CVE-2026-48006High· 7.5▾ TwilightNetty 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 pipe…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Jul 7.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.5%
0.5% → 0.7%
7.5 → 8.7
8.7 → 7.5
7.5 → 8.7
8.7 → 7.5
Last analysed / modified upstream
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.
netty < 4.1.135netty >= 4.2.0, < 4.2.15Upgrade past the affected range:
netty 4.2.15Affected packages:
io.netty:netty-codec-redis >= 4.2.0.Final, <= 4.2.14.Finalio.netty:netty-codec-redis <= 4.1.134.FinalPatched in:
io.netty:netty-codec-redis 4.2.15.Finalio.netty:netty-codec-redis 4.1.135.FinalSource: https://github.com/advisories/GHSA-6jv9-x5w9-2ccm
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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