CVE-2022-48931

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Source
https://nvd.nist.gov/vuln/detail/CVE-2022-48931
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-48931.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2022-48931
Related
Published
2024-08-22T04:15:16Z
Modified
2024-09-18T03:22:40.413440Z
Severity
  • 4.7 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

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

configfs: fix a race in configfs{,un}registersubsystem()

When configfsregistersubsystem() or configfsunregistersubsystem() is executing linkgroup() or unlinkgroup(), it is possible that two processes add or delete list concurrently. Some unfortunate interleavings of them can cause kernel panic.

One of cases is: A --> B --> C --> D A <-- B <-- C <-- D

 delete list_head *B        |      delete list_head *C

--------------------------------|----------------------------------- configfsunregistersubsystem | configfsunregistersubsystem unlinkgroup | unlinkgroup unlinkobj | unlinkobj listdelinit | listdelinit _listdelentry | _listdelentry _listdel | _listdel // next == C | next->prev = prev | | next->prev = prev prev->next = next | | // prev == B | prev->next = next

Fix this by adding mutex when calling linkgroup() or unlinkgroup(), but parent configfssubsystem is NULL when configitem is root. So I create a mutex configfssubsystemmutex.

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
5.10.103-1

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

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
5.16.12-1

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
5.16.12-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}