Description
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.
Published: 2026-09-21
Score: 4.1 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Workaround

If USB redirection is not a required feature, consider removing the `usbredir` package. This action will eliminate the attack surface but may affect functionality that relies on USB device redirection, particularly in virtualized environments.

Tracking

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Advisories

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History

Mon, 21 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Mon, 21 Sep 2026 17:30:00 +0000

Type Values Removed Values Added
Title usbredir: usbredir: unbounded iso_packet_desc[] index in usbredirhost_iso_packet() leads to heap out-of-bounds write Usbredir: usbredir: unbounded iso_packet_desc[] index in usbredirhost_iso_packet() leads to heap out-of-bounds write
First Time appeared Redhat
Redhat enterprise Linux
CPEs cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:6
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
References

Fri, 18 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
Description 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.
Title usbredir: usbredir: unbounded iso_packet_desc[] index in usbredirhost_iso_packet() leads to heap out-of-bounds write
Weaknesses CWE-787
References
Metrics threat_severity

None

cvssV3_1

{'score': 4.1, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate


Subscriptions

Redhat Enterprise Linux
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-09-21T20:45:08.748Z

Reserved: 2026-09-16T08:00:35.754Z

Link: CVE-2026-92382

cve-icon Vulnrichment

Updated: 2026-09-21T19:40:38.780Z

cve-icon NVD

Status : Received

Published: 2026-09-21T18:17:14.593

Modified: 2026-09-21T21:17:16.360

Link: CVE-2026-92382

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-09-17T12:20:57Z

Links: CVE-2026-92382 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-21T18:45:18Z

Weaknesses