Issue summary: In a server or client configuration with RFC7250 Raw Public Keys (RPKs) enabled, and only the private key (with no associated certificate) configured locally, a NULL pointer dereference may occur when the remote peer solicits raw public keys and also sends the typically omitted "signature_algorithms_cert" TLS extension. Impact summary: The impact is limited to a possible Denial of Service as a result of an application abort, no data disclosure or remote command execution are possible. CWE: CWE-476: NULL Pointer Dereference Description: While a passing comment in sample code in the documentation suggests that key-only RPK configurations are supported, the best-practice RPK configuration is to always configure a corresponding certificate (possibly self-signed or signed by any convenient CA). When the private key is configured along with a matching certificate, the "signature_algorithms_cert" extension is handled reliably even without the fix, and peer clients or servers that don't support raw public keys may be able to complete a TLS connection by pinning or verifying the corresponding certificate or its public key. Deployments that prefer to configure just a private key with no certificate need to upgrade to an updated release as noted below. FIPS impact: no No FIPS modules are affected by this issue, as the SSL protocol implementation is outside the OpenSSL FIPS module boundary.

• https://github.com/openssl/openssl/commit/1e8c398db67404babd3e5af999bb6bd86f720c76
• https://github.com/openssl/openssl/commit/581aaa0f0a35d214740f0fe1f5283ec41f1212e1
• https://github.com/openssl/openssl/commit/d0af20478688a6aa2f59d61caa3f82136b181d7f
• https://github.com/openssl/openssl/commit/dad836b071da6579510c968615848ba03cac593b
• https://openssl-library.org/news/secadv/20260825.txt

• Openssl » Openssl » Version: 3.4.0
  cpe:2.3:a:openssl:openssl:3.4.0
• Openssl » Openssl » Version: 3.4.1
  cpe:2.3:a:openssl:openssl:3.4.1
• Openssl » Openssl » Version: 3.4.2
  cpe:2.3:a:openssl:openssl:3.4.2
• Openssl » Openssl » Version: 3.4.3
  cpe:2.3:a:openssl:openssl:3.4.3
• Openssl » Openssl » Version: 3.4.4
  cpe:2.3:a:openssl:openssl:3.4.4
• Openssl » Openssl » Version: 3.4.5
  cpe:2.3:a:openssl:openssl:3.4.5
• Openssl » Openssl » Version: 3.4.6
  cpe:2.3:a:openssl:openssl:3.4.6
• Openssl » Openssl » Version: 3.5.0
  cpe:2.3:a:openssl:openssl:3.5.0
• Openssl » Openssl » Version: 3.5.1
  cpe:2.3:a:openssl:openssl:3.5.1
• Openssl » Openssl » Version: 3.5.2
  cpe:2.3:a:openssl:openssl:3.5.2
• Openssl » Openssl » Version: 3.5.3
  cpe:2.3:a:openssl:openssl:3.5.3
• Openssl » Openssl » Version: 3.5.4
  cpe:2.3:a:openssl:openssl:3.5.4
• Openssl » Openssl » Version: 3.5.5
  cpe:2.3:a:openssl:openssl:3.5.5
• Openssl » Openssl » Version: 3.5.6
  cpe:2.3:a:openssl:openssl:3.5.6
• Openssl » Openssl » Version: 3.5.7
  cpe:2.3:a:openssl:openssl:3.5.7
• Openssl » Openssl » Version: 3.6.0
  cpe:2.3:a:openssl:openssl:3.6.0
• Openssl » Openssl » Version: 3.6.1
  cpe:2.3:a:openssl:openssl:3.6.1
• Openssl » Openssl » Version: 3.6.2
  cpe:2.3:a:openssl:openssl:3.6.2
• Openssl » Openssl » Version: 3.6.3
  cpe:2.3:a:openssl:openssl:3.6.3
• Openssl » Openssl » Version: 4.0.0
  cpe:2.3:a:openssl:openssl:4.0.0