CVE-2021-47342

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Source
https://nvd.nist.gov/vuln/detail/CVE-2021-47342
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47342.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2021-47342
Related
Published
2024-05-21T15:15:20Z
Modified
2024-09-18T03:17:25.723636Z
Summary
[none]
Details

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

ext4: fix possible UAF when remounting r/o a mmp-protected file system

After commit 618f003199c6 ("ext4: fix memory leak in ext4fillsuper"), after the file system is remounted read-only, there is a race where the kmmpd thread can exit, causing sbi->smmptsk to point at freed memory, which the call to ext4stopmmpd() can trip over.

Fix this by only allowing kmmpd() to exit when it is stopped via ext4stopmmpd().

Bug-Report-Link: 20210629143603.2166962-1-yebin10@huawei.com

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
5.14.6-1

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
5.14.6-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}