CVE-2021-47456

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Source
https://nvd.nist.gov/vuln/detail/CVE-2021-47456
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-47456.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2021-47456
Downstream
Related
Published
2024-05-22T07:15:10Z
Modified
2025-07-01T13:10:38.136060Z
Summary
[none]
Details

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

can: peakpci: peakpci_remove(): fix UAF

When remove the module peek_pci, referencing 'chan' again after releasing 'dev' will cause UAF.

Fix this by releasing 'dev' later.

The following log reveals it:

[ 35.961814 ] BUG: KASAN: use-after-free in peakpciremove+0x16f/0x270 [peakpci] [ 35.963414 ] Read of size 8 at addr ffff888136998ee8 by task modprobe/5537 [ 35.965513 ] Call Trace: [ 35.965718 ] dumpstacklvl+0xa8/0xd1 [ 35.966028 ] printaddressdescription+0x87/0x3b0 [ 35.966420 ] kasanreport+0x172/0x1c0 [ 35.966725 ] ? peakpciremove+0x16f/0x270 [peakpci] [ 35.967137 ] ? traceirqenablercuidle+0x10/0x170 [ 35.967529 ] ? peakpciremove+0x16f/0x270 [peakpci] [ 35.967945 ] _asanreportload8noabort+0x14/0x20 [ 35.968346 ] peakpciremove+0x16f/0x270 [peakpci] [ 35.968752 ] pcideviceremove+0xa9/0x250

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
5.10.84-1

Affected versions

5.*

5.10.46-4
5.10.46-5
5.10.70-1~bpo10+1
5.10.70-1

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
5.14.16-1

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
5.14.16-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}