Bluetooth: btusb: validate Realtek vendor event length

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-68339
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-10 13:20:24 UTC
Updated2026-08-17 06:17:42 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: Bluetooth: btusb: validate Realtek vendor event length btusb_recv_event_realtek() reads the event code at data[0] and the Realtek subevent code at data[2] before deciding whether to consume a vendor event as a coredump. For example, the two-byte event ff 00 contains a complete vendor-event header declaring zero parameters. The old classifier still reads a nonexistent third byte and can misclassify the event as a coredump if the adjacent byte is 0x34. Require the HCI event header and first parameter to be present before inspecting the Realtek subevent code. Short events continue through the normal HCI receive path, which owns their protocol validation.

Risk And Classification

EPSS: 0.002090000 probability, percentile 0.113200000 (date 2026-08-17)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 044014ce85a17c0b7fab8e5df0925792010c29b2 8de58bfa26e028f99271dde5a92107cd07f5e063 git Not specified
CNA Linux Linux affected 044014ce85a17c0b7fab8e5df0925792010c29b2 400267bab0f4076088e163e58cad2bb41c3cf5e7 git Not specified
CNA Linux Linux affected 044014ce85a17c0b7fab8e5df0925792010c29b2 8881daaafadbe7fb2b7341d16a3949114409c90c git Not specified
CNA Linux Linux affected 044014ce85a17c0b7fab8e5df0925792010c29b2 24b0758193d70da47ef8b979153d2a181dbdf34e git Not specified
CNA Linux Linux affected 044014ce85a17c0b7fab8e5df0925792010c29b2 df541cd485ff80a5ddc579d99687bc7506df9851 git Not specified
CNA Linux Linux affected 6.6 Not specified
CNA Linux Linux unaffected 6.6 semver Not specified
CNA Linux Linux unaffected 6.6.148 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.101 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.42 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.6 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/8de58bfa26e028f99271dde5a92107cd07f5e063 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/df541cd485ff80a5ddc579d99687bc7506df9851 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8881daaafadbe7fb2b7341d16a3949114409c90c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/400267bab0f4076088e163e58cad2bb41c3cf5e7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/24b0758193d70da47ef8b979153d2a181dbdf34e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report