CVE-2026-77797

Velociraptor Prefetch parser out of bounds

Published Sep 24, 2026 CVSS 3.1 · 3.6 Low EPSS < 1% KEV · Not listed
Description
Velociraptor's prefetch library contains an out of bound vulnerability which may cause a crash when parsing certain malformed prefetch files.

Remediation

Vendor Workaround

This issue can result in a client crash. Usually clients will restart after a crash and resume normal operations. Users can collect the raw prefetch files without parsing them on the client for further analysis on the server.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Rapid7
Rapid7 velociraptor
Vendors & Products Rapid7
Rapid7 velociraptor
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Velociraptor's prefetch library contains an out of bound vulnerability which may cause a crash when parsing certain malformed prefetch files.
Title Velociraptor Prefetch parser out of bounds
Weaknesses CWE-125
CWE-20
References
Metrics cvssV3_1

{'score': 3.6, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
rapid7
Published
Updated
Sep 29, 2026, 10:39 AM
Reserved
Aug 21, 2026, 1:21 PM
Status
Awaiting Analysis
Published
Sep 24, 2026, 2:18 PM
Modified
Sep 24, 2026, 9:00 PM