Out-of-Bounds Write Vulnerability in usbredir Affects Multiple Platforms
CVE-2026-92382

4.1MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Vendor
CVE Published:
21 September 2026

What is CVE-2026-92382?

A critical flaw has been identified in usbredir, specifically an out-of-bounds write issue. This vulnerability occurs when initiating an isochronous OUT stream with a transfer count of one. The stream's single transfer buffer is left permanently unsubmitted, which bypasses the crucial bounds check in usbredirhost_iso_packet(). Consequently, this allows a usbredir peer to overwrite data beyond the packet descriptor array on every isochronous packet, potentially leading to data corruption and instability in affected systems.

References

https://access.redhat.com/security/cve/CVE-2026-92382
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2535972
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
4.1
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
High
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Calif.io for reporting this issue.
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