CVE-2022-49348

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Source
https://nvd.nist.gov/vuln/detail/CVE-2022-49348
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49348.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2022-49348
Related
Published
2025-02-26T07:01:11Z
Modified
2025-02-26T19:01:13.898386Z
Summary
[none]
Details

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

ext4: filter out EXT4FCREPLAY from on-disk superblock field s_state

The EXT4FCREPLAY bit in sbi->smountstate is used to indicate that we are in the middle of replay the fast commit journal. This was actually a mistake, since the sbi->smountinfo is initialized from es->sstate. Arguably smountstate is misleadingly named, but the name is historical --- smountstate and sstate dates back to ext2.

What should have been used is the ext4{set,clear,test}mountflag() inline functions, which sets EXT4MF* bits in sbi->smount_flags.

The problem with using EXT4FCREPLAY is that a maliciously corrupted superblock could result in EXT4FCREPLAY getting set in smountstate. This bypasses some sanity checks, and this can trigger a BUG() in ext4escacheextent(). As a easy-to-backport-fix, filter out the EXT4FCREPLAY bit for now. We should eventually transition away from EXT4FCREPLAY to something like EXT4MF_REPLAY.

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
5.10.127-1

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

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
5.18.5-1

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
5.18.5-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}