Valkey: TLS pending-data processing use-after-free may allow remote code execution

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-56684
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-18 15:16:55 UTC
Updated2026-08-19 04:17:24 UTC
DescriptionValkey is a distributed key-value database. Prior to 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1, Valkey's tlsProcessPendingData function iterates pending_list while an authenticated client can trigger CLIENT KILL, causing connTLSClose to delete the iterator's cached next node and producing a use-after-free that can crash the server or potentially allow remote code execution when TLS is enabled. This issue is fixed in versions 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

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

EPSS: 0.008890000 probability, percentile 0.565380000 (date 2026-08-19)

Problem Types: CWE-416 | CWE-416 CWE-416: Use After Free

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Valkey-io Valkey affected < 7.2.14 Not specified
CNA Valkey-io Valkey affected >= 8.0.0, < 8.0.10 Not specified
CNA Valkey-io Valkey affected >= 8.1.0, < 8.1.9 Not specified
CNA Valkey-io Valkey affected >= 9.0.0, < 9.0.5 Not specified
CNA Valkey-io Valkey affected >= 9.1.0, < 9.1.1 Not specified

References

ReferenceSourceLinkTags
github.com/valkey-io/valkey/commit/7cd5bcb7575d750ec2de618db80da58680a10fe3 [email protected] github.com
github.com/valkey-io/valkey/releases/tag/8.0.10 [email protected] github.com
github.com/valkey-io/valkey/releases/tag/7.2.14 [email protected] github.com
github.com/valkey-io/valkey/security/advisories/GHSA-53mc-f3m3-99vh [email protected] github.com
github.com/valkey-io/valkey/releases/tag/9.1.1 [email protected] github.com
github.com/valkey-io/valkey/releases/tag/9.0.5 [email protected] github.com
github.com/valkey-io/valkey/releases/tag/8.1.9 [email protected] github.com
github.com/valkey-io/valkey/pull/4234 [email protected] github.com
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