# CVE-2023-49295: golang-github-lucas-clemente-quic-go: quic-go is an implementation of the QUIC protocol (RFC 9000, RFC 9001, RFC 9002) in Go

CVE-2023-49295 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2023-49295, released January 10, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-49295
- Priority: Routine
- CVSS: 6.5 (medium)
- EPSS: 0.0120
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 10, 2024

## Description

quic-go is an implementation of the QUIC protocol (RFC 9000, RFC 9001, RFC 9002) in Go. An attacker can cause its peer to run out of memory sending a large number of PATH_CHALLENGE frames. The receiver is supposed to respond to each PATH_CHALLENGE frame with a PATH_RESPONSE frame. The attacker can prevent the receiver from sending out (the vast majority of) these PATH_RESPONSE frames by collapsing the peers congestion window (by selectively acknowledging received packets) and by manipulating the peer's RTT estimate. This vulnerability has been patched in versions 0.37.7, 0.38.2 and 0.39.4.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | dnscrypt-proxy opensuse-leap 16.0 | 2.1.16-bp160.1.1 | [OPENSUSE-RU-2026:21160-1](https://patchblox.com/security/data/fix/linux/opensuse-ru-2026-21160-1.md) | Jun 25, 2026 |
| Linux | golang-github-lucas-clemente-quic-go Debian 13.5 (trixie) | 0.38.2-1 | [DEBIAN-CVE-2023-49295](https://patchblox.com/security/data/fix/linux/debian-cve-2023-49295.md) | Jan 10, 2024 |
| Linux | golang-github-lucas-clemente-quic-go Debian 14 | 0.38.2-1 | [DEBIAN-CVE-2023-49295](https://patchblox.com/security/data/fix/linux/debian-cve-2023-49295.md) | Jan 10, 2024 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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