CVE-2025-47914: Golang.org/x/crypto Golang.org/x/crypto/ssh/agent Vulnerable To Panic If Vulnerability

MODERATE
Advisory Identifier: GHSA-f6x5-jh6r-wrfv
Share
CVSS 5.3
CWE-125
Published
Advisory Summary

CVE-2025-47914 is a MODERATE (CVSS 5.3) golang.org/x/crypto/ssh/agent vulnerable to panic if vulnerability (CWE-125: Out-of-bounds Read) affecting Golang.org/x/crypto libraries in the Go ecosystem. The issue involves golang.org/x/crypto/ssh/agent vulnerable to panic if message is malformed due to out of bounds read. Remediation is available by upgrading affected packages to version 0.45.0.

CVE-2025-47914 at a Glance

CVE Identifier CVE-2025-47914
GHSA Identifier GHSA-f6x5-jh6r-wrfv
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-125: Out-of-bounds Read
Affected Product Golang.org/x/crypto
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 5.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability Low (A:L)

How to Fix CVE-2025-47914

To remediate this vulnerability, upgrade all affected Golang.org/x/crypto dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

golang.org/x/crypto fixed: 0.45.0 
Upgrade golang.org/x/crypto to 0.45.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for golang.org/x/crypto

How to Check if You Are Affected

To determine whether your application is affected by CVE-2025-47914, inspect your project dependencies for Golang.org/x/crypto:

inspect dependencies for golang.org/x/crypto

Analyze the terminal output to locate any version of Golang.org/x/crypto in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.45.0), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-125: Out-of-bounds Read, where the product reads data past the end, or before the beginning, of the intended buffer. In Golang.org/x/crypto, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

SSH Agent servers do not validate the size of messages when processing new identity requests, which may cause the program to panic if the message is malformed due to an out of bounds read.

CVE-2025-47914 Affected Golang.org/x/crypto Versions

1 component(s)
Fixed Versions:
0.45.0
Product / Package Ecosystem Affected Versions Fixed Version
golang.org/x/crypto
golang/golang.org/x/crypto
Go
< 0.45.0
0.45.0

References

go.dev/cl/721960 WEB
https://go.dev/cl/721960
NVD — CVE-2025-47914 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-47914
go.dev/issue/76364 WEB
https://go.dev/issue/76364
go.googlesource.com/crypto WEB
https://go.googlesource.com/crypto
groups.google.com/g/golang-announce/c... WEB
https://groups.google.com/g/golang-announce/c/w-oX3UxNcZA
pkg.go.dev/vuln/go-2025-4135 WEB
https://pkg.go.dev/vuln/GO-2025-4135

Frequently Asked Questions

What is CVE-2025-47914?
CVE-2025-47914 is a security vulnerability in Golang.org/x/crypto involving golang.org/x/crypto/ssh/agent vulnerable to panic if message is malformed due to out of bounds read under CWE-125: Out-of-bounds Read.
Which Golang.org/x/crypto versions are affected?
Affected versions include releases prior to 0.45.0 across affected packages: golang.org/x/crypto.
What version fixes CVE-2025-47914?
Upgrading to 0.45.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is golang.org/x/crypto affected?
Yes, golang.org/x/crypto is affected in releases prior to 0.45.0. Upgrade your dependency to 0.45.0 or later.
What is the CVSS score of CVE-2025-47914?
CVE-2025-47914 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
What CWE is associated with CVE-2025-47914?
CVE-2025-47914 is classified under CWE-125: Out-of-bounds Read (The product reads data past the end, or before the beginning, of the intended buffer.).
How can I check Go dependencies for CVE-2025-47914?
Run the dependency tree command: 'inspect dependencies for golang.org/x/crypto'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-f6x5-jh6r-wrfv",
  "modified" : "2025-11-20T16:35:18Z",
  "published" : "2025-11-19T23:16:40Z",
  "aliases" : [ "CVE-2025-47914" ],
  "summary" : "golang.org/x/crypto/ssh/agent vulnerable to panic if message is malformed due to out of bounds read",
  "details" : "SSH Agent servers do not validate the size of messages when processing new identity requests, which may cause the program to panic if the message is malformed due to an out of bounds read.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "golang.org/x/crypto"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.45.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-47914"
  }, {
    "type" : "WEB",
    "url" : "https://go.dev/cl/721960"
  }, {
    "type" : "WEB",
    "url" : "https://go.dev/issue/76364"
  }, {
    "type" : "WEB",
    "url" : "https://go.googlesource.com/crypto"
  }, {
    "type" : "WEB",
    "url" : "https://groups.google.com/g/golang-announce/c/w-oX3UxNcZA"
  }, {
    "type" : "WEB",
    "url" : "https://pkg.go.dev/vuln/GO-2025-4135"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-125" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-11-19T23:16:40Z",
    "nvd_published_at" : "2025-11-19T21:15:50Z"
  }
}