CVE-2022-49826

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Source
https://nvd.nist.gov/vuln/detail/CVE-2022-49826
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49826.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2022-49826
Related
Published
2025-05-01T15:16:06Z
Modified
2025-05-02T14:45:48.830796Z
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved:

ata: libata-transport: fix double atahostput() in atatportadd()

In the error path in atatportadd(), when calling putdevice(), atatport_release() is called, it will put the refcount of 'ap->host'.

And then atahostput() is called again, the refcount is decreased to 0, atahostrelease() is called, all ports are freed and set to null.

When unbinding the device after failure, atahoststop() 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 : atahoststop+0x3c/0x84 [libata] lr : releasenodes+0x64/0xd0 Call trace: atahoststop+0x3c/0x84 [libata] releasenodes+0x64/0xd0 devresreleaseall+0xbc/0x1b0 deviceunbindcleanup+0x20/0x70 reallyprobe+0x158/0x320 _driverprobedevice+0x84/0x120 driverprobedevice+0x44/0x120 _driverattach+0xb4/0x220 busforeachdev+0x78/0xdc driverattach+0x2c/0x40 busadddriver+0x184/0x240 driverregister+0x80/0x13c _pciregisterdriver+0x4c/0x60 ahcipcidriver_init+0x30/0x1000 [ahci]

Fix this by removing redundant atahostput() in the error path.

References

Affected packages

Debian:11 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.10.158-1

Affected versions

5.*

5.10.46-4
5.10.46-5
5.10.70-1~bpo10+1
5.10.70-1
5.10.84-1
5.10.92-1~bpo10+1
5.10.92-1
5.10.92-2
5.10.103-1~bpo10+1
5.10.103-1
5.10.106-1
5.10.113-1
5.10.120-1~bpo10+1
5.10.120-1
5.10.127-1
5.10.127-2~bpo10+1
5.10.127-2
5.10.136-1
5.10.140-1
5.10.148-1
5.10.149-1
5.10.149-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.0.10-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.0.10-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}