Detections
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Echo: multiple io.netty:netty-transport-native-epoll packages: security update to 4.1.135.Final

medium Tenable Cloud Security Plugin ID 462411

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Netty is a network application framework for development of protocol servers and clients. Prior to
 versions 4.1.135.Final and 4.2.15.Final, netty_unix_socket_recvFd sets msg_control to `char
 control[CMSG_SPACE(sizeof(int))]` (line 940) — 24 bytes on 64-bit Linux. A peer-sent SCM_RIGHTS cmsg
 carrying two ints has cmsg_len = CMSG_LEN(8) = 24, which fits exactly with no MSG_CTRUNC, so the kernel
 installs both fds in the receiving process. The subsequent check `cmsg->cmsg_len == CMSG_LEN(sizeof(int))`
 (line 972, expected 20) fails, the branch that would read the fd is skipped, and neither installed fd is
 closed. The for(;;) loop calls recvmsg again (non-blocking → EAGAIN → Java maps to 0 → read loop exits
 normally), leaving two leaked fds per message. There is no MSG_CTRUNC handling. Reachable via Epoll/KQueue
 DomainSocketChannel when the application opts into DomainSocketReadMode.FILE_DESCRIPTORS (non-default).
 Versions 4.1.135.Final and 4.2.15.Final patch the issue. (CVE-2026-45536)

Solution

Update the io.netty:netty-transport-native-epoll library and its related packages to version 4.1.135.Final or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-45536

Plugin Details

Severity: Medium

ID: 462411

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/3/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2026-45536

CVSS v3

Risk Factor: Medium

Base Score: 4

Temporal Score: 3.5

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 9/28/2026

Vulnerability Publication Date: 6/8/2026

Reference Information

CVE: CVE-2026-45536