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, the RedisArrayAggregator handler permanently leaks pooled direct-memory buffers when a Redis pipeline connection closes before a RESP array aggregate completes. The handler retains child messages in per-handler state (`depths` field) but defines no `channelInactive`, `handlerRemoved`, or `exceptionCaught` method to release them when the pipeline tears down. Because the leaked buffers are slices of `PooledByteBufAllocator` chunks, they prevent those chunks from being returned to the JVM-wide direct-memory pool. Repeated connection churn by any network peer monotonically drains this shared pool, eventually causing allocation failures on all Netty channels in the process. Versions 4.1.135.Final and 4.2.15.Final patch the issue.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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, the RedisArrayAggregator handler permanently leaks pooled direct-     memory buffers when a Redis pipeline connection closes before a RESP array aggregate completes. The     handler retains child messages in per-handler state (`depths` field) but defines no `channelInactive`,     `handlerRemoved`, or `exceptionCaught` method to release them when the pipeline tears down. Because the     leaked buffers are slices of `PooledByteBufAllocator` chunks, they prevent those chunks from being     returned to the JVM-wide direct-memory pool. Repeated connection churn by any network peer monotonically     drains this shared pool, eventually causing allocation failures on all Netty channels in the process.
    Versions 4.1.135.Final and 4.2.15.Final patch the issue. (CVE-2026-48006)

Note that Nessus relies on the presence of the package as reported by the vendor.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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, the RedisArrayAggregator handler permanently leaks pooled direct-
    memory buffers when a Redis pipeline connection closes before a RESP array aggregate completes. The
    handler retains child messages in per-handler state (`depths` field) but defines no `channelInactive`,
    `handlerRemoved`, or `exceptionCaught` method to release them when the pipeline tears down. Because the
    leaked buffers are slices of `PooledByteBufAllocator` chunks, they prevent those chunks from being
    returned to the JVM-wide direct-memory pool. Repeated connection churn by any network peer monotonically
    drains this shared pool, eventually causing allocation failures on all Netty channels in the process.
    Versions 4.1.135.Final and 4.2.15.Final patch the issue. (CVE-2026-48006)

ID	Name	Product	Family	Severity
320921	Linux Distros Unpatched Vulnerability : CVE-2026-48006	Nessus	Misc.	high
443085	SCA: security update for io.netty:netty-codec-redis (GHSA-6jv9-x5w9-2ccm)	Tenable Cloud Security	SCA Checks	high
443085	SCA: security update for io.netty:netty-codec-redis (GHSA-6jv9-x5w9-2ccm)	Tenable Self-Hosted Container Security	SCA Checks	high

Detections

Analytics

CVE-2026-48006

high

Tenable Plugins

high

high

high