quic-go Has Panic in Path Probe Loss Recovery Handling
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-248.
Summary
quic-go is an implementation of the QUIC protocol in Go. 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. 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. No known workarounds are available.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| quic-go | quic-go | = 0.50.0 | — | No fix listed | CNA |
| — | github.com/quic-go/quic-go (Go) | 0.50.0 to before 0.50.1 | 0.50.1 | Patch available | GHSA-j972-j939-p2v3 |
- quic-go Vendorquic-go Affected = 0.50.0 Fixed in — No fix listed CNA
- github.com/quic-go/quic-go (Go) Vendor— Affected 0.50.0 to before 0.50.1 Fixed in 0.50.1 Patch available GHSA-j972-j939-p2v3
CPE names Threatist (inferred) · 1
Inferred from how NVD named this product before; not given by a source.
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:quic-go_project:quic-go:*:*:*:*:*:*:*:* | — | — | Quic-go Project |
- cpe:2.3:a:quic-go_project:quic-go:*:*:*:*:*:*:*:* Versions — — ·Quic-go Project
Remediation
- Fix · GHSA-j972-j939-p2v3 github.com/quic-go/quic-go (Go) Fixed in 0.50.1 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 6 products
- OpenShift Service Mesh 2
- OpenShift Service Mesh 3
- Red Hat Advanced Cluster Management for Kubernetes 2
- Red Hat Ansible Automation Platform 2
- Red Hat OpenShift Container Platform 4
- Red Hat OpenShift Dev Spaces
Timeline
- 2026-10-02 Threatist record created from CVE-2025-29785
- 2026-10-03 Alias added: GHSA-j972-j939-p2v3
References
More quic-go vulnerabilities
- TI-2024-14782 QUIC's Connection ID Mechanism vulnerable to Memory Exhaustion Attack CVSS 3.1HIGH 7.5
- TI-2023-24866 quic-go vulnerable to pointer dereference that can lead to panic CVSS 3.1HIGH 7.5
- TI-2026-29554 quic-go: HTTP/3 QPACK Trailer Expansion Memory Exhaustion CVSS 3.1HIGH 7.5
- TI-2026-17320 webtransport-go CloseWithError can block indefinitely CVSS 3.1HIGH 7.5
- TI-2026-17319 webtransport-go affected by Memory Exhaustion Attack due to Missing Length Check in WT_CLOSE_SESSION Capsule CVSS 3.1HIGH 7.5
- TI-2025-37061 quic-go has Client Crash Due to Premature HANDSHAKE_DONE Frame CVSS 3.1HIGH 7.5
Sources
- CVE-2025-29785 · CVE Program
- CVE-2025-29785 · NVD
- FIRST EPSS
- GHSA-j972-j939-p2v3 · GitHub Advisory Database · CC BY 4.0
- CVE-2025-29785 · Red Hat security data · CC BY 4.0
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