CVE-2021-47095

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Source
https://nvd.nist.gov/vuln/detail/CVE-2021-47095
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47095.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2021-47095
Related
Published
2024-03-04T18:15:07Z
Modified
2024-09-18T03:17:19.037307Z
Summary
[none]
Details

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

ipmi: ssif: initialize ssif_info->client early

During probe ssif_info->client is dereferenced in error path. However, it is set when some of the error checking has already been done. This causes following kernel crash if an error path is taken:

[ 30.645593][ T674] ipmissif 0-000e: ipmissif: Not probing, Interface already present [ 30.657616][ T674] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000088 ... [ 30.657723][ T674] pc : _devprintk+0x28/0xa0 [ 30.657732][ T674] lr : deverr+0x7c/0xa0 ... [ 30.657772][ T674] Call trace: [ 30.657775][ T674] _devprintk+0x28/0xa0 [ 30.657778][ T674] deverr+0x7c/0xa0 [ 30.657781][ T674] ssifprobe+0x548/0x900 [ipmissif 62ce4b08badc1458fd896206d9ef69a3c31f3d3e] [ 30.657791][ T674] i2cdeviceprobe+0x37c/0x3c0 ...

Initialize ssifinfo->client before any error path can be taken. Clear i2cclient data in the error path to prevent the dangling pointer from leaking.

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
5.10.92-1

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

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
5.15.15-1

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
5.15.15-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}