In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: ISO: drop ISO_END frames received without prior ISO_START
ISO data PDUs carry a packet-boundary flag indicating START, CONT, END or SINGLE. The ISO_CONT branch of iso_recv() guards against a missing ISO_START by checking conn->rx_len before touching conn->rx_skb, but ISO_END does not.
If a peer sends an ISO_END as the first packet on a fresh ISO connection, conn->rx_skb is still NULL and conn->rx_len is zero, so skb_put(conn->rx_skb, ...) dereferences NULL and oopses. For BIS, where receivers sync to a broadcaster without pairing, any broadcaster on the air can trigger this.
Mirror the ISO_CONT check at the top of ISO_END so a stray end fragment is logged and dropped instead of crashing the host.
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 20, 2026 | Jul 20, 2026 |
| Redhat_linux | — | No solution exists | Jul 21, 2026 | Jul 19, 2026 |
| Ubuntu | — | Upgrade linux-image-6.8.0-1067-gcpUpgrade linux-image-7.0.0-1009-azure-fdeUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-7.0.0-1009-awsUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-azure-fdeUpgrade linux-image-nvidia-6.8Upgrade linux-image-oracle-64k-7.0Upgrade linux-image-7.0.0-1014-azureUpgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-nvidia-lowlatencyUpgrade linux-image-realtimeUpgrade linux-image-gcp-64k-6.8Upgrade linux-image-6.8.0-1062-gke-64kUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-virtualUpgrade linux-image-gcp-6.8Upgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-raspi-realtime-7.0Upgrade linux-image-generic-lpaeUpgrade linux-image-6.8.0-1062-nvidia-lowlatencyUpgrade linux-image-7.0.0-1008-oracle-64kUpgrade linux-image-nvidia-tegra-rtUpgrade linux-image-aws-64k-7.0Upgrade linux-image-6.8.0-1061-oracle-64kUpgrade linux-image-azure-fipsUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-1035-nvidia-tegraUpgrade linux-image-6.8.0-1062-gkeUpgrade linux-image-nvidia-tegra-rt-6.8Upgrade linux-image-aws-7.0Upgrade linux-image-ibm-lts-24.04Upgrade linux-image-6.8.0-2053-raspi-realtimeUpgrade linux-image-gcp-7.0Upgrade linux-image-kvmUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-fipsUpgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-6.8.1-1059-realtimeUpgrade linux-image-7.0.0-1015-raspi-realtimeUpgrade linux-image-azure-fde-7.0Upgrade linux-image-awsUpgrade linux-image-7.0.0-1011-gcpUpgrade linux-image-oracleUpgrade linux-image-lowlatency-6.8Upgrade linux-image-6.8.0-139-lowlatency-64kUpgrade linux-image-generic-64k-6.8Upgrade linux-image-ibm-6.8Upgrade linux-image-gcp-lts-24.04Upgrade linux-image-gke-64kUpgrade linux-image-raspi-7.0Upgrade linux-image-6.8.0-1067-gcp-fipsUpgrade linux-image-6.8.0-1064-ibmUpgrade linux-image-raspi-6.8Upgrade linux-image-6.8.0-1049-gkeopUpgrade linux-image-xilinx-6.8Upgrade linux-image-raspiUpgrade linux-image-nvidia-bos-7.0Upgrade linux-image-gcp-fips-6.8Upgrade linux-image-gcp-fipsUpgrade linux-image-7.0.0-1010-ibmUpgrade linux-image-nvidia-tegra-6.8Upgrade linux-image-6.8.0-139-genericUpgrade linux-image-7.0.0-1016-nvidiaUpgrade linux-image-nvidiaUpgrade linux-image-6.8.0-139-fipsUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-nvidia-7.0Upgrade linux-image-intel-iotgUpgrade linux-image-generic-6.8Upgrade linux-image-genericUpgrade linux-image-gcp-64kUpgrade linux-image-intel-iot-realtimeUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-nvidia-64k-hwe-26.04Upgrade linux-image-gcpUpgrade linux-image-fips-6.8Upgrade linux-image-7.0.0-2016-nvidia-bos-64kUpgrade linux-image-7.0.0-2016-nvidia-bosUpgrade linux-image-7.0.0-1009-aws-64kUpgrade linux-image-6.8.0-1067-azureUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-oracle-64kUpgrade linux-image-6.8.0-1062-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-1035-nvidia-tegra-rtUpgrade linux-image-gkeUpgrade linux-image-7.0.0-1010-azureUpgrade linux-image-7.0.0-1008-oracleUpgrade linux-image-6.8.0-1062-nvidia-64kUpgrade linux-image-xilinxUpgrade linux-image-raspi-realtime-6.8Upgrade linux-image-ibmUpgrade linux-image-gke-6.8Upgrade linux-image-6.8.0-1062-nvidiaUpgrade linux-image-6.8.0-1036-xilinxUpgrade linux-image-nvidia-bos-64k-7.0Upgrade linux-image-lowlatencyUpgrade linux-image-7.0.0-1016-nvidia-64kUpgrade linux-image-6.8.0-1061-oracleUpgrade linux-image-oracle-7.0Upgrade linux-image-aws-64kUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-oracle-64k-6.8Upgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-nvidia-64kUpgrade linux-image-lowlatency-64kUpgrade linux-image-azure-fips-6.8Upgrade linux-image-7.0.0-1015-raspiUpgrade linux-image-6.8.0-139-lowlatencyUpgrade linux-image-6.8.0-1064-raspiUpgrade linux-image-virtual-6.8Upgrade linux-image-raspi-realtimeUpgrade linux-image-gcp-64k-7.0Upgrade linux-image-azure-6.8Upgrade linux-image-6.8.0-139-generic-64kUpgrade linux-image-ibm-7.0Upgrade linux-image-nvidia-64k-7.0Upgrade linux-image-azure-lts-24.04Upgrade linux-image-ibm-classicUpgrade linux-image-gkeopUpgrade linux-image-azure-7.0Upgrade linux-image-azureUpgrade linux-image-oracle-6.8Upgrade linux-image-nvidia-tegraUpgrade linux-image-nvidia-bos-64kUpgrade linux-image-nvidia-bosUpgrade linux-image-6.8.0-1067-gcp-64kUpgrade linux-image-realtime-hwe-22.04Upgrade linux-image-realtime-6.8.1Upgrade linux-image-laptop-23.10Upgrade linux-image-gkeop-6.8Upgrade linux-image-gke-64k-6.8Upgrade linux-image-generic-64kUpgrade linux-image-7.0.0-1011-gcp-64kUpgrade linux-image-6.8.0-1067-azure-fipsUpgrade linux-image-nvidia-hwe-26.04 | Jul 21, 2026 | Jul 20, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jul 27, 2026 | Jul 19, 2026 |
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