Riskcovery

CVE-2026-74530

Bluetooth: hci_sync: hold conn in hci_connect_big_sync() callback

State
Published
Severity
8.8 High
Published
Aug 15, 2026
Updated
Oct 21, 2026
Reserved
Aug 15, 2026

Read the record on cve.org

Description

In 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.

Scores

CVSSScoreVectorSource
3.18.8 HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 620810ac1f7f1133a9ac403e132b3ad6995ddf39 to before 117d8bcaf1abc348185e8ab6a4ba9f8f516849a0Affected
  • 024421cf39923927ab2b5fe895d1d922b9abe67f to before ff5625d27415ace5667bf87ebc16c3a0a98db22fAffected
  • 024421cf39923927ab2b5fe895d1d922b9abe67f to before 2d91e6244b69d752503b2d44020d8b0e323dbd38Affected
  • 024421cf39923927ab2b5fe895d1d922b9abe67f to before 56e78b670356caab0b607e8aad4cf819a1909d07Affected
  • ee0586ad64a805eaf1a9a10100e908627a561e34Affected
  • 6.12.28 to before 6.12.114Affected
  • 6.14.6 to before 6.15Affected
LinuxLinux
  • 6.15Affected
  • before 6.15Not affected
  • 6.12.114 through 6.12.*Not affected
  • 6.18.57 through 6.18.*Not affected
  • 7.1.8 through 7.1.*Not affected
  • 7.2 and laterNot affected

References

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