CVE-2022-48828

Severity CVSS v4.0:

Pending analysis

Type:

CWE-191 Integer Underflow (Wrap or Wraparound)

Publication date:

16/07/2024

Last modified:

25/09/2025

Description

In the Linux kernel, the following vulnerability has been resolved: NFSD: Fix ia_size underflow iattr::ia_size is a loff_t, which is a signed 64-bit type. NFSv3 and NFSv4 both define file size as an unsigned 64-bit type. Thus there is a range of valid file size values an NFS client can send that is already larger than Linux can handle. Currently decode_fattr4() dumps a full u64 value into ia_size. If that value happens to be larger than S64_MAX, then ia_size underflows. I&#39;m about to fix up the NFSv3 behavior as well, so let&#39;s catch the underflow in the common code path: nfsd_setattr().

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

5.50

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::		5.4.295 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.5 (including)	5.10.220 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.15.24 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.16 (including)	5.16.10 (excluding)
cpe:2.3:o:linux:linux_kernel:5.17:rc1::::::
cpe:2.3:o:linux:linux_kernel:5.17:rc2::::::
cpe:2.3:o:linux:linux_kernel:5.17:rc3::::::

To consult the complete list of CPE names with products and versions, see this page

CVE-2022-48828

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools