CVE-2022-48828 Affecting kernel-headers package, versions <0:4.18.0-305.138.1.el8_4


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.05% (18th percentile)

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  • Snyk IDSNYK-RHEL8-KERNELHEADERS-7682517
  • published14 Aug 2024
  • disclosed16 Jul 2024

Introduced: 16 Jul 2024

CVE-2022-48828  (opens in a new tab)

How to fix?

Upgrade RHEL:8 kernel-headers to version 0:4.18.0-305.138.1.el8_4 or higher.
This issue was patched in RHSA-2024:5266.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-headers package and not the kernel-headers package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

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 Scores

version 3.1