DEBIAN-CVE-2022-50334

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Source
https://security-tracker.debian.org/tracker/CVE-2022-50334
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50334.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2022-50334
Upstream
Published
2025-09-15T15:15:45.677Z
Modified
2025-11-20T10:16:25.425645Z
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved: hugetlbfs: fix null-ptr-deref in hugetlbfsparseparam() Syzkaller reports a null-ptr-deref bug as follows: ====================================================== KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] RIP: 0010:hugetlbfsparseparam+0x1dd/0x8e0 fs/hugetlbfs/inode.c:1380 [...] Call Trace: <TASK> vfsparsefsparam fs/fscontext.c:148 [inline] vfsparsefsparam+0x1f9/0x3c0 fs/fscontext.c:129 vfsparsefsstring+0xdb/0x170 fs/fscontext.c:191 genericparsemonolithic+0x16f/0x1f0 fs/fscontext.c:231 donewmount fs/namespace.c:3036 [inline] pathmount+0x12de/0x1e20 fs/namespace.c:3370 domount fs/namespace.c:3383 [inline] _dosysmount fs/namespace.c:3591 [inline] _sesysmount fs/namespace.c:3568 [inline] _x64sysmount+0x27f/0x300 fs/namespace.c:3568 dosyscallx64 arch/x86/entry/common.c:50 [inline] dosyscall64+0x35/0xb0 arch/x86/entry/common.c:80 entrySYSCALL64afterhwframe+0x63/0xcd [...] </TASK> ====================================================== According to commit "vfs: parse: deal with zero length string value", kernel will set the param->string to null pointer in vfsparsefsstring() if fs string has zero length. Yet the problem is that, hugetlbfsparseparam() will dereference the param->string, without checking whether it is a null pointer. To be more specific, if hugetlbfsparseparam() parses an illegal mount parameter, such as "size=,", kernel will constructs struct fsparameter with null pointer in vfsparsefsstring(), then passes this struct fsparameter to hugetlbfsparseparam(), which triggers the above null-ptr-deref bug. This patch solves it by adding sanity check on param->string in hugetlbfsparseparam().

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
5.10.178-1

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
5.10.158-1
5.10.158-2
5.10.162-1

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
6.1.4-1

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
6.1.4-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:14 / 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
6.1.4-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}