTransportRecipientInfo a NULL pointer…
Description
Issue summary: During processing of a crafted CMS EnvelopedData message with KeyTransportRecipientInfo a NULL pointer dereference can happen. Impact summary: Applications that process attacker-controlled CMS data may crash before authentication or cryptographic operations occur resulting in Denial of Service. When a CMS EnvelopedData message that uses KeyTransportRecipientInfo with RSA-OAEP encryption is processed, the optional parameters field of RSA-OAEP SourceFunc algorithm identifier is examined without checking for its presence. This results in a NULL pointer dereference if the field is missing. Applications and services that call CMS_decrypt() on untrusted input (e.g., S/MIME processing or CMS-based protocols) are vulnerable. The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the affected code is outside the OpenSSL FIPS module boundary.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| OpenSSL 3.6 | 3.6.0 → < 3.6.2 | 3.6.2 |
| OpenSSL 3.5 | 3.5.0 → < 3.5.6 | 3.5.6 |
| OpenSSL 3.4 | 3.4.0 → < 3.4.5 | 3.4.5 |
| OpenSSL 3.3 | 3.3.0 → < 3.3.7 | 3.3.7 |
| OpenSSL 3.0 | 3.0.0 → < 3.0.20 | 3.0.20 |
| OpenSSL 1.1 | earliest → < 1.1.1zg | 1.1.1zg |
| OpenSSL 1.0 | earliest → < 1.0.2zp | 1.0.2zp |
| SIMATIC CN 4100 5.0 | earliest → < 5.0 | 5.0 |
| SIMATIC S7-1500 TM MFP - GNU/Linux subsystem | Versions not published |
References
- OpenSSL Advisory openssl-library.org
- 3.6.2 git commit github.com
- 3.5.6 git commit github.com
- 3.4.5 git commit github.com
- 3.3.7 git commit github.com
- 3.0.20 git commit github.com
Timeline
- Published
- Last modified