Unbounded Memory Allocation in VQLResponse Result-Set Writer

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Summary

CVECVE-2026-6948
StatePUBLISHED
Assignerrapid7
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-04 00:16:39 UTC
Updated2026-05-04 00:16:39 UTC
DescriptionVelociraptor versions prior to 0.76.4 contain a resource exhaustion vulnerability in the server's agent control channel. This allows a compromised or rogue Velociraptor client to crash the server via out-of-memory (OOM) by sending crafted messages through the normal client communication channel.

Risk And Classification

Primary CVSS: v3.1 4.9 MEDIUM from [email protected]

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

Problem Types: CWE-770 | CWE-770 CWE-770 Allocation of resources without limits or throttling

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.9MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
3.1CNACVSS4.9MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Rapid7 Velociraptor affected 0.76.4 custom Linux
CNA Rapid7 Velociraptor affected 0.75.9 custom Linux

References

ReferenceSourceLinkTags
docs.velociraptor.app/announcements/advisories/cve-2026-6948 [email protected] docs.velociraptor.app
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: We thank Faisal Alhumaid ([email protected]) for reporting this issue responsibly. (en)

CNA: We also thank Mika Jarvinen ([email protected]) for reporting this issue responsibly at the same time. (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-04-19T14:00:00.000ZInitial report by Faisal Alhumaid
CNA2026-04-19T14:00:00.000ZInitial report by Mika Jarvinen
CNA2026-04-27T23:50:00.000ZAdvisory published and patch distributed

Solutions

CNA: To remediate, you will need to  upgrade your server https://www.velociraptor-docs.org/docs/deployment/server/upgrades/#upgrading-a-server-in-place-upgrade  to the latest version of your release: * For 0.76 releases, upgrade immediately to  v0.76.4 https://github.com/Velocidex/velociraptor/releases/download/v0.76/velociraptor-v0.76.4-linux-amd64 * For 0.75 releases, upgrade immediately to  v0.75.9 https://github.com/Velocidex/velociraptor/releases/download/v0.75/velociraptor-v0.75.9-linux-amd64

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