CVE-2026-116540

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.45% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 39.5% 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 14:59Z2 DAYS AGO

Last updated

2026-10-26 16:15Z2 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-416Use After FreeVariant

Data version

5.2

Document digest

5cb65fb844bdf3ec35d7c2e428efa73149690a6e89fbc0c6941e9d26b8022043

• github.comGitHub Security Advisory (GHSA-mmc8-vg2v-fvvw)https://github.com/netty/netty-tcnative/security/advisories/GHSA-mmc8-vg2v-fvvwvendor-advisory
• github.comPatch Commithttps://github.com/netty/netty-tcnative/commit/59662a8b07a9a7623ae1bc472f5751f31c81a118patch
• github.comhttps://github.com/netty/netty-tcnative/blob/netty-tcnative-parent-2.0.83.Final/openssl-dynamic/src/main/c/sslcontext.c#L1365technical-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-tcnative 2.0.66.Final before 2.0.84.Final Use-After-Free in Session Ticket Callbackhttps://www.vulncheck.com/advisories/netty-tcnative-2.0.66-final-before-2.0.84-final-use-after-free-in-session-ticket-callbackthird-party-advisory