CVE-2022-49879

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Source
https://nvd.nist.gov/vuln/detail/CVE-2022-49879
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49879.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2022-49879
Related
Published
2025-05-01T15:16:12Z
Modified
2025-05-02T14:49:58.144456Z
Summary
[none]
Details

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

ext4: fix BUGON() when directory entry has invalid reclen

The reclen field in the directory entry has to be a multiple of 4. A corrupted filesystem image can be used to hit a BUG() in ext4reclentodisk(), called from makeindexed_dir().

------------[ cut here ]------------ kernel BUG at fs/ext4/ext4.h:2413! ... RIP: 0010:makeindexeddir+0x53f/0x5f0 ... Call Trace: <TASK> ? adddirenttobuf+0x1b2/0x200 ext4addentry+0x36e/0x480 ext4addnondir+0x2b/0xc0 ext4create+0x163/0x200 pathopenat+0x635/0xe90 dofilpopen+0xb4/0x160 ? _createobject.isra.0+0x1de/0x3b0 ? _rawspinunlock+0x12/0x30 dosysopenat2+0x91/0x150 _x64sysopen+0x6c/0xa0 dosyscall64+0x3c/0x80 entrySYSCALL64afterhwframe+0x46/0xb0

The fix simply adds a call to ext4checkdir_entry() to validate the directory entry, returning -EFSCORRUPTED if the entry is invalid.

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
5.10.158-1

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
5.10.127-1
5.10.127-2~bpo10+1
5.10.127-2
5.10.136-1
5.10.140-1
5.10.148-1
5.10.149-1
5.10.149-2

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
6.0.8-1

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
6.0.8-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}