valkey-io valkey kvstore.c kvstoreGetHashtable out-of-bounds

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-86227
StatePUBLISHED
AssignerVulDB
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-06 23:17:38 UTC
Updated2026-09-06 23:17:38 UTC
DescriptionA weakness has been identified in valkey-io valkey up to 9.0.5/9.1.1. This affects the function kvstoreGetHashtable of the file src/kvstore.c. This manipulation of the argument didx causes out-of-bounds read. It is possible to initiate the attack remotely. The attack is considered to have high complexity. It is indicated that the exploitability is difficult. The exploit has been made available to the public and could be used for attacks. Patch name: 4691888e7fab3df128f0bde5750c9fde2ae552fa. To fix this issue, it is recommended to deploy a patch. Exploitation requires cluster mode plus attacker-controlled dump.rdb at startup (data-dir write access, replication feed, or a stored crafted RDB) - an attacker-position DoS at boot, not network pre-auth. The issue report was closed stating it "is worth fixing for the sake of memory safety… but I don't think it meets our bar for a security disclosure."

Risk And Classification

Primary CVSS: v4.0 1.3 LOW from [email protected]

CVSS:4.0/AV:N/AC:H/AT:N/PR:L/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

Problem Types: CWE-119 | CWE-125 | CWE-125 Out-of-Bounds Read | CWE-119 Memory Corruption

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary1.3LOWCVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/C...
4.0CNADECLARED2.3LOWCVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
3.1[email protected]Primary3.1LOWCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
3.1CNADECLARED3.1LOWCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
3.0CNADECLARED3.1LOWCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
2.0[email protected]Secondary2.1AV:N/AC:H/Au:S/C:N/I:N/A:P
2.0CNADECLARED2.1AV:N/AC:H/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
High
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:N/AC:H/AT:N/PR:L/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

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

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

CVSS v3.0 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Valkey-io Valkey affected 9.0.0 Not specified
CNA Valkey-io Valkey affected 9.0.1 Not specified
CNA Valkey-io Valkey affected 9.0.2 Not specified
CNA Valkey-io Valkey affected 9.0.3 Not specified
CNA Valkey-io Valkey affected 9.0.4 Not specified
CNA Valkey-io Valkey affected 9.0.5 Not specified
CNA Valkey-io Valkey affected 9.1.0 Not specified
CNA Valkey-io Valkey affected 9.1.1 Not specified

References

ReferenceSourceLinkTags
vuldb.com/vuln/399380 [email protected] vuldb.com
github.com/valkey-io/valkey/issues/4222 [email protected] github.com
github.com/valkey-io/valkey/commit/4691888e7fab3df128f0bde5750c9fde2ae552fa [email protected] github.com
github.com/user-attachments/files/30195539/RDB.zip [email protected] github.com
github.com/valkey-io/valkey/pull/4229 [email protected] github.com
vuldb.com/submit/897659 [email protected] vuldb.com
github.com/valkey-io/valkey [email protected] github.com
vuldb.com/vuln/399380/cti [email protected] vuldb.com
vuldb.com/cve/CVE-2026-86227 [email protected] vuldb.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: VULL (VulDB User) (en)

CNA: VulDB CNA Team (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-09-06T00:00:00.000ZAdvisory disclosed
CNA2026-09-06T02:00:00.000ZVulDB entry created
CNA2026-09-06T06:13:02.000ZVulDB entry last update

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