CVE-2025-22866

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

MEDIUM

CVSS Score

Published: February 6, 2025 at 04:54 PM UTC

Updated: June 17, 2026 at 08:50 AM UTC

1 product affected across 1 vendorGo

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Severity

MEDIUM4

Exploit prediction

EPSS 0.3%

SSVC

No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Go · Go Standard Librarygo

60%

v < 1.22.121.23.0-0 ≤ v < 1.23.61.24.0-0 ≤ v < 1.24.0-rc.31.23.0-0 1.24.0-0

Affected range stops below 1.22.12, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.23.6, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.24.0-rc.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (5)

Source: [email protected]

https://go.dev/cl/643735

Source: [email protected]

https://go.dev/issue/71383

Source: [email protected]

https://groups.google.com/g/golang-announce/c/xU1ZCHUZw3k

Source: [email protected]

https://pkg.go.dev/vuln/GO-2025-3447

Source: af854a3a-2127-422b-91ae-364da2661108

https://security.netapp.com/advisory/ntap-20250221-0002/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4MEDIUMCISA-ADP

Attack Vector: LOCAL
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: LOW
Integrity: NONE
Availability: NONE

Vector?

Quick Info

StatusDEFERRED

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