CVE-2026-48006: netty
Vulnerability summary
CVE-2026-48006 is a high (CVSS 8.7) vulnerability in netty. EPSS estimates a 0.85% chance of exploitation in the next 30 days, higher than 57.4% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 5 · Related 3Timeline
- 12-06-2026PublishedVulnerability first disclosed.
- 18-09-2026Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
11 scores · 7 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated8.7HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- OSV · WolfiEcosystem advisory · calculated8.7HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- OSV · ChainguardEcosystem advisory · calculated8.7HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- OSV · MavenEcosystem advisory · calculated8.7HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- NVDNIST8.7HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · MavenEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.85%
Chance of exploitation in the next 30 days
Percentile
57%
Versus all other CVEs
30-day change
+0.11 pp
From 0.74% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-401Missing Release of Memory after Effective LifetimeThe product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.
- CWE-772Missing Release of Resource after Effective LifetimeThe product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed.
Affected systems
Chainguard13 products
- celeborn-0.5< 0.5.4-r25
- celeborn-0.6< 0.6.3-r8
- gremlin-server< 3.8.1-r2
- hadoop-fips-3.3.6All versions (No fix recorded)
- hadoop-fips-3.4.2All versions (No fix recorded)
Wolfi5 products
- celeborn-0.6< 0.6.3-r8
- management-api-for-apache-cassandra-5.0< 0.1.120-r0
- tez< 0.10.5-r15
- thingsboard-tb-mqtt-transport< 4.3.1.2-r13
- thingsboard-tb-node< 4.3.1.2-r13
Debian1 product
- nettyAll versions (No fix recorded)
Io.netty1 product
- netty-codec-redis≥ 4.2.0.Final, < 4.2.15.Final | < 4.1.135.Final
Netty1 product
- netty≥ 4.2.0.Final, < 4.2.15.Final | < 4.1.135.Final | < 4.1.135 | ≥ 4.2.0, < 4.2.15
Ubuntu1 product
- nettyAll versions (No fix recorded)
6 vendors · 22 products
References
19 links- github.com/netty/netty/security/advisories/GHSA-6jv9-x5w9-2ccmX Refsource CONFIRMREPORTAdvisoryWEBVendor Advisory
Show all 19 references
- github.com/netty/nettyPACKAGE