{"items":[{"id":"NVI-00018440","kind":"vulnerability","title":"Netty: Memory Exhaustion in RedisArrayAggregator due to Deeply Nested Arrays","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-3244-j874-rhc2","CVE-2026-44250"],"plain_summary":"GitHub lists this reviewed advisory for io.netty:netty-codec-redis, io.netty:netty-codec-redis. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-2438574055a82bcf809b4e1a5c6b1877"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-06-12T19:27:12.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-2438574055a82bcf809b4e1a5c6b1877"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-2438574055a82bcf809b4e1a5c6b1877","url":"https://github.com/advisories/GHSA-3244-j874-rhc2","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-3244-j874-rhc2","publisher":"GitHub Advisory Database","observed_at":"2026-11-06T15:12:54.193Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-2438574055a82bcf809b4e1a5c6b1877"],"technology":"io.netty:netty-codec-redis","known_exclusions":[],"conditions_summary":"### Summary\nAn attacker can cause DoS by sending a crafted Redis payload with deeply nested arrays. This forces the server to allocate a massive number of state objects and collections, leading to memory exhaustion and an OutOfMemoryError.\n\n### Details\nio.netty.handler.codec.redis.RedisArrayAggregator aggregates RedisMessage parts into ArrayRedisMessage. It uses a `Deque` to keep track of nested arrays. However, it does not limit the maximum depth of nested arrays. When an attacker sends a continuous stream of nested array headers (e.g., `*1\\r\\n*1\\r\\n*1\\r\\n...`), RedisArrayAggregator pushes a `new AggregateState` onto the stack and allocates a `new ArrayList` for each header. Because there is no depth limit, an attacker can send millions of such headers. This consumes a massive amount of heap memory for the AggregateState instances and their backing ArrayLists, eventually resulting in an OutOfMemoryError.\n\n### Impact\nDenial of Service due to memory exhaustion. Any application using Netty's RedisArrayAggregator to handle untrusted Redis traffic is vulnerable.","public_affected_ranges":[">= 4.2.0.Final, <= 4.2.14.Final"]},{"certainty":"source_listed","source_ids":["sr-2438574055a82bcf809b4e1a5c6b1877"],"technology":"io.netty:netty-codec-redis","known_exclusions":[],"conditions_summary":"### Summary\nAn attacker can cause DoS by sending a crafted Redis payload with deeply nested arrays. This forces the server to allocate a massive number of state objects and collections, leading to memory exhaustion and an OutOfMemoryError.\n\n### Details\nio.netty.handler.codec.redis.RedisArrayAggregator aggregates RedisMessage parts into ArrayRedisMessage. It uses a `Deque` to keep track of nested arrays. However, it does not limit the maximum depth of nested arrays. When an attacker sends a continuous stream of nested array headers (e.g., `*1\\r\\n*1\\r\\n*1\\r\\n...`), RedisArrayAggregator pushes a `new AggregateState` onto the stack and allocates a `new ArrayList` for each header. Because there is no depth limit, an attacker can send millions of such headers. This consumes a massive amount of heap memory for the AggregateState instances and their backing ArrayLists, eventually resulting in an OutOfMemoryError.\n\n### Impact\nDenial of Service due to memory exhaustion. Any application using Netty's RedisArrayAggregator to handle untrusted Redis traffic is vulnerable.","public_affected_ranges":["<= 4.1.134.Final"]}],"null_published_at":"2026-11-07T07:07:39.836Z","source_updated_at":"2026-06-12T19:27:12.000Z","source_disclosed_at":"2026-06-08T19:01:52.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-06T15:12:54.193Z"}],"next_cursor":null,"snapshot_revision":"42594"}