CVE-2025-29785: Github.com/quic go/quic go Quic-go Has Panic Vulnerability

HIGH
Advisory Identifier: GHSA-j972-j939-p2v3
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CVSS 7.5
CWE-248
Published
Advisory Summary

CVE-2025-29785 is a HIGH (CVSS 7.5) quic-go has panic vulnerability (CWE-248: Uncaught Exception) affecting Github.com/quic go/quic go libraries in the Go ecosystem. The issue involves quic-go has panic in path probe loss recovery handling. Remediation is available by upgrading affected packages to version 0.50.1.

CVE-2025-29785 at a Glance

CVE Identifier CVE-2025-29785
GHSA Identifier GHSA-j972-j939-p2v3
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-248: Uncaught Exception
Affected Product Github.com/quic go/quic go
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 7.5

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:H).

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 High (A:H)

How to Fix CVE-2025-29785

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

github.com/quic-go/quic-go fixed: 0.50.1 
Upgrade github.com/quic-go/quic-go to 0.50.1
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 github.com/quic-go/quic-go

How to Check if You Are Affected

To determine whether your application is affected by CVE-2025-29785, inspect your project dependencies for Github.com/quic go/quic go:

inspect dependencies for github.com/quic-go/quic-go

Analyze the terminal output to locate any version of Github.com/quic go/quic go in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.50.1), 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-248: Uncaught Exception, where an exception is thrown from a function, but it is not caught. In Github.com/quic go/quic go, 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

### Impact The loss recovery logic for path probe packets that was added in the v0.50.0 release can be used to trigger a nil-pointer dereference by a malicious QUIC client. In order to do so, the attacker first sends valid QUIC packets from different remote addresses (thereby triggering the newly added path validation logic: the server sends path probe packets), and then sending ACKs for packets received from the server specifically crafted to trigger the nil-pointer dereference. ### Patches v0.50.1 contains a patch that fixes the vulnerability. This release contains a test that generates random sequences of sent packets (both regular and path probe packets), that was used to verify that the patch actually covers all corner cases. ### Workarounds No. ### References This issue has been reported publicly, but without any context, in https://github.com/quic-go/quic-go/issues/4981.

CVE-2025-29785 Affected Github.com/quic go/quic go Versions

1 component(s)
Fixed Versions:
0.50.1
Product / Package Ecosystem Affected Versions Fixed Version
github.com/quic-go/quic-go
golang/github.com/quic-go/quic-go
Go
≥ 0.50.0
< 0.50.1
0.50.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/quic-go/quic-go/security/advisories/GHSA-j972-j939-p2v3
NVD — CVE-2025-29785 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-29785
Github.com/quic go/quic go Source Repository REPOSITORY
https://github.com/quic-go/quic-go/issues/4981
Security Fix Commit FIX COMMIT
https://github.com/quic-go/quic-go/commit/b90058aba5f65f48e0e150c89bbaa21a72dda4de
Github.com/quic go/quic go Source Repository REPOSITORY
https://github.com/quic-go/quic-go

Frequently Asked Questions

What is CVE-2025-29785?
CVE-2025-29785 is a security vulnerability in Github.com/quic go/quic go involving quic-go Has Panic in Path Probe Loss Recovery Handling under CWE-248: Uncaught Exception.
Which Github.com/quic go/quic go versions are affected?
Affected versions include releases prior to 0.50.1 across affected packages: github.com/quic-go/quic-go.
What version fixes CVE-2025-29785?
Upgrading to 0.50.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/quic-go/quic-go affected?
Yes, github.com/quic-go/quic-go is affected in releases prior to 0.50.1. Upgrade your dependency to 0.50.1 or later.
What is the CVSS score of CVE-2025-29785?
CVE-2025-29785 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2025-29785?
CVE-2025-29785 is classified under CWE-248: Uncaught Exception (An exception is thrown from a function, but it is not caught.).
How can I check Go dependencies for CVE-2025-29785?
Run the dependency tree command: 'inspect dependencies for github.com/quic-go/quic-go'. 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-j972-j939-p2v3",
  "modified" : "2025-06-04T20:57:25Z",
  "published" : "2025-06-03T06:09:56Z",
  "aliases" : [ "CVE-2025-29785" ],
  "summary" : "quic-go Has Panic in Path Probe Loss Recovery Handling",
  "details" : "### Impact\n\nThe loss recovery logic for path probe packets that was added in the v0.50.0 release can be used to trigger a nil-pointer dereference by a malicious QUIC client.\n\nIn order to do so, the attacker first sends valid QUIC packets from different remote addresses (thereby triggering the newly added path validation logic: the server sends path probe packets), and then sending ACKs for packets received from the server specifically crafted to trigger the nil-pointer dereference.\n\n### Patches\n\nv0.50.1 contains a patch that fixes the vulnerability.\n\nThis release contains a test that generates random sequences of sent packets (both regular and path probe packets), that was used to verify that the patch actually covers all corner cases.\n\n### Workarounds\n\nNo.\n\n### References\n\nThis issue has been reported publicly, but without any context, in https://github.com/quic-go/quic-go/issues/4981.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/quic-go/quic-go"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.50.0"
      }, {
        "fixed" : "0.50.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/quic-go/quic-go/security/advisories/GHSA-j972-j939-p2v3"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-29785"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/quic-go/quic-go/issues/4981"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/quic-go/quic-go/commit/b90058aba5f65f48e0e150c89bbaa21a72dda4de"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/quic-go/quic-go"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-248" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-06-03T06:09:56Z",
    "nvd_published_at" : "2025-06-02T11:15:21Z"
  }
}