Linux Kernel up to 6.12.111/6.18.53/7.2.7/7.3-rc3 Bluetooth Coredump hci_devcd_handle_pkt_init use after free

CVSS Meta Temp Score
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CTI Interest Score
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9.5$5k-$25k0.52+

Summaryinfo

A vulnerability categorized as very critical has been discovered in Linux Kernel up to 6.12.111/6.18.53/7.2.7/7.3-rc3. This impacts the function hci_devcd_handle_pkt_init of the component Bluetooth Coredump. Such manipulation leads to use after free. This vulnerability is referenced as CVE-2026-98295. It is possible to launch the attack remotely. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.12.111/6.18.53/7.2.7/7.3-rc3. It has been rated as very critical. Affected by this issue is the function hci_devcd_handle_pkt_init of the component Bluetooth Coredump. The manipulation 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: coredump: Quiesce dump work on unregister hci_devcd_handle_pkt_init() arms dump_timeout and coredump producers queue dump_rx without holding an hdev reference. Unregister leaves both works live, so disconnecting during an active dump lets them access hdev after hci_release_dev() frees it. Shut down coredump processing during unregister. Close the producer gate under dump_q.lock before disabling both works, then free the active buffer and queued packets under hci_dev_lock. Serializing the gate with enqueue prevents controller-specific workers from adding packets after the final purge.

The advisory is available at git.kernel.org. This vulnerability is handled as CVE-2026-98295 since 09/25/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. 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 10/06/2026).

Upgrading to version 6.12.112, 6.18.54, 7.2.8 or 7.3-rc4 eliminates this vulnerability. Applying the patch 24af375d7d8aa5f698e4dc41317102f44114351a/dcaf10ef27f928568c25de3e9fc242e538de5c67/82699d1b727ba5980b94f1eb8dc3d346f41b7c67/d236517c264e41dc09833c708ef23bccb7a91219 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

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

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.5

VulDB Base Score: 10.0
VulDB Temp Score: 9.5
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: Use after free
CWE: CWE-416 / CWE-119
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 6.12.112/6.18.54/7.2.8/7.3-rc4
Patch: 24af375d7d8aa5f698e4dc41317102f44114351a/dcaf10ef27f928568c25de3e9fc242e538de5c67/82699d1b727ba5980b94f1eb8dc3d346f41b7c67/d236517c264e41dc09833c708ef23bccb7a91219

Timelineinfo

09/25/2026 CVE reserved
10/06/2026 +11 days Advisory disclosed
10/06/2026 +0 days VulDB entry created
10/06/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-98295 (🔒)
GCVE (CVE): GCVE-0-2026-98295
GCVE (VulDB): GCVE-100-414170

Entryinfo

Created: 10/06/2026 13:22
Changes: 10/06/2026 13:22 (59)
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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