CVE-2026-74531 is a vulnerability in Linux Kernel
Published on August 15, 2026
Bluetooth: hci_conn: hold conn reference in abort_conn_sync()
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: hci_conn: hold conn reference in abort_conn_sync()
There is theoretical UAF if the conn is freed while the hci_sync task is
running.
Hold refcount to avoid that.
Products Associated with CVE-2026-74531
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Affected Versions
Linux:- Version 249c88e7fb45b6b705040c5af4bd0d0f2bc9735c and below 64d1645f26aa49b5a86ba2fccd0bb6749ea725a6 is affected.
- Version 227a0cdf4a028a73dc256d0f5144b4808d718893 and below 963fb4b8e7d1ab07b4ae45bf15d41e667c88caca is affected.
- Version 227a0cdf4a028a73dc256d0f5144b4808d718893 and below e8f9fef362bab431d95371d3406bc720350290c3 is affected.
- Version 227a0cdf4a028a73dc256d0f5144b4808d718893 and below fa812cfa81aa3d4a7b6ce8277979af57b3f79712 is affected.
- Version 227a0cdf4a028a73dc256d0f5144b4808d718893 and below 5761d003daa987ac81463f570713ce9c9dd204e5 is affected.
- Version 58afdc9b18871eb1d461c725be9e9f3f44a39aeb is affected.
- Version 6.6.51 and below 6.6.151 is affected.
- Version 6.10.10 and below 6.11 is affected.
- Version 6.11 is affected.
- Before 6.11 is unaffected.
- Version 6.6.151, <= 6.6.* is unaffected.
- Version 6.12.103, <= 6.12.* is unaffected.
- Version 6.18.44, <= 6.18.* is unaffected.
- Version 7.1.8, <= 7.1.* is unaffected.
- Version 7.2-rc6, <= * is unaffected.