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In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: ISO: Fix multiple init when debugfs is disabled
If bt_debugfs is not created successfully, which happens if either CONFIG_DEBUG_FS or CONFIG_DEBUG_FS_ALLOW_ALL is unset, then iso_init() returns early and does not set iso_inited to true. This means that a subsequent call to iso_init() will result in duplicate calls to proto_register(), bt_sock_register(), etc.
With CONFIG_LIST_HARDENED and CONFIG_BUG_ON_DATA_CORRUPTION enabled, the duplicate call to proto_register() triggers this BUG():
list_add double add: new=ffffffffc0b280d0, prev=ffffffffbab56250, next=ffffffffc0b280d0. ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:35! Oops: invalid opcode: 0000 [#1] PREEMPT SMP PTI CPU: 2 PID: 887 Comm: bluetoothd Not tainted 6.10.11-1-ao-desktop #1 RIP: 0010:__list_add_valid_or_report+0x9a/0xa0 ... __list_add_valid_or_report+0x9a/0xa0 proto_register+0x2b5/0x340 iso_init+0x23/0x150 [bluetooth] set_iso_socket_func+0x68/0x1b0 [bluetooth] kmem_cache_free+0x308/0x330 hci_sock_sendmsg+0x990/0x9e0 [bluetooth] __sock_sendmsg+0x7b/0x80 sock_write_iter+0x9a/0x110 do_iter_readv_writev+0x11d/0x220 vfs_writev+0x180/0x3e0 do_writev+0xca/0x100 ...
This change removes the early return. The check for iso_debugfs being NULL was unnecessary, it is always NULL when iso_inited is false.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux-6.1Upgrade linux | Nov 11, 2024 | Oct 29, 2024 |
| Redhat_linux | — | Upgrade kernelNo solution existsUpgrade kernel-rt | May 15, 2025 | Oct 29, 2024 |
| Ubuntu | — | Upgrade linux-image-6.8.0-56-lowlatency-64kUpgrade linux-image-gcpUpgrade linux-image-realtimeUpgrade linux-image-nvidia-64kUpgrade linux-image-6.11.0-1010-lowlatency-64kUpgrade linux-image-oem-22.04bUpgrade linux-image-azure-lts-24.04Upgrade linux-image-6.11.0-1005-realtimeUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-6.8.0-1021-gkeUpgrade linux-image-kvmUpgrade linux-image-oracleUpgrade linux-image-oracle-64kUpgrade linux-image-6.11.0-1011-oracle-64kUpgrade linux-image-oem-24.04aUpgrade linux-image-6.8.0-1024-nvidia-64kUpgrade linux-image-raspi-realtimeUpgrade linux-image-6.8.0-1022-oracleUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-gcp-lts-24.04Upgrade linux-image-generic-hwe-22.04Upgrade linux-image-nvidia-64k-6.8Upgrade linux-image-oem-22.04dUpgrade linux-image-6.8.0-1022-ibmUpgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-aws-lts-24.04Upgrade linux-image-nvidia-lowlatencyUpgrade linux-image-azure-fdeUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-6.11.0-1011-oracleUpgrade linux-image-azure-nvidiaUpgrade linux-image-6.8.0-56-lowlatencyUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-6.8.0-1028-raspiUpgrade linux-image-6.8.0-1025-awsUpgrade linux-image-6.8.0-1014-azure-nvidiaUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-6.8.0-1026-gcp-64kUpgrade linux-image-awsUpgrade linux-image-ibm-classicUpgrade linux-image-6.8.0-56-generic-64kUpgrade linux-image-raspiUpgrade linux-image-6.8.0-1008-gkeopUpgrade linux-image-6.8.0-57-generic-64kUpgrade linux-image-6.8.0-1024-nvidiaUpgrade linux-image-6.8.1-1018-realtimeUpgrade linux-image-6.8.0-57-genericUpgrade linux-image-6.8.0-2023-raspi-realtimeUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-6.8.0-1022-oracle-64kUpgrade linux-image-6.11.0-1015-oemUpgrade linux-image-gkeop-6.8Upgrade linux-image-6.8.0-1024-nvidia-lowlatencyUpgrade linux-image-6.11.0-1009-azure-fdeUpgrade linux-image-generic-lpaeUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-6.11.0-18-genericUpgrade linux-image-6.11.0-18-generic-64kUpgrade linux-image-lowlatencyUpgrade linux-image-6.11.0-1008-raspiUpgrade linux-image-6.11.0-1010-lowlatencyUpgrade linux-image-gkeopUpgrade linux-image-6.8.0-1027-awsUpgrade linux-image-oem-24.04bUpgrade linux-image-6.8.0-1024-oemUpgrade linux-image-genericUpgrade linux-image-nvidiaUpgrade linux-image-ibmUpgrade linux-image-generic-64kUpgrade linux-image-oem-22.04Upgrade linux-image-6.11.0-1009-gcpUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-realtime-hwe-24.04Upgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-lowlatency-64kUpgrade linux-image-6.8.0-1024-nvidia-lowlatency-64kUpgrade linux-image-oem-22.04aUpgrade linux-image-nvidia-6.8Upgrade linux-image-6.8.0-56-genericUpgrade linux-image-oem-22.04cUpgrade linux-image-6.11.0-1009-azureUpgrade linux-image-oem-24.04Upgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-6.8.0-1025-azureUpgrade linux-image-6.11.0-1009-awsUpgrade linux-image-gcp-64kUpgrade linux-image-azureUpgrade linux-image-6.8.0-1025-azure-fdeUpgrade linux-image-gkeUpgrade linux-image-virtualUpgrade linux-image-6.8.0-1026-gcpUpgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-oracle-lts-24.04Upgrade linux-image-virtual-hwe-22.04Upgrade linux-image-virtual-hwe-24.04 | Feb 20, 2025 | Oct 29, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 10, 2025 | Oct 29, 2024 |
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