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Fencer Vulns
medium 5.3

CVE-2026-85522 json

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

published 2026-09-04 2 mo ago modified 2026-09-08 2 mo ago also EUVD-2026-71102

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 58%
public exploits
0
none known

Summary

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.

Patch / fix

  • valkey-io valkey 9.0.5, 9.1.1
  • valkey Debian 14 9.1.2-1

debian advisories DEBIAN-CVE-2026-85522

  • valkey Ubuntu 26.04 LTS 9.0.4-0ubuntu0.2

ubuntu advisories UBUNTU-CVE-2026-85522

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • valkey hummingbird 1 9.0.6-0.1.hum1
  • valkey-rdma hummingbird 1 9.0.6-0.1.hum1
  • valkey-compat-redis hummingbird 1 9.0.6-0.1.hum1

red hat advisories RHSA-2026:61884

  • valkey openSUSE Tumbleweed 9.1.2-2.1

opensuse advisories openSUSE-SU-2026:11809-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-85522 updated cvss 7.5

valkey: Valkey: Remote out-of-bounds read in Slot Migration can lead to denial of service

  • Red Hat Hardened Images valkey 9.0.6-0.1.hum1, valkey-rdma 9.0.6-0.1.hum1, valkey-compat-redis 9.0.6-0.1.hum1
    fixed: vendor fix RHSA-2026:61884
  • Red Hat Enterprise Linux 9 valkey Red Hat Enterprise Linux 10 valkey
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
2 mo ago

Exploit prediction

0.86% chance of exploitation in the next 30 days, higher than 58% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/valkey-io/valkey/issues/4207 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 6.9 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
CNA 3.0 5.3 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
CNA 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:OF/RC:C
CNA 4.0 5.5 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CNA 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • valkey-io valkey

Classification

Weakness
  • CWE-125 Out-of-bounds Read
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.