Bluetooth: hci_sync: hold conn in hci_connect_big_sync() callback

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74530
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 13:17:58 UTC
Updated2026-08-17 06:19:49 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: hold conn in hci_connect_big_sync() callback There is theoretical UAF if the conn is freed while the hci_sync task is running. Hold refcount to avoid that. Handle NULL hcon, return 0 + do nothing to match the previous behavior.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001550000 probability, percentile 0.051950000 (date 2026-08-16)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary8.8HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED8.8HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 024421cf39923927ab2b5fe895d1d922b9abe67f 2d91e6244b69d752503b2d44020d8b0e323dbd38 git Not specified
CNA Linux Linux affected 024421cf39923927ab2b5fe895d1d922b9abe67f 56e78b670356caab0b607e8aad4cf819a1909d07 git Not specified
CNA Linux Linux affected 620810ac1f7f1133a9ac403e132b3ad6995ddf39 git Not specified
CNA Linux Linux affected ee0586ad64a805eaf1a9a10100e908627a561e34 git Not specified
CNA Linux Linux affected 6.12.28 6.13 semver Not specified
CNA Linux Linux affected 6.14.6 6.15 semver Not specified
CNA Linux Linux affected 6.15 Not specified
CNA Linux Linux unaffected 6.15 semver Not specified
CNA Linux Linux unaffected 7.1.8 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/56e78b670356caab0b607e8aad4cf819a1909d07 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2d91e6244b69d752503b2d44020d8b0e323dbd38 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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