CVE-2026-98110: Bluetooth: btintel: bound firmware ID by TLV length

Q: What condition is required to trigger the out-of-bounds read?

The Bluetooth Intel driver must receive a firmware ID TLV whose value lacks a NUL terminator. The driver previously treated that value as a NUL-terminated string despite the TLV length being the only valid boundary.

Q: What is the practical mitigation if an update cannot be applied immediately?

The provided data identifies the issue in the Linux kernel Bluetooth Intel driver and does not provide a configuration workaround. Avoiding exposure would require preventing the driver from processing the affected malformed firmware ID response until a fixed kernel is deployed.

Q: How can I determine whether a kernel includes the fix?

Check whether the kernel incorporates one of the referenced stable commits: aef56a2bd5aa22808ce508605d7497d2b5e8eb5f, 058f56de5f48ba4b3be01526006ac83ce9e79f39, or a07b3024a927892dd46e7dfbed438e8834e24098. The fix limits firmware ID conversion to the advertised TLV value length.

Published Sep 25, 2026

Updated

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: btintel: bound firmware ID by TLV length

The firmware ID is treated as a NUL-terminated string even though the TLV length is its only boundary. If the value does not contain a NUL terminator, snprintf() can read beyond the received response.

Limit the conversion to the advertised TLV value length.

