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CVE-2026-116539high8.2

Netty netty-tcnative before 2.0.84.Final Heap Buffer Overflow via OpenSSL BIO

Impact

Netty netty-tcnative before 2.0.84.Final has a heap buffer overflow vulnerability via OpenSSL BIO, allowing remote TLS peers to crash the JVM process. The vulnerability is caused by an out-of-bounds memcpy. Affected versions are less than 2.0.84.Final.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

netty · VulnCheck

netty-tcnative

1 range
VulnCheck version evidence

Package identity

pkg:maven/io.netty/netty-tcnativeExplore io.netty:netty-tcnative →

Identity supplied by VulnCheck. Version matching requires compatible range evidence.

Compare with this publisher’s ranges. This does not inspect your installation.

affected

0 → before 2.0.84.Final

custom versions

unaffected

unknown

Other versions: unaffected

netty · VulnCheck

netty-tcnative-boringssl-static

1 range
VulnCheck version evidence

Package identity

pkg:maven/io.netty/netty-tcnative-boringssl-staticExplore io.netty:netty-tcnative-boringssl-static →

Identity supplied by VulnCheck. Version matching requires compatible range evidence.

Compare with this publisher’s ranges. This does not inspect your installation.

affected

0 → before 2.0.84.Final

custom versions

unaffected

unknown

Other versions: unaffected

Original source description

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.

Inside the record

Evidence available

Package identity
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers · not supplied

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-116539

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-787 ↗

Out-of-bounds Write

VulnCheck

Related →
Contributing organizations · 1
VulnCheck

Assigning organization

2026-10-26

What changed

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Large field values are marked as truncated previews. Original source snapshots remain retained.

References

6 sources
github.com/netty/netty-tcnative/security/advisories/GHSA-gf9q-9mg7-g5qh
vendor-advisoryVulnCheck
github.com/netty/netty-tcnative/commit/92dd66fd1243d85c05a61288f96367a70260b6b8
patchVulnCheck
github.com/netty/netty-tcnative/blob/netty-tcnative-parent-2.0.83.Final/openssl-dynamic/src/main/c/ssl.c
technical-descriptionVulnCheck
github.com/netty/netty-tcnative/releases/tag/netty-tcnative-parent-2.0.84.Final
release-notesVulnCheck
github.com/netty/netty-tcnative
productVulnCheck
www.vulncheck.com/advisories/netty-netty-tcnative-before-2.0.84-final-heap-buffer-overflow-via-openssl-bio
third-party-advisoryVulnCheck