Improperly Controlled Sequential Memory Allocation Affecting io.netty:netty-transport-sctp package, versions [,4.1.137.Final)[4.2.0.Final,4.2.17.Final)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published19 Aug 2026
- disclosed17 Aug 2026
- creditvioletagg
Introduced: 17 Aug 2026
NewCVE-2026-59902 (opens in a new tab)How to fix?
Upgrade io.netty:netty-transport-sctp to version 4.1.137.Final, 4.2.17.Final or higher.
Overview
Affected versions of this package are vulnerable to Improperly Controlled Sequential Memory Allocation due to unbounded buffering of incomplete SCTP message fragments. An attacker can trigger an OutOfMemoryError by sending large or many fragmented SCTP messages that the handler retains while waiting for completion. The handler limits fragment counts, but it does not cap the total bytes held across incomplete messages, so a small number of concurrent connections can accumulate enough buffered data to exhaust server memory and disrupt applications using Netty’s SCTP transport.