High severity · published Mar 25, 2022
CVE-2021-4157
An out of memory bounds write flaw (1 or 2 bytes of memory) in the Linux kernel NFS subsystem was found in the way users use mirroring (replication of files with NFS)
8.0
CVSS
1.6%
EPSS
No
On KEV
Description
An out of memory bounds write flaw (1 or 2 bytes of memory) in the Linux kernel NFS subsystem was found in the way users use mirroring (replication of files with NFS). A user, having access to the NFS mount, could potentially use this flaw to crash the system or escalate privileges on the system.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Adjacent
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.6% · higher than 75% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
4.0 before 4.4.269; 4.5 before 4.9.269; 4.10 before 4.14.233; 4.15 before 4.19.191; 4.20 before 5.4.120; 5.5 before 5.10.38; +2 more · source: NVD
CC
Communications Cloud Native Core Binding Support Function · Oracle
22.1.1; 22.1.3; 22.2.0 · source: NVD
FE
Fedora · Fedoraproject
35 · source: NVD
HF
H300e Firmware · Netapp
All versions, or not specified · source: NVD
HF
H300s Firmware · Netapp
All versions, or not specified · source: NVD
HF
H410s Firmware · Netapp
All versions, or not specified · source: NVD
HF
H500e Firmware · Netapp
All versions, or not specified · source: NVD
HF
H500s Firmware · Netapp
All versions, or not specified · source: NVD
HF
H700e Firmware · Netapp
All versions, or not specified · source: NVD
HF
H700s Firmware · Netapp
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-4157
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-4157
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2034342
lore.kernel.org
https://lore.kernel.org/lkml/20210517140244.822185482%40linuxfoundation.org/
Third Party Advisory
https://security.netapp.com/advisory/ntap-20220602-0007/
Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.html
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