CVE-2026-85522 valkey-io valkey Slot Migration cluster_migrateslots.c createSlotImportJob out-of-bounds
Remote attackers can trigger an out-of-bounds read in Valkey's slot migration feature, potentially causing crashes or leaking memory.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-85522?
CVE-2026-85522 is a medium-severity memory corruption vulnerability in valkey-io valkey, published on 4 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was detected in valkey-io valkey up to 9.5.4/9.1.0. Affected by this vulnerability is the function createSlotImportJob of the file src/cluster_migrateslots.c of the component Slot Migration. The manipulation of the argument job_name results in out-of-bounds read. The attack can be executed remotely. The exploit is now public and may be used. Upgrading to version 9.0.5 and 9.1.1 addresses this issue. The patch is identified as f4dc3ca09eb650c2fe14060090a41c524eca803f. Upgrading the affected component is advised.
Which versions are affected by CVE-2026-85522?
How do I fix CVE-2026-85522?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-85522 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-85522 exists.
Sources
Also known as BELL-CVE-2026-85522, DEBIAN-CVE-2026-85522, GHSA-cmxq-3354-mw5w, UBUNTU-CVE-2026-85522.