CVE catalog
CVE-2026-116539
netty-tcnative: CVE-2026-116539
- Severity
- Medium
- Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.40% · Oct 27, 2026
Netty netty-tcnative before 2.0.84.Final contains a heap buffer overflow vulnerability in the tcn_write_to_bytebuffer BIO callback caused by failing to wrap the non-application ring buffer write index. Remote TLS peers can drive handshake, renegotiation, or post-handshake messages into this buffer, triggering an out-of-bounds memcpy that crashes the JVM process.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | netty-tcnative | sid | 2.0.28-1 | vulnerable |
| Debian | netty-tcnative | forky | 2.0.28-1 | vulnerable |
| Debian | netty-tcnative | trixie | 2.0.28-1 | vulnerable |
| Debian | netty-tcnative | bookworm | 2.0.28-1 | vulnerable |
| Ubuntu | netty-tcnative | 16.04 | 1.1.33.Fork6-1 | vulnerable |
| Ubuntu | netty-tcnative | 16.04 | 1.1.33.Fork10-2 | vulnerable |
| Ubuntu | netty-tcnative | 16.04 | 1.1.33.Fork14-1 | vulnerable |
| Ubuntu | netty-tcnative | 18.04 | 1.1.33.Fork26-1 | vulnerable |
| Ubuntu | netty-tcnative | 18.04 | 1.1.33.Fork26-1build1 | vulnerable |
| Ubuntu | netty-tcnative | 20.04 | 2.0.20-1 | vulnerable |
| Ubuntu | netty-tcnative | 20.04 | 2.0.28-1 | vulnerable |
| Ubuntu | netty-tcnative | 22.04 | 2.0.28-1 | vulnerable |
| Ubuntu | netty-tcnative | 22.04 | 2.0.28-1build1 | vulnerable |
| Ubuntu | netty-tcnative | 24.04 | 2.0.28-1build1 | vulnerable |
| Ubuntu | netty-tcnative | 24.04 | 2.0.28-1build2 | vulnerable |
| Ubuntu | netty-tcnative | 24.04 | 2.0.28-1build3 | vulnerable |
| Ubuntu | netty-tcnative | 24.04 | 2.0.28-1build4 | vulnerable |
| Ubuntu | netty-tcnative | 26.10 | 2.0.28-1build5 | vulnerable |
| Ubuntu | netty-tcnative | 26.10 | 2.0.28-1build6 | vulnerable |
| Ubuntu | netty-tcnative | 26.04 | 2.0.28-1build4 | vulnerable |
| Ubuntu | netty-tcnative | 26.04 | 2.0.28-1build5 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | netty-tcnative | source | sid | (unfixed) | not yet assigned | Not reported | [1152301] |
| Debian | netty-tcnative | source | forky | (unfixed) | not yet assigned | Not reported | [1152301] |
| Debian | netty-tcnative | source | trixie | (unfixed) | not yet assigned | Not reported | [1152301] |
| Debian | netty-tcnative | source | bookworm | (unfixed) | not yet assigned | Not reported | [1152301] |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libnetty-tcnative-java]Affected
Source package: [netty-tcnative]
Details (2)
2.0.28-1· all · bookwormAffected
dsa · netty-tcnative · debian · bookworm; dsa · netty-tcnative · debian · 12
2.0.28-1· all · bookwormAffected
dsa · netty-tcnative · debian · bookworm; dsa · netty-tcnative · debian · 12
- [libnetty-tcnative-jni]Affected
Source package: [netty-tcnative]
Details (2)
2.0.28-1+b1· amd64 · bookwormAffected
dsa · netty-tcnative · debian · bookworm; dsa · netty-tcnative · debian · 12
2.0.28-1+b1· arm64 · bookwormAffected
dsa · netty-tcnative · debian · bookworm; dsa · netty-tcnative · debian · 12
[Debian 13 (Trixie)]
- [libnetty-tcnative-java]Affected
Source package: [netty-tcnative]
Details (2)
2.0.28-1· all · trixieAffected
dsa · netty-tcnative · debian · 13
2.0.28-1· all · trixieAffected
dsa · netty-tcnative · debian · 13
- [libnetty-tcnative-jni]Affected
Source package: [netty-tcnative]
Details (2)
2.0.28-1+b2· amd64 · trixieAffected
dsa · netty-tcnative · debian · 13
2.0.28-1+b3· arm64 · trixieAffected
dsa · netty-tcnative · debian · 13
Observed: