CVE-2022-48828

MediumCVSS 5.5/10Last modified Oct 14, 2026

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'm about to fix up the NFSv3 behavior as well, so let's catch the underflow in the common code path: nfsd_setattr().

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-191

Affected software

VendorProductVersions
LinuxLinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < d2211e6e34d0755f35e2f8c22d81999fa81cfc71; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 38d02ba22e43b6fc7d291cf724bc6e3b7be6626b; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 8e0ecaf7a7e57b30284d6b3289cc436100fadc48; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < da22ca1ad548429d7822011c54cfe210718e0aa7; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < e6faac3f58c7c4176b66f63def17a34232a17b0e
LinuxLinux2.6.12
SiemensSIMATIC S7-1500 TM MFP - GNU/Linux subsystem< V1.1.1

References

Timeline

Published
Jul 16, 2024
Last modified
Oct 14, 2026
NVD status
Modified

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CVE-2022-48828: Medium severity, CVSS 5.5 | Vulnix