GHSA-6jv9-x5w9-2ccm: Netty's Lack of Lifecycle Cleanup Leads to Pooled ByteBuf Leak in RedisArrayAggregator

highCVSS 7.5CVE-2026-48006

Impact 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.

Details

Source: GitHub Security Advisories (INTL · database · site)
Severity: high — CVSS 7.5
Published: 2026-06-11
Last updated: 2026-07-10
Exploitation: Not in CISA KEV at last sync

Original advisory: https://github.com/advisories/GHSA-6jv9-x5w9-2ccm

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-480060.49% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 39% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-48006	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

high[UPDATE] [high] Netty: Multiple vulnerabilitiescert-bund

GHSA-6jv9-x5w9-2ccm: Netty's Lack of Lifecycle Cleanup Leads to Pooled ByteBuf Leak in RedisArrayAggregator

Details

Exploitation outlook

Referenced CVEs

Same CVEs, other sources

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