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Netty: HTTP/2 decompression leaks ByteBuf reference count when the decompressor channel is already closed (Direct memory leak / OOM DoS)
Netty: HTTP/2 decompression leaks ByteBuf reference count when the decompressor channel is already closed (Direct memory leak / OOM DoS)
Affected packages
- io.netty:netty-codec-http2— 4.2.0 → 4.2.16.Final
Exploit signal
- Known exploited (CISA KEV)
- No
- EPSS score
- 0.36%
- EPSS percentile
- 29.2%
EPSS is the probability a CVE is exploited in the wild; percentile is its rank among all CVEs. This advisory is in the top 29%.
Sources
- https://github.com/netty/netty/security/advisories/GHSA-93wv-jw9v-4972
- https://nvd.nist.gov/vuln/detail/CVE-2026-56819
- https://github.com/netty/netty/commit/5b68c61f37aa4a3045cba624cbea239655c9003b
- https://github.com/netty/netty/commit/bb2ff68a1fb71cb4b0eb9a9e17b66c52aff680c6
- https://github.com/netty/netty
- https://github.com/netty/netty/releases/tag/netty-4.1.136.Final
- https://github.com/netty/netty/releases/tag/netty-4.2.16.Final
Structured record: https://osv.dev/vulnerability/GHSA-93wv-jw9v-4972
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