# CVE-2022-49826: linux: In the Linux kernel, the following vulnerability has been resolved:  ata: libata-transport: fix double ata_host_put()...

CVE-2022-49826 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49826, released May 1, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-49826
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0023
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 1, 2025

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.0.10-1 | [DEBIAN-CVE-2022-49826](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49826.md) | May 1, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.0.10-1 | [DEBIAN-CVE-2022-49826](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49826.md) | May 1, 2025 |
| Linux | linux Debian 14 | 6.0.10-1 | [DEBIAN-CVE-2022-49826](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49826.md) | May 1, 2025 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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