Valkey pre-9.5.4/9.1 OOB Read in Slot Migration (createSlotImportJob)
CVE-2026-85522 Published on September 4, 2026

valkey-io valkey Slot Migration cluster_migrateslots.c createSlotImportJob out-of-bounds
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.

NVD

Timeline

Advisory disclosed

VulDB entry created

VulDB entry last update

Weakness Types

Out-of-bounds Read

The software reads data past the end, or before the beginning, of the intended buffer. Typically, this can allow attackers to read sensitive information from other memory locations or cause a crash. A crash can occur when the code reads a variable amount of data and assumes that a sentinel exists to stop the read operation, such as a NUL in a string. The expected sentinel might not be located in the out-of-bounds memory, causing excessive data to be read, leading to a segmentation fault or a buffer overflow. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent read operation then produces undefined or unexpected results.

What is a Buffer Overflow Vulnerability?

The software performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer.

CVE-2026-85522 has been classified to as a Buffer Overflow vulnerability or weakness.


Products Associated with CVE-2026-85522

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Valkey Io Valkey
 
Canonical Ubuntu Linux
 

Affected Versions

valkey-io valkey: