CVE-2026-74530 PUBLISHED

Bluetooth: hci_sync: hold conn in hci_connect_big_sync() callback

Assigner: Linux
Reserved: 15.08.2026 Published: 15.08.2026 Updated: 15.08.2026

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.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 024421cf39923927ab2b5fe895d1d922b9abe67f to 2d91e6244b69d752503b2d44020d8b0e323dbd38 (excl.)
  • affected from 024421cf39923927ab2b5fe895d1d922b9abe67f to 56e78b670356caab0b607e8aad4cf819a1909d07 (excl.)
  • Version 620810ac1f7f1133a9ac403e132b3ad6995ddf39 is affected
  • Version ee0586ad64a805eaf1a9a10100e908627a561e34 is affected
  • affected from 6.12.28 to 6.13 (excl.)
  • affected from 6.14.6 to 6.15 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 6.15 is affected
  • unaffected from 0 to 6.15 (excl.)
  • unaffected from 7.1.8 to 7.1.* (incl.)
  • unaffected from 7.2-rc6 to * (incl.)

References