CVE-2025-22866

Timing sidechannel for P-256 on ppc64le in crypto/internal/nistec

Description

Due to the usage of a variable time instruction in the assembly implementation of an internal function, a small number of bits of secret scalars are leaked on the ppc64le architecture. Due to the way this function is used, we do not believe this leakage is enough to allow recovery of the private key when P-256 is used in any well known protocols.

4.0

CVSS

Severity: Medium

CVSS 3.1 •

EPSS 0.01%

Affected: Go standard library crypto/internal/nistec

References

Link	Tags
https://go.dev/cl/643735
https://go.dev/issue/71383
https://groups.google.com/g/golang-announce/c/xU1ZCHUZw3k
https://pkg.go.dev/vuln/GO-2025-3447
https://security.netapp.com/advisory/ntap-20250221-0002/

Frequently Asked Questions

What is the severity of CVE-2025-22866?: CVE-2025-22866 has been scored as a medium severity vulnerability.
How to fix CVE-2025-22866?: To fix CVE-2025-22866, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-22866 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2025-22866 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-22866?: CVE-2025-22866 affects Go standard library crypto/internal/nistec.

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