CVE-2026-45536
mediumpriority · track · 0EPSS 0.001 · 3 %ileDEEUFRRUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 3.7–4
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (57)
Products and version ranges known to be affected.
- IBM App Connect Enterprise Professionalall versionscert_bundDEcpe:/a:ibm:app_connect_enterprise:professional
- Red Hat Enterprise Linux Data Grid 8all versionscert_bundDEcpe:/o:redhat:enterprise_linux:data_grid_8
advisories (4)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2026-1814Netty: Mehrere SchwachstellenDeutsch2026-06-07csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Netty ausnutzen, um Sicherheitsvorkehrungen zu umgehen, Daten zu manipulieren, vertrauliche Informationen offenzulegen oder einen Denial-of-Service-Zustand herbeizuführen.
- GHSA-w573-9ffj-6ff9Netty: Unix-socket fd receive leaks descriptors when peer sends two at once2026-06-08ghsa · osvUS
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).
- CERTFR-2026-AVI-1378Multiples vulnérabilités dans les produits IBMFrançais2026-10-23vendor · certfrFR
- CERTFR-2026-AVI-1385Multiples vulnérabilités dans les produits VMwareFrançais2026-10-26vendor · certfrFR
also known as (5)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (10)
External citations — patches, advisories, analysis.
- https://github.com/netty/netty/releasesPatchcnnvd
- https://github.com/netty/netty/releases/tag/netty-4.1.135.Finalcnnvd
- https://github.com/netty/netty/releases/tag/netty-4.2.15.Finalcnnvd
- https://github.com/netty/netty/security/advisories/GHSA-w573-9ffj-6ff9cnnvd
- https://github.com/netty/netty/releases/tag/netty-4.1.135.Finalenisa_euvd
- https://github.com/netty/netty/releases/tag/netty-4.2.15.Finalenisa_euvd
- https://github.com/netty/netty/security/advisories/GHSA-w573-9ffj-6ff9enisa_euvd
- https://github.com/netty/netty/releases/tag/netty-4.1.135.FinalRelease Notesnvd
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