Usbredir: usbredir: unbounded iso_packet_desc[] index in usbredirhost_iso_packet() leads to heap out-of-bounds write
Products / packages Red Hat Enterprise Linux 10 · Red Hat Enterprise Linux 6 · Red Hat Enterprise Linux 7 · 2 more
Published
Severity and exploitation
KEV coverage does not rule out exploitation.
Assessment vector
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:HSeverity
medium4.1CVSS measures technical severity, not the likelihood of an attack.
Known exploitation
Not listed in the checked CISA KEV catalog
Absence from CISA KEV does not rule out attacks.
Public exploit
Not established by this record
Missing evidence does not mean no public exploit exists.
Remediation
Source guidance available
Review the recorded instructions. Guidance may be a workaround rather than a fixed version.
What this means
A heap out-of-bounds write flaw in usbredir affects Red Hat Enterprise Linux 7, 8, 9, and 10. The flaw occurs when starting an isochronous OUT stream with a transfer count of 1. A usbredir peer may write past the end of the packet descriptor array.
Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.Attack conditions
No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.
Review supporting sources →Affected versions
Check the exact model, release, and any platform requirements against your installation.
Red Hat · redhat
Red Hat Enterprise Linux 10
0 ranges
Red Hat · redhat
Red Hat Enterprise Linux 10
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Other versions: affected
Product identifiers (CPE)
cpe:/a:redhat:enterprise_linux:10Red Hat · redhat
Red Hat Enterprise Linux 6
0 ranges
Red Hat · redhat
Red Hat Enterprise Linux 6
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Other versions: unknown
Product identifiers (CPE)
cpe:/o:redhat:rhel_els:6Red Hat · redhat
Red Hat Enterprise Linux 7
0 ranges
Red Hat · redhat
Red Hat Enterprise Linux 7
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Other versions: affected
Product identifiers (CPE)
cpe:/o:redhat:rhel_els:7Red Hat · redhat
Red Hat Enterprise Linux 8
0 ranges
Red Hat · redhat
Red Hat Enterprise Linux 8
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Other versions: affected
Product identifiers (CPE)
cpe:/a:redhat:enterprise_linux:8Red Hat · redhat
Red Hat Enterprise Linux 9
0 ranges
Red Hat · redhat
Red Hat Enterprise Linux 9
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Other versions: affected
Product identifiers (CPE)
cpe:/a:redhat:enterprise_linux:9What to do
Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.
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.
cve.new guidance unless attributed to a publisher. This page does not inspect your installation.
Public exploit evidence
No public exploit reference is identified in the imported evidence. This is not a claim that no exploit exists.
Original source description
Read the full publisher 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.
References
2 sourcesInside the record
Evidence available
Describes the evidence in this view, not whether the product is safe.
Original records
CVE-2026-92382View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.
cve.new JSON →Underlying weaknesses
The source’s classification of what caused the vulnerability.
Contributing organizations · 2
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Additional data publisher
Timeline
All times UTCAdvisory published
Publication date supplied by the source.
Source updated
Latest modification date supplied by the source.
Last imported by cve.new
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What changed
Follow changesLarge field values are marked as truncated previews. Original source snapshots remain retained.