Linux Kernel up to 7.2-rc5 Bluetooth ISO iso_sock_disconn iso_data use after free

CVSS Meta Temp Score
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CTI Interest Score
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9.5$5k-$25k0.00

Summaryinfo

A vulnerability classified as very critical was found in Linux Kernel up to 6.6.150/6.12.102/6.18.43/7.1.7/7.2-rc5. This vulnerability affects the function iso_sock_disconn of the component Bluetooth ISO. Such manipulation of the argument iso_data leads to use after free. This vulnerability is documented as CVE-2026-74541. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.6.150/6.12.102/6.18.43/7.1.7/7.2-rc5 and classified as very critical. Affected by this issue is the function iso_sock_disconn of the component Bluetooth ISO. The manipulation of the argument iso_data with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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().

The advisory is available at git.kernel.org. This vulnerability is handled as CVE-2026-74541 since 08/15/2026. The exploitation is known to be easy. The attack may be launched remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 08/17/2026).

The vulnerability scanner Nessus provides a plugin with the ID 335844 (Linux Distros Unpatched Vulnerability : CVE-2026-74541), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.6.151, 6.12.103, 6.18.44, 7.1.8 or 7.2-rc6 eliminates this vulnerability. Applying the patch cc1d39946d62bc568551dfb81149724de1e91338/7b51a9c25e9698b64df9f2218f10eecf7dc7e2d0/63c0f396a18b767eb28e895eb95bbdce6c172c59/69a4a7b162b3db6ac337e3094cdee38f24d42ff7/d57e506f6a1e3929611340fae87c1e4823f4d85c is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at Tenable (335844). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.9
VulDB Meta Temp Score: 9.5

VulDB Base Score: 9.9
VulDB Temp Score: 9.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 335844
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-74541

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.6.151/6.12.103/6.18.44/7.1.8/7.2-rc6
Patch: cc1d39946d62bc568551dfb81149724de1e91338/7b51a9c25e9698b64df9f2218f10eecf7dc7e2d0/63c0f396a18b767eb28e895eb95bbdce6c172c59/69a4a7b162b3db6ac337e3094cdee38f24d42ff7/d57e506f6a1e3929611340fae87c1e4823f4d85c

Timelineinfo

08/15/2026 Advisory disclosed
08/15/2026 +0 days CVE reserved
08/15/2026 +0 days VulDB entry created
08/17/2026 +2 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-74541 (🔒)
GCVE (CVE): GCVE-0-2026-74541
GCVE (VulDB): GCVE-100-390866

Entryinfo

Created: 08/15/2026 15:48
Updated: 08/17/2026 09:41
Changes: 08/15/2026 15:48 (60), 08/17/2026 09:41 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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