Bug 2298167 (CVE-2022-48828)

Summary:	CVE-2022-48828 kernel: NFSD: Fix ia_size underflow
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	dfreiber, drow, jburrell, vkumar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 5.10.220, kernel 5.15.24, kernel 5.16.10, kernel 5.17	Doc Type:	If docs needed, set a value
Doc Text:	A vulnerability was found in the Linux kernel's NFSD, where an underflow in the ia_size field can occur due to incorrect handling of file size types. When an NFS client sends a file size greater than the maximum value the system can handle, it can lead to an underflow in the ia_size variable, causing unpredictable behavior. This vulnerability impacts the integrity and reliability of file operations in NFS.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2024-07-16 12:49:50 UTC

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().

Comment 6 errata-xmlrpc 2024-08-13 07:26:19 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.4 Telecommunications Update Service

Via RHSA-2024:5266 https://access.redhat.com/errata/RHSA-2024:5266

Comment 7 errata-xmlrpc 2024-08-13 14:26:55 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.4 Telecommunications Update Service

Via RHSA-2024:5282 https://access.redhat.com/errata/RHSA-2024:5282

Comment 8 errata-xmlrpc 2024-08-13 14:34:05 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.6 Telecommunications Update Service

Via RHSA-2024:5281 https://access.redhat.com/errata/RHSA-2024:5281

Comment 10 errata-xmlrpc 2024-09-24 00:34:35 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Advanced Update Support

Via RHSA-2024:6992 https://access.redhat.com/errata/RHSA-2024:6992