CVE-2026-45536

Katalog CVE

CVSS 4.0 · Medium EPSS 0,19%

Kerentanan Exposure of Sensitive Information to an Unauthorized Actor pada netty. Skor CVSS 3.1 4.0 (Medium) menurut github.com.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

12 Juni 2026

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

4.0 (Medium), sumber github.com
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
CWE-772: Missing Release of Resource after Effective Lifetime

EPSS (30 hari)

0,19% peluang dieksploitasi; lebih tinggi dari 8,2% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/netty/netty/security/advisories/GHSA-w573-9ffj-6ff9 advisory vendor
• https://github.com/netty/netty/releases/tag/netty-4.1.135.Final release notes
• https://github.com/netty/netty/releases/tag/netty-4.2.15.Final release notes