Affected Software

141 affected componentsFixes available

Linux Linux kernel

debian/linux<6.12.111-1

6.12.111-1

debian/linux<7.2.7-1

7.2.7-1

debian/linux-6.12<6.12.111-1~deb12u1

6.12.111-1~deb12u1

linux/kernel>=6.11.0<6.12.111

6.12.111

linux/kernel>=6.13.0<6.18.53

6.18.53

linux/kernel>=6.19.0<7.2.7

7.2.7

Linux Linux kernel>=6.11<6.12.111

Linux Linux kernel>=6.13<6.18.53

Linux Linux kernel>=6.19<7.2.7

Linux Linux kernel=7.3-rc1

debian/linux<=6.12.107-1

6.1.176-16.1.190-16.12.115-27.2.12-17.2.15-1

debian/linux-6.12

6.12.113-1~deb12u1

ubuntu/linux-hwe-edge*

ubuntu/linux-aws-5.0*

ubuntu/linux-aws-5.3*

ubuntu/linux-azure*

ubuntu/linux-azure-5.3*

ubuntu/linux-azure-edge*

ubuntu/linux-gcp*

ubuntu/linux-gcp-5.3*

ubuntu/linux-gke-4.15*

ubuntu/linux-gke-5.4*

ubuntu/linux-gkeop-5.4*

ubuntu/linux-hwe*

ubuntu/linux-hwe-edge*

ubuntu/linux-oem*

ubuntu/linux-oracle-5.0*

ubuntu/linux-oracle-5.3*

ubuntu/linux-aws-5.11*

ubuntu/linux-aws-5.13*

ubuntu/linux-aws-5.8*

ubuntu/linux-azure-5.11*

ubuntu/linux-azure-5.13*

ubuntu/linux-azure-5.8*

ubuntu/linux-azure-fde*

ubuntu/linux-gcp-5.11*

ubuntu/linux-gcp-5.13*

ubuntu/linux-gcp-5.8*

ubuntu/linux-gke*

ubuntu/linux-gke-5.15*

ubuntu/linux-gkeop*

ubuntu/linux-gkeop-5.15*

ubuntu/linux-hwe-5.11*

ubuntu/linux-hwe-5.13*

ubuntu/linux-hwe-5.8*

ubuntu/linux-intel-5.13*

ubuntu/linux-oem-5.10*

ubuntu/linux-oem-5.13*

ubuntu/linux-oem-5.6*

ubuntu/linux-oracle-5.11*

ubuntu/linux-oracle-5.13*

ubuntu/linux-oracle-5.8*

ubuntu/linux-raspi2*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.11*

ubuntu/linux-riscv-5.8*

ubuntu/linux-allwinner-5.19*

ubuntu/linux-aws-5.19*

ubuntu/linux-aws-6.2*

ubuntu/linux-aws-6.5*

ubuntu/linux-azure-5.19*

ubuntu/linux-azure-6.2*

ubuntu/linux-azure-6.5*

ubuntu/linux-azure-fde-5.19*

ubuntu/linux-azure-fde-6.2*

ubuntu/linux-gcp-5.19*

ubuntu/linux-gcp-6.2*

ubuntu/linux-gcp-6.5*

ubuntu/linux-hwe-5.19*

ubuntu/linux-hwe-6.2*

ubuntu/linux-hwe-6.5*

ubuntu/linux-intel-iot-realtime*

ubuntu/linux-lowlatency-hwe-5.19*

ubuntu/linux-lowlatency-hwe-6.2*

ubuntu/linux-lowlatency-hwe-6.5*

ubuntu/linux-nvidia-6.2*

ubuntu/linux-nvidia-6.5*

ubuntu/linux-oem-5.17*

ubuntu/linux-oem-6.0*

ubuntu/linux-oem-6.1*

ubuntu/linux-oem-6.5*

ubuntu/linux-oracle-6.5*

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.19*

ubuntu/linux-riscv-6.5*

ubuntu/linux-starfive-5.19*

ubuntu/linux-starfive-6.2*

ubuntu/linux-starfive-6.5*

ubuntu/linux-aws-6.14*

ubuntu/linux-aws-6.17*

ubuntu/linux-aws-7.0*

ubuntu/linux-azure-6.11*

ubuntu/linux-azure-6.14*

ubuntu/linux-azure-6.17*

ubuntu/linux-azure-7.0*

ubuntu/linux-azure-fde-6.14*

ubuntu/linux-azure-fde-6.17*

ubuntu/linux-azure-fde-7.0*

ubuntu/linux-azure-nvidia-6.14*

ubuntu/linux-gcp-6.11*

ubuntu/linux-gcp-6.14*

ubuntu/linux-gcp-7.0*

ubuntu/linux-hwe-6.11*

ubuntu/linux-hwe-6.14*

ubuntu/linux-hwe-6.17*

ubuntu/linux-hwe-7.0<7.0.0-42.42~24.04.1

7.0.0-42.42~24.04.1

ubuntu/linux-lowlatency-hwe-6.11*

ubuntu/linux-nvidia-6.11*

ubuntu/linux-nvidia-6.17*

ubuntu/linux-nvidia-7.0*

ubuntu/linux-oem-6.11*

ubuntu/linux-oem-6.14*

ubuntu/linux-oem-6.17*

ubuntu/linux-oem-6.8*

ubuntu/linux-oracle-6.14*

ubuntu/linux-oracle-6.17*

ubuntu/linux-oracle-7.0*

ubuntu/linux-raspi-realtime*

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-riscv-6.14*

ubuntu/linux-riscv-6.17*

ubuntu/linux-riscv-7.0<7.0.0-42.42.1~24.04.1

7.0.0-42.42.1~24.04.1

ubuntu/linux-realtime-6.14*

ubuntu/linux-realtime-6.17*

ubuntu/linux<7.0.0-42.42

7.0.0-42.42

ubuntu/linux-aws<7.0.0-1016.17

7.0.0-1016.17

ubuntu/linux-azure*

ubuntu/linux-azure-fde*

ubuntu/linux-gcp<7.0.0-1016.18

7.0.0-1016.18

ubuntu/linux-gke*

ubuntu/linux-ibm<7.0.0-1017.17

7.0.0-1017.17

ubuntu/linux-nvidia*

ubuntu/linux-nvidia-bos*

ubuntu/linux-oem-7.0<7.0.0-1017.17

7.0.0-1017.17

ubuntu/linux-oracle<7.0.0-1015.16

7.0.0-1015.16

ubuntu/linux-raspi*

ubuntu/linux-realtime*

ubuntu/linux-riscv<7.0.0-42.42.1

7.0.0-42.42.1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade debian/linux to a version that resolves this vulnerability.
Fixed in 6.12.111-1
Upgrade
Upgrade debian/linux to a version that resolves this vulnerability.
Fixed in 7.2.7-1
Upgrade
Upgrade debian/linux-6.12 to a version that resolves this vulnerability.
Fixed in 6.12.111-1~deb12u1
Upgrade
Upgrade linux/Kernel to a version that resolves this vulnerability.
Fixed in 6.12.111
Upgrade
Upgrade linux/Kernel to a version that resolves this vulnerability.
Fixed in 6.18.53
Upgrade
Upgrade linux/Kernel to a version that resolves this vulnerability.
Fixed in 7.2.7
Upgrade
Upgrade debian/linux to a version that resolves this vulnerability.
Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.115-2Fixed in 7.2.12-1Fixed in 7.2.15-1
Upgrade
Upgrade debian/linux-6.12 to a version that resolves this vulnerability.
Fixed in 6.12.113-1~deb12u1
Upgrade
Upgrade ubuntu/linux-hwe-7.0 to a version that resolves this vulnerability.
Fixed in 7.0.0-42.42~24.04.1
Upgrade
Upgrade ubuntu/linux-riscv-7.0 to a version that resolves this vulnerability.
Fixed in 7.0.0-42.42.1~24.04.1
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 7.0.0-42.42
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 7.0.0-1016.17
Upgrade
Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 7.0.0-1016.18
Upgrade
Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.
Fixed in 7.0.0-1017.17
Upgrade
Upgrade ubuntu/linux-oem-7.0 to a version that resolves this vulnerability.
Fixed in 7.0.0-1017.17
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 7.0.0-1015.16
Upgrade
Upgrade ubuntu/linux-riscv to a version that resolves this vulnerability.
Fixed in 7.0.0-42.42.1

Event History

Sep 25, 2026

CVE Published

via MITRE·10:35 AM

Data Sourced

via MITRE·10:35 AM

Description

Data Sourced

via OSV·10:35 AM

DescriptionAffected Software

Data Sourced

via OSV·11:17 AM

Severity

Data Sourced

via NVD·11:17 AM

Description

Data Sourced

via NVD·11:17 AM

RemedySeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

DSA-6528

Peer vulnerabilities

Found alongside the following vulnerabilities.

DLA-4817-1

Frequently Asked Questions

What condition is required to trigger the out-of-bounds read?

The Bluetooth Intel driver must receive a firmware ID TLV whose value lacks a NUL terminator. The driver previously treated that value as a NUL-terminated string despite the TLV length being the only valid boundary.

What is the practical mitigation if an update cannot be applied immediately?

The provided data identifies the issue in the Linux kernel Bluetooth Intel driver and does not provide a configuration workaround. Avoiding exposure would require preventing the driver from processing the affected malformed firmware ID response until a fixed kernel is deployed.

How can I determine whether a kernel includes the fix?

Check whether the kernel incorporates one of the referenced stable commits: aef56a2bd5aa22808ce508605d7497d2b5e8eb5f, 058f56de5f48ba4b3be01526006ac83ce9e79f39, or a07b3024a927892dd46e7dfbed438e8834e24098. The fix limits firmware ID conversion to the advertised TLV value length.

CVE-2026-98110: Bluetooth: btintel: bound firmware ID by TLV length

Affected Software

Remediation

Event History

Parent advisories

Peer vulnerabilities

Frequently Asked Questions

What condition is required to trigger the out-of-bounds read?

What is the practical mitigation if an update cannot be applied immediately?

How can I determine whether a kernel includes the fix?

Company

Resources

Contact