CVE-2026-116539

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

0.39% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 33.6% of scored records. A rank, not a probability.

NVD base score

8.2 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Awaiting Analysis. NVD last modified this record on 2026-10-26.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-10-26 14:59Z3 DAYS AGO

Last updated

2026-10-26 14:59Z3 DAYS AGO

Reserved

2026-10-26

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

High (CVSS 8.2)

CNA CVSS vector

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

Weaknesses

• CWE-787Out-of-bounds WriteBase

Data version

5.2

Document digest

7b5e936f1faa7715c7cc85818e5f29d26d6133df2ecf655258eda9645d0d8ce7

• github.comGitHub Security Advisory (GHSA-gf9q-9mg7-g5qh)https://github.com/netty/netty-tcnative/security/advisories/GHSA-gf9q-9mg7-g5qhvendor-advisory
• github.comPatch Commithttps://github.com/netty/netty-tcnative/commit/92dd66fd1243d85c05a61288f96367a70260b6b8patch
• github.comhttps://github.com/netty/netty-tcnative/blob/netty-tcnative-parent-2.0.83.Final/openssl-dynamic/src/main/c/ssl.c#L199technical-description
• github.comnetty-tcnative netty-tcnative-parent-2.0.84.Final Release Noteshttps://github.com/netty/netty-tcnative/releases/tag/netty-tcnative-parent-2.0.84.Finalrelease-notes
• github.comhttps://github.com/netty/netty-tcnativeproduct
• www.vulncheck.comVulnCheck Advisory: Netty netty-tcnative before 2.0.84.Final Heap Buffer Overflow via OpenSSL BIOhttps://www.vulncheck.com/advisories/netty-netty-tcnative-before-2.0.84-final-heap-buffer-overflow-via-openssl-biothird-party-advisory