Reachable Assertion Affecting q package, versions <0.19.9-r1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.11% (25th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-Q-13534346
  • published12 Oct 2025
  • disclosed10 Oct 2025

Introduced: 10 Oct 2025

CVE-2025-59530  (opens in a new tab)
CWE-617  (opens in a new tab)
CWE-755  (opens in a new tab)

How to fix?

Upgrade Chainguard q to version 0.19.9-r1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream q package and not the q package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

quic-go is an implementation of the QUIC protocol in Go. In versions prior to 0.49.0, 0.54.1, and 0.55.0, a misbehaving or malicious server can cause a denial-of-service (DoS) attack on the quic-go client by triggering an assertion failure, leading to a process crash. This requires no authentication and can be exploited during the handshake phase. This was observed in the wild with certain server implementations. quic-go needs to be able to handle misbehaving server implementations, including those that prematurely send a HANDSHAKE_DONE frame. Versions 0.49.0, 0.54.1, and 0.55.0 discard Initial keys when receiving a HANDSHAKE_DONE frame, thereby correctly handling premature HANDSHAKE_DONE frames.

CVSS Base Scores

version 3.1