CVE-2022-48828

MEDIUM EPSS 16.3%
Published Jul 16, 20241y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Jul 16, 2024 1y ago
Last Modified Jun 17, 2026 2w ago

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().

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
16.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-191

Affected Products 7

VendorProductVersionRange
linuxlinux_kernel* <5.4.295
linuxlinux_kernel*≥5.5  –  <5.10.220
linuxlinux_kernel*≥5.11  –  <5.15.24
linuxlinux_kernel*≥5.16  –  <5.16.10
linuxlinux_kernel5.17any
linuxlinux_kernel5.17any
linuxlinux_kernel5.17any

References 7

  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-265688.html
  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-355557.html
  • git.kernel.org https://git.kernel.org/stable/c/38d02ba22e43b6fc7d291cf724bc6e3b7be6626b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8e0ecaf7a7e57b30284d6b3289cc436100fadc48
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d2211e6e34d0755f35e2f8c22d81999fa81cfc71
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/da22ca1ad548429d7822011c54cfe210718e0aa7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e6faac3f58c7c4176b66f63def17a34232a17b0e
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/38d02ba22e43b6fc7d291cf724bc6e3b7be6626b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8e0ecaf7a7e57b30284d6b3289cc436100fadc48
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d2211e6e34d0755f35e2f8c22d81999fa81cfc71
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/da22ca1ad548429d7822011c54cfe210718e0aa7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e6faac3f58c7c4176b66f63def17a34232a17b0e
    Patch