{"id":"GHSA-6jv9-x5w9-2ccm","summary":"Netty's Lack of Lifecycle Cleanup Leads to Pooled ByteBuf Leak in RedisArrayAggregator","details":"### Impact\nThe 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.","aliases":["CVE-2026-48006"],"modified":"2026-09-18T15:45:05.820847753Z","published":"2026-06-11T13:26:06Z","database_specific":{"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2026-06-11T13:26:06Z","nvd_published_at":"2026-06-12T16:16:30Z","cwe_ids":["CWE-401","CWE-772"]},"references":[{"type":"WEB","url":"https://github.com/netty/netty/security/advisories/GHSA-6jv9-x5w9-2ccm"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-48006"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:37390"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:41951"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:50085"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:53644"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:53645"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:53646"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:53806"},{"type":"WEB","url":"https://access.redhat.com/security/cve/CVE-2026-48006"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2488433"},{"type":"PACKAGE","url":"https://github.com/netty/netty"},{"type":"WEB","url":"https://github.com/netty/netty/releases/tag/netty-4.1.135.Final"},{"type":"WEB","url":"https://github.com/netty/netty/releases/tag/netty-4.2.15.Final"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48006.json"}],"affected":[{"package":{"name":"io.netty:netty-codec-redis","ecosystem":"Maven","purl":"pkg:maven/io.netty/netty-codec-redis"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.2.0.Final"},{"fixed":"4.2.15.Final"}]}],"versions":["4.2.0.Final","4.2.1.Final","4.2.10.Final","4.2.11.Final","4.2.12.Final","4.2.13.Final","4.2.14.Final","4.2.2.Final","4.2.3.Final","4.2.4.Final","4.2.5.Final","4.2.6.Final","4.2.7.Final","4.2.8.Final","4.2.9.Final"],"database_specific":{"last_known_affected_version_range":"\u003c= 4.2.14.Final","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-6jv9-x5w9-2ccm/GHSA-6jv9-x5w9-2ccm.json"}},{"package":{"name":"io.netty:netty-codec-redis","ecosystem":"Maven","purl":"pkg:maven/io.netty/netty-codec-redis"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.135.Final"}]}],"versions":["4.1.0.Final","4.1.1.Final","4.1.10.Final","4.1.100.Final","4.1.101.Final","4.1.102.Final","4.1.103.Final","4.1.104.Final","4.1.105.Final","4.1.106.Final","4.1.107.Final","4.1.108.Final","4.1.109.Final","4.1.11.Final","4.1.110.Final","4.1.111.Final","4.1.112.Final","4.1.113.Final","4.1.114.Final","4.1.115.Final","4.1.116.Final","4.1.117.Final","4.1.118.Final","4.1.119.Final","4.1.12.Final","4.1.120.Final","4.1.121.Final","4.1.122.Final","4.1.123.Final","4.1.124.Final","4.1.125.Final","4.1.126.Final","4.1.127.Final","4.1.128.Final","4.1.129.Final","4.1.13.Final","4.1.130.Final","4.1.131.Final","4.1.132.Final","4.1.133.Final","4.1.134.Final","4.1.14.Final","4.1.15.Final","4.1.16.Final","4.1.17.Final","4.1.18.Final","4.1.19.Final","4.1.2.Final","4.1.20.Final","4.1.21.Final","4.1.22.Final","4.1.23.Final","4.1.24.Final","4.1.25.Final","4.1.26.Final","4.1.27.Final","4.1.28.Final","4.1.29.Final","4.1.3.Final","4.1.30.Final","4.1.31.Final","4.1.32.Final","4.1.33.Final","4.1.34.Final","4.1.35.Final","4.1.36.Final","4.1.37.Final","4.1.38.Final","4.1.39.Final","4.1.4.Final","4.1.40.Final","4.1.41.Final","4.1.42.Final","4.1.43.Final","4.1.44.Final","4.1.45.Final","4.1.46.Final","4.1.47.Final","4.1.48.Final","4.1.49.Final","4.1.5.Final","4.1.50.Final","4.1.51.Final","4.1.52.Final","4.1.53.Final","4.1.54.Final","4.1.55.Final","4.1.56.Final","4.1.57.Final","4.1.58.Final","4.1.59.Final","4.1.6.Final","4.1.60.Final","4.1.61.Final","4.1.62.Final","4.1.63.Final","4.1.64.Final","4.1.65.Final","4.1.66.Final","4.1.67.Final","4.1.68.Final","4.1.69.Final","4.1.7.Final","4.1.70.Final","4.1.71.Final","4.1.72.Final","4.1.73.Final","4.1.74.Final","4.1.75.Final","4.1.76.Final","4.1.77.Final","4.1.78.Final","4.1.79.Final","4.1.8.Final","4.1.80.Final","4.1.81.Final","4.1.82.Final","4.1.83.Final","4.1.84.Final","4.1.85.Final","4.1.86.Final","4.1.87.Final","4.1.88.Final","4.1.89.Final","4.1.9.Final","4.1.90.Final","4.1.91.Final","4.1.92.Final","4.1.93.Final","4.1.94.Final","4.1.95.Final","4.1.96.Final","4.1.97.Final","4.1.98.Final","4.1.99.Final"],"database_specific":{"last_known_affected_version_range":"\u003c= 4.1.134.Final","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-6jv9-x5w9-2ccm/GHSA-6jv9-x5w9-2ccm.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]}