Linux Kernel up to 6.12.112/6.18.54/7.2.8/7.3-rc4 Bluetooth ISO CIS hci_bind_cis/hci_connect_cis/iso_chan_add allocation of resources

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.2$0-$5k1.77-

Summaryinfo

A vulnerability described as critical has been identified in Linux Kernel up to 6.12.112/6.18.54/7.2.8/7.3-rc4. The affected element is the function hci_bind_cis/hci_connect_cis/iso_chan_add of the component Bluetooth ISO CIS. Such manipulation leads to allocation of resources. This vulnerability is referenced as CVE-2026-98458. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.12.112/6.18.54/7.2.8/7.3-rc4 and classified as critical. Affected by this issue is the function hci_bind_cis/hci_connect_cis/iso_chan_add of the component Bluetooth ISO CIS. The manipulation with an unknown input leads to a allocation of resources vulnerability. Using CWE to declare the problem leads to CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. Impacted is availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: release unused CIS holds after channel attach hci_bind_cis() and hci_connect_cis() return one hci_conn hold for the ISO layer. A new channel association consumes that hold, which is eventually released by iso_conn_free(). There are two cases where iso_chan_add() does not create an association: it returns success when the socket is already attached to the same iso_conn, and it returns -EBUSY when another socket is attached. The hold returned for the current call is unused in both cases. This occurs when deferred setup calls iso_connect_cis() again for its existing socket, or when another socket attempts to reuse the CIS. Detect the idempotent case while the connection is locked and release the unused hold after iso_chan_add(). Also release it on -EBUSY. Do not drop it for other errors: a newly allocated iso_conn releases the transferred hold when its last temporary reference is put.

The advisory is available at git.kernel.org. This vulnerability is handled as CVE-2026-98458 since 09/25/2026. 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 $0-$5k at the moment (estimation calculated on 10/18/2026). This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 6.12.113, 6.18.55, 7.2.9 or 7.3-rc5 eliminates this vulnerability. Applying the patch e0e8b70207eaf27aee0a05ec5bf2d1b6bcb004d1/ed4c026cc4094dfb7a329b9d8df0ddd0be1b2458/e5fcca51177f224604e3a8c926ffd5edbeb58b09/0fcd4dad555c96e0bd3a1b8c569f989be85c7341 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Allocation of resources
CWE: CWE-770 / CWE-400 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.12.113/6.18.55/7.2.9/7.3-rc5
Patch: e0e8b70207eaf27aee0a05ec5bf2d1b6bcb004d1/ed4c026cc4094dfb7a329b9d8df0ddd0be1b2458/e5fcca51177f224604e3a8c926ffd5edbeb58b09/0fcd4dad555c96e0bd3a1b8c569f989be85c7341

Timelineinfo

09/25/2026 CVE reserved
10/18/2026 +23 days Advisory disclosed
10/18/2026 +0 days VulDB entry created
10/18/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-98458 (🔒)
GCVE (CVE): GCVE-0-2026-98458
GCVE (VulDB): GCVE-100-421790

Entryinfo

Created: 10/18/2026 17:44
Changes: 10/18/2026 17:44 (59)
Complete: 🔍
Cache ID: 216::103

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