In the Linux kernel, the following vulnerability has been resolved:
ata: libata-transport: fix double ata_host_put() in ata_tport_add()
In the error path in ata_tport_add(), when calling put_device(), ata_tport_release() is called, it will put the refcount of 'ap->host'.
And then ata_host_put() is called again, the refcount is decreased to 0, ata_host_release() is called, all ports are freed and set to null.
When unbinding the device after failure, ata_host_stop() is called to release the resources, it leads a null-ptr-deref(), because all the ports all freed and null.
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008 CPU: 7 PID: 18671 Comm: modprobe Kdump: loaded Tainted: G E 6.1.0-rc3+ #8 pstate: 80400009 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : ata_host_stop+0x3c/0x84 [libata] lr : release_nodes+0x64/0xd0 Call trace: ata_host_stop+0x3c/0x84 [libata] release_nodes+0x64/0xd0 devres_release_all+0xbc/0x1b0 device_unbind_cleanup+0x20/0x70 really_probe+0x158/0x320 __driver_probe_device+0x84/0x120 driver_probe_device+0x44/0x120 __driver_attach+0xb4/0x220 bus_for_each_dev+0x78/0xdc driver_attach+0x2c/0x40 bus_add_driver+0x184/0x240 driver_register+0x80/0x13c __pci_register_driver+0x4c/0x60 ahci_pci_driver_init+0x30/0x1000 [ahci]
Fix this by removing redundant ata_host_put() in the error path.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade bpftool-debuginfoUpgrade kernel-headersUpgrade kernel-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-livepatch-5.15.86-53.137Upgrade kernel-tools-debuginfoUpgrade kernelUpgrade perf-debuginfoUpgrade python-perf-debuginfoUpgrade kernel-toolsUpgrade python-perfUpgrade kernel-livepatch-5.10.157-139.675Upgrade kernel-tools-develUpgrade kernel-debuginfo-common-aarch64Upgrade perfUpgrade kernel-develUpgrade bpftool | Jun 23, 2025 | May 1, 2025 |
| Debian | — | Upgrade linux | May 5, 2025 | May 1, 2025 |
| Huawei Euleros 2_0_sp10 | — | Upgrade kernel-abi-stablelistsUpgrade kernel-toolsUpgrade kernelUpgrade kernel-tools-libsUpgrade python3-perf | Sep 15, 2025 | Aug 9, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade bpftoolUpgrade kernel-abi-stablelistsUpgrade kernelUpgrade kernel-tools-libsUpgrade python3-perfUpgrade kernel-tools | Aug 13, 2025 | Aug 9, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | May 1, 2025 |
| Ubuntu | — | Upgrade linux-gcpUpgrade linux-aws-fipsUpgrade linux-fipsUpgrade linux-intel-iotg-5.15Upgrade linux-riscv-5.15Upgrade linux-xilinx-zynqmpUpgrade linux-oracleUpgrade linux-intel-iotgUpgrade linux-gkeopUpgrade linux-oracle-5.15Upgrade linux-azure-5.15Upgrade linux-intel-iot-realtimeUpgrade linux-ibmUpgrade linux-raspiUpgrade linux-aws-5.15Upgrade linux-gcp-5.15Upgrade linux-aws-5.4Upgrade linux-kvmUpgrade linux-realtimeUpgrade linux-oracle-5.4Upgrade linux-lowlatencyUpgrade linux-gkeUpgrade linux-nvidiaUpgrade linux-azure-fipsUpgrade linux-awsUpgrade linux-gcp-fipsUpgrade linux-lowlatency-hwe-5.15Upgrade linux-bluefieldUpgrade linux-azure-5.4Upgrade linux-hwe-5.4Upgrade linux-nvidia-tegra-5.15Upgrade linux-ibm-5.4Upgrade linux-azureUpgrade linux-iotUpgrade linux-raspi-5.4Upgrade linux-gcp-5.4Upgrade linux-hwe-5.15Upgrade linux | May 6, 2025 | May 1, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | May 1, 2025 |
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