CVE-2021-4157
Last modified
CVE-2021-4157 is a high-severity vulnerability rated 8/10 on the CVSS scale. 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.. EPSS estimates a 1.60% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.0, < 4.4.269 |
| Linux | Linux Kernel | >= 4.5, < 4.9.269 |
| Linux | Linux Kernel | >= 4.10, < 4.14.233 |
| Linux | Linux Kernel | >= 4.15, < 4.19.191 |
| Linux | Linux Kernel | >= 4.20, < 5.4.120 |
| Linux | Linux Kernel | >= 5.5, < 5.10.38 |
| Linux | Linux Kernel | >= 5.11, < 5.11.22 |
| Linux | Linux Kernel | >= 5.12, < 5.12.5 |
| Fedoraproject | Fedora | 35 |
| Netapp | H300e Firmware | All versions |
| Netapp | H300s Firmware | All versions |
| Netapp | H500e Firmware | All versions |
| Netapp | H500s Firmware | All versions |
| Netapp | H700e Firmware | All versions |
| Netapp | H700s Firmware | All versions |
| Netapp | H410s Firmware | All versions |
| Oracle | Communications Cloud Native Core Binding Support Function | 22.1.1 |
| Oracle | Communications Cloud Native Core Binding Support Function | 22.1.3 |
| Oracle | Communications Cloud Native Core Binding Support Function | 22.2.0 |
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2034342Issue Tracking, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220602-0007/Third Party Advisory
- https://www.oracle.com/security-alerts/cpujul2022.htmlThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2034342Issue Tracking, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220602-0007/Third Party Advisory
- https://www.oracle.com/security-alerts/cpujul2022.htmlThird Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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