crypto: atmel-ecc - reject hardware ECDH without a public key

Summary

In the Linux kernel, the following vulnerability has been resolved: crypto: atmel-ecc - reject hardware ECDH without a public key The hardware ECDH path in atmel_ecdh_compute_shared_secret() uses the private key stored in the device. However, the public key is cached only after atmel_ecdh_set_secret() successfully generated that private key for the current tfm. atmel_ecdh_generate_public_key() already rejects requests when no public key is cached. Add the same check to atmel_ecdh_compute_shared_secret() to prevent the device from using a private key that was not generated for the current tfm.

Timeline

1. Sep 17, 2026, 4:11 PM UTCCVE published
2. Oct 19, 2026, 9:06 AM UTCRecord last updated

Affected versions

• Linux Linux

  From 11105693fa05f499532b330da65c78ff93ed4440 · fixed in 5e33791dfcc6459e402a524669093cd953d5b2df; From 11105693fa05f499532b330da65c78ff93ed4440 · fixed in 33241f198287960bba5fc2251400896762650bfa; From 11105693fa05f499532b330da65c78ff93ed4440 · fixed in 3ea8b780d68f02fe235c5051ce8ac4b4940b9259; From 11105693fa05f499532b330da65c78ff93ed4440 · fixed in 6457162f74f45284ade2da644a4f0c54758ac0a6; From 11105693fa05f499532b330da65c78ff93ed4440 · fixed in 2b40bab362d2b598f34e5ccd4694cedc3c2553d4; From 11105693fa05f499532b330da65c78ff93ed4440 · fixed in e64d6f1aae8c837cb3f0446bf44108226d7370f4; From 11105693fa05f499532b330da65c78ff93ed4440 · fixed in add28e9988902d29ea93f4869280b4a16a049ea5; From 11105693fa05f499532b330da65c78ff93ed4440 · fixed in f240f9b588f4e2de89822adebf560a96b5d263ed

• Linux Linux

  4.14

• KernelLinux

  From 4.14.0 · fixed in 5.10.270; From 5.11.0 · fixed in 5.15.221; From 5.16.0 · fixed in 6.1.188; From 6.2.0 · fixed in 6.6.157; From 6.7.0 · fixed in 6.12.110; From 6.13.0 · fixed in 6.18.52; From 6.19.0 · fixed in 7.2.6

References 8