CVE-2022-49826

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Source
https://cve.org/CVERecord?id=CVE-2022-49826
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49826.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2022-49826
Downstream
Related
Published
2025-05-01T14:09:46Z
Modified
2026-08-12T03:30:34Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
ata: libata-transport: fix double ata_host_put() in ata_tport_add()
Details

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.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49826.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
2623c7a5f2799569d8bb05eb211da524a8144cb3
Fixed
30e12e2be27ac6c4be2af4163c70db381364706f
Fixed
bec9ded5404cb14e5f5470103d0973a2ff83d6a5
Fixed
ac471468f7c16cda2525909946ca13ddbcd14000
Fixed
377ff82c33c0cb74562a353361b64b33c09562cf
Fixed
865a6da40ba092c18292ae5f6194756131293745
Fixed
8c76310740807ade5ecdab5888f70ecb6d35732e

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49826.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
4.17.0
Fixed
4.19.267
Type
ECOSYSTEM
Events
Introduced
4.20.0
Fixed
5.4.225
Type
ECOSYSTEM
Events
Introduced
5.5.0
Fixed
5.10.156
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.80
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.0.10

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49826.json"