In the Linux kernel, the following vulnerability has been resolved:
media: dvb-usb: fix memory leak in dvb_usb_adapter_init()
Syzbot reports a memory leak in "dvb_usb_adapter_init()". The leak is due to not accounting for and freeing current iteration's adapter->priv in case of an error. Currently if an error occurs, it will exit before incrementing "num_adapters_initalized", which is used as a reference counter to free all adap->priv in "dvb_usb_adapter_exit()". There are multiple error paths that can exit from before incrementing the counter. Including the error handling paths for "dvb_usb_adapter_stream_init()", "dvb_usb_adapter_dvb_init()" and "dvb_usb_adapter_frontend_init()" within "dvb_usb_adapter_init()".
This means that in case of an error in any of these functions the current iteration is not accounted for and the current iteration's adap->priv is not freed.
Fix this by freeing the current iteration's adap->priv in the "stream_init_err:" label in the error path. The rest of the (accounted for) adap->priv objects are freed in dvb_usb_adapter_exit() as expected using the num_adapters_initalized variable.
Syzbot report:
BUG: memory leak unreferenced object 0xffff8881172f1a00 (size 512): comm "kworker/0:2", pid 139, jiffies 4294994873 (age 10.960s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff844af012>] dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:75 [inline] [<ffffffff844af012>] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:184 [inline] [<ffffffff844af012>] dvb_usb_device_init.cold+0x4e5/0x79e drivers/media/usb/dvb-usb/dvb-usb-init.c:308 [<ffffffff830db21d>] dib0700_probe+0x8d/0x1b0 drivers/media/usb/dvb-usb/dib0700_core.c:883 [<ffffffff82d3fdc7>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396 [<ffffffff8274ab37>] call_driver_probe drivers/base/dd.c:542 [inline] [<ffffffff8274ab37>] really_probe.part.0+0xe7/0x310 drivers/base/dd.c:621 [<ffffffff8274ae6c>] really_probe drivers/base/dd.c:583 [inline] [<ffffffff8274ae6c>] __driver_probe_device+0x10c/0x1e0 drivers/base/dd.c:752 [<ffffffff8274af6a>] driver_probe_device+0x2a/0x120 drivers/base/dd.c:782 [<ffffffff8274b786>] __device_attach_driver+0xf6/0x140 drivers/base/dd.c:899 [<ffffffff82747c87>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:427 [<ffffffff8274b352>] __device_attach+0x122/0x260 drivers/base/dd.c:970 [<ffffffff827498f6>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:487 [<ffffffff82745cdb>] device_add+0x5fb/0xdf0 drivers/base/core.c:3405 [<ffffffff82d3d202>] usb_set_configuration+0x8f2/0xb80 drivers/usb/core/message.c:2170 [<ffffffff82d4dbfc>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238 [<ffffffff82d3f49c>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293 [<ffffffff8274ab37>] call_driver_probe drivers/base/dd.c:542 [inline] [<ffffffff8274ab37>] really_probe.part.0+0xe7/0x310 drivers/base/dd.c:621 [<ffffffff8274ae6c>] really_probe drivers/base/dd.c:583 [inline] [<ffffffff8274ae6c>] __driver_probe_device+0x10c/0x1e0 drivers/base/dd.c:752
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Dec 9, 2025 | Dec 9, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernelUpgrade bpftoolUpgrade python3-perfUpgrade kernel-abi-stablelistsUpgrade kernel-tools-libsUpgrade kernel-tools | Mar 10, 2026 | Mar 10, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Dec 8, 2025 |
| Ubuntu | — | Upgrade linux-oracle-5.15Upgrade linux-azure-fde-5.15Upgrade linux-gcp-fipsUpgrade linux-azure-fipsUpgrade linux-gcpUpgrade linux-gcp-5.4Upgrade linux-nvidia-tegra-5.15Upgrade linux-hwe-5.4Upgrade linux-fipsUpgrade linux-gkeUpgrade linux-riscv-5.15Upgrade linux-intel-iot-realtimeUpgrade linux-ibm-5.4Upgrade linux-gkeopUpgrade linux-oracle-5.4Upgrade linuxUpgrade linux-aws-fipsUpgrade linux-azure-5.15Upgrade linux-awsUpgrade linux-azure-4.15Upgrade linux-oracleUpgrade linux-aws-5.4Upgrade linux-bluefieldUpgrade linux-lowlatencyUpgrade linux-hwe-5.15Upgrade linux-raspi-5.4Upgrade linux-ibmUpgrade linux-hweUpgrade linux-nvidiaUpgrade linux-azureUpgrade linux-realtimeUpgrade linux-aws-5.15Upgrade linux-azure-5.4Upgrade linux-intel-iotgUpgrade linux-gcp-4.15Upgrade linux-intel-iotg-5.15Upgrade linux-raspiUpgrade linux-kvmUpgrade linux-iotUpgrade linux-lowlatency-hwe-5.15Upgrade linux-xilinx-zynqmpUpgrade linux-aws-hweUpgrade linux-gcp-5.15 | Dec 10, 2025 | Dec 8, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Dec 8, 2025 |
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