Socket Handling Flaw in Netty's Network Framework
CVE-2026-45536

4MEDIUM

Key Information:

Vendor

Netty

Status
Netty
Vendor
CVE Published:
12 June 2026

What is CVE-2026-45536?

A flaw exists in Netty's handling of Unix sockets, where the system allocates file descriptors without proper validation. This results in the leakage of file descriptors during socket communications when a specific message structure is received. The vulnerability can be triggered in non-blocking mode, permitting the leakage of descriptors without notice, potentially exhausting system resources. Developers using affected versions of Netty should upgrade to either 4.1.135.Final or 4.2.15.Final to mitigate this issue.

Affected Version(s)

netty >= 4.2.0.Final, < 4.2.15.Final < 4.2.0.Final, 4.2.15.Final

netty < 4.1.135.Final < 4.1.135.Final

References

https://github.com/netty/netty/security/advisories/GHSA-w...
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https://github.com/netty/netty/releases/tag/netty-4.1.135...
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https://github.com/netty/netty/releases/tag/netty-4.2.15....
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CVSS V3.1

Score:
4
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.