CVE-2026-74531

Bluetooth: hci_conn: hold conn reference in abort_conn_sync()

HIGH

8.8

CVSS Score

Published: August 15, 2026 at 12:27 PM UTC

Updated: October 16, 2026 at 08:17 PM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

HIGH8.8

Exploit prediction

EPSS 0.3%

SSVC

No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

90%

227a0cdf4a028a73dc256d0f5144b4808d718893249c88e7fb45b6b705040c5af4bd0d0f2bc9735c58afdc9b18871eb1d461c725be9e9f3f44a39aeb6.1.184 6.10.10 6.11 6.6.517fe4d391e937c2f048a43ff4b421e677f10d83c0

Vendor states this is fixed in 5761d003daa987ac81463f570713ce9c9dd204e5 (fixed)

Vendor states this is fixed in 64d1645f26aa49b5a86ba2fccd0bb6749ea725a6 (fixed)

Vendor states this is fixed in 963fb4b8e7d1ab07b4ae45bf15d41e667c88caca (fixed)

Vendor states this is fixed in e8f9fef362bab431d95371d3406bc720350290c3 (fixed)

Vendor states this is fixed in fa812cfa81aa3d4a7b6ce8277979af57b3f79712 (fixed)

Vendor states this is fixed in 6.11 (unaffected)

Vendor states this is fixed in 6.12.103 (unaffected)

Vendor states this is fixed in 6.18.44 (unaffected)

Affected range stops below 6.2, so it looks safe — our inference, not a vendor statement

Vendor states this is fixed in 6.6.151 (unaffected)

Vendor states this is fixed in 7.1.8 (unaffected)

Vendor states this is fixed in 7.2 (unaffected)