Vulnerability record/PUBLISHED/Published Sep 21, 2026 17:28:21 UTC
CVE-2026-92382
An out-of-bounds write flaw was found in usbredir. Starting an isochronous OUT stream with a transfer count of 1 leaves the stream's single transfer buffer permanently unsubmitted, defeating the bounds check in usbredirhost_iso_packet() and allowing a usbredir peer to write past the end of the packet descriptor array on every subsequent isochronous packet.
Base score4.1/ 10
SeverityMediumCVSS 3.1
Exploitability / impact
CVSS metric breakdown
Base severityMedium
Attack vectorLocalAV
Attack complexityHighAC
Privileges requiredHighPR
User interactionNoneUI
ScopeUnchangedS
Confidentiality impactNoneC
Integrity impactNoneI
Availability impactHighA
CVSS vector string
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:HCVSS communicates standardized severity and impact characteristics. It does not establish whether a system is exploitable in your specific environment.
Record context
CVE Numbering Authorityredhat
Last updatedNov 6, 2026 01:48:22 UTC
PublishedSep 21, 2026 17:28:21 UTC
ReservedSep 16, 2026 08:00:35 UTC
Credits
- Red Hat would like to thank Calif.io for reporting this issue.