CVE-2026-74541

Bluetooth: ISO: clear iso_data always when detaching conn from hcon

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 0.2%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: clear iso_data always when detaching conn from hcon When setting conn->hcon = NULL, also conn->hcon->iso_data = NULL is necessary, otherwise later iso_conn_free() will UAF. Fix clearing of iso_data in iso_sock_disconn() Fixes KASAN: slab-use-after-free in iso_conn_hold_unless_zero on iso_sock_release() followed by hci_abort_conn_sync().

Affected

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

6.5.126.6c03a10bd5b6ccb22921e04bcddc987410df7e7a9fbdc4bc47268953c80853489f696e02d61f9a2c6
Vendor states this is fixed in 63c0f396a18b767eb28e895eb95bbdce6c172c59 (fixed)
Vendor states this is fixed in 69a4a7b162b3db6ac337e3094cdee38f24d42ff7 (fixed)
Vendor states this is fixed in 7b51a9c25e9698b64df9f2218f10eecf7dc7e2d0 (fixed)
Vendor states this is fixed in cc1d39946d62bc568551dfb81149724de1e91338 (fixed)
Vendor states this is fixed in d57e506f6a1e3929611340fae87c1e4823f4d85c (fixed)
Vendor states this is fixed in 6.12.103 (unaffected)
Vendor states this is fixed in 6.18.44 (unaffected)
Vendor states this is fixed in 6.6 (unaffected)
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)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHLinux
Vector?

Quick Info

StatusRECEIVED

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