CVE-2026-53251

Bluetooth: ISO: Fix not releasing hdev reference on iso_conn_big_sync

MEDIUM
5.5
CVSS Score
Published: June 25, 2026 at 08:39 AM UTC
Updated: July 8, 2026 at 05:05 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.1%

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: Fix not releasing hdev reference on iso_conn_big_sync hci_get_route() returns a reference-counted hci_dev pointer via hci_dev_hold(). The function exits normally or with an error without ever releasing it.

Affected

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

v ≥ 6.11.116.11.11 ≤ v < 6.126.12.2 ≤ v < 6.12.946.13 ≤ v < 6.18.366.13 ≤ v < 7.0.136.13 ≤ v < 7.16.19 ≤ v < 7.0.131360e5b6ce63d63d23223a659ca2bbafa30a53aa6.11.116.12.27.1 rc17.1 rc27.1 rc37.1 rc47.1 rc57.1 rc67a9342b94a91b306ed1cf6aa8254aea210764c9bfec1e55314896bf4a4cfdb3a9ad4872be9f06ed
Vendor states this is fixed in 23e8eb16820b866528fb300dc67fe3f67f00ef62 (fixed)
Vendor states this is fixed in 33d677d2e3713d98012c3dbd4a9207f7d785b854 (fixed)
Vendor states this is fixed in 4bbec25f47b930101294fd310c627c3f53e9661f (fixed)
Vendor states this is fixed in 5cbf290b79351971f20c7a533247e8d58a3f970c (fixed)
Affected range stops below 6.12, so it looks safe — our inference, not a vendor statement
Vendor states this is fixed in 6.12.94 (unaffected)
Vendor states this is fixed in 6.13 (unaffected)
Vendor states this is fixed in 6.18.36 (unaffected)
Vendor states this is fixed in 7.0.13 (unaffected)
Vendor states this is fixed in 7.1 (unaffected)

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-772

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