DragonflyDB stream RDB deserialization double-free

Dragonfly is an in-memory data store built for modern application workloads. Prior to 1.40, OpaqueObjLoader::CreateStream in src/server/rdb_load.cc can associate one streamNACK with a consumer group's global PEL and a consumer-local PEL, then free the shared object when a duplicate consumer entry is rejected. Cleanup subsequently frees the same object again. In the default configuration, where Dragonfly ships with authentication disabled, an unauthenticated client can trigger the double-free by sending a crafted serialized stream to RESTORE, causing allocator corruption, denial of service, and potentially attacker-controlled code execution as the Dragonfly service account. The source fix has not yet been mapped to a published release.

Source published

13 Oct 2026 14:42:54 UTC

Source modified

13 Oct 2026 15:26:00 UTC

Observed here

23 Oct 2026 15:48:27 UTC

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CVSS 3.1 · 9.6 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H