CVEvulnerability

CVE-2022-48828

5.5 MEDIUM Published 2024-07-16 Modified 2026-10-14 Official page ↗
Status
Modified
Published
2024-07-16
Last modified
2026-10-14
Assigner
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
9.1 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
CVSS 3.1 ([email protected])
5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-191

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().

Affected configurations

• linux linux kernel (< 5.4.295) • linux linux kernel (>= 5.5 < 5.10.220) • linux linux kernel (>= 5.11 < 5.15.24) • linux linux kernel (>= 5.16 < 5.16.10) • linux linux kernel 5.17

Related

Weakness · CWE (1)

  • CWE-191 Integer Underflow (Wrap or Wraparound) weakness

References