Memory Leak Vulnerability in Netty Framework
CVE-2026-73508

5.3MEDIUM

Key Information:

Vendor

Netty

Status
Netty
Vendor
CVE Published:
13 August 2026

What is CVE-2026-73508?

The Netty framework is susceptible to a memory leak vulnerability where the components responsible for decoding DNS records and handling domain names do not release buffers appropriately when malformed input is processed. This issue allows for unauthenticated remote DNS packets to continuously consume memory, potentially leading to a denial of service. Users are advised to upgrade to versions 4.1.136.Final or 4.2.16.Final to mitigate this risk and ensure optimal performance.

Affected Version(s)

netty < 4.1.136.Final < 4.1.136.Final

netty >= 4.2.0.Final, < 4.2.16.Final < 4.2.0.Final, 4.2.16.Final

References

https://github.com/netty/netty/security/advisories/GHSA-m...
x_refsource_CONFIRM
https://github.com/netty/netty/commit/5b68c61f37aa4a3045c...
x_refsource_MISC
https://github.com/netty/netty/commit/bb2ff68a1fb71cb4b0e...
x_refsource_MISC

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.