Missing Release of Resource after Effective Lifetime in Netty - CVE-2026-44893
Published: June 8, 2026
Vulnerability identifier: #VU133454
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-44893
CWE-ID: CWE-772
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Netty project
Affected software:
Netty
Netty
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper resource management in HAProxyMessage.readNextTLV() when decoding a PP2_TYPE_SSL TLV with an invalid length. A remote attacker can send a specially crafted HAProxy TLV to cause a denial of service.
The issue is triggered when the TLV length is set below 5, causing an IndexOutOfBoundsException to propagate while a retained slice on the pooled cumulation buffer is not released.
How to mitigate CVE-2026-44893
Install security update from vendor's website.