CVE-2026-116541: netty netty-tcnative

netty-tcnative before 2.0.84.Final Denial of Service via BIO Write Overcount

CVSS 8.2 HighEPSS 0.0049 · 42nd percentile

Published by the CVE Program (CNA: VulnCheck) at 26 Oct 2026, 14:59 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
netty	netty-tcnative Package name: io.netty:netty-tcnative https://repo1.maven.org/maven2/io/netty/netty-tcnative/ pkg:maven/io.netty/netty-tcnative	affected before 2.0.84.Final custom Other versions: unaffected
netty	netty-tcnative-boringssl-static Package name: io.netty:netty-tcnative-boringssl-static https://repo1.maven.org/maven2/io/netty/netty-tcnative-boringssl-static/ pkg:maven/io.netty/netty-tcnative-boringssl-static	affected before 2.0.84.Final custom Other versions: unaffected

Identifiers

CVE-2026-116541

CNA

VulnCheck

Weakness (CWE)

CWE-682

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.2	High	4.0	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	CNA (VulnCheck)Used for this record
5.9	Medium	3.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H	CNA (VulnCheck)

CISA KEV Not listed.
EPSS 0.0049, the 42nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 26 Oct 2026. New records show when each source confirmed them.

Sources

References from the CNA

github.com/netty/netty-tcnative/security/advisories/GHSA-9xr3-jwv4-r489 vendor-advisory
github.com/netty/netty-tcnative/commit/e31df4a5885b35085fdfa3e2dca7c1f705d4745b patch
github.com/netty/netty-tcnative/blob/netty-tcnative-parent-2.0.83.Final/openssl-dynamic/src/main/c/ssl.c#L240 technical-description
github.com/netty/netty-tcnative/releases/tag/netty-tcnative-parent-2.0.84.Final release-notes
github.com/netty/netty-tcnative product
www.vulncheck.com/advisories/netty-tcnative-before-2.0.84-final-denial-of-service-via-bio-write-overcount third-party-advisory

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.