CVE-2022-4378

Name: CVE-2022-4378
Creator: NVD / NIST
Published: 2023-01-05T16:15:11.84+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.43%

Last modified Jun 17, 2026

CVE-2022-4378 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A stack overflow flaw was found in the Linux kernel's SYSCTL subsystem in how a user changes certain kernel parameters and variables. This flaw allows a local user to crash or potentially escalate their privileges on the system.. EPSS estimates a 0.43% chance of exploitation in the next 30 days.

Description

A stack overflow flaw was found in the Linux kernel's SYSCTL subsystem in how a user changes certain kernel parameters and variables. This flaw allows a local user to crash or potentially escalate their privileges on the system.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.43%

34.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	>= 4.9.0, <= 4.9.337
Linux	Linux Kernel	>= 4.14.0, <= 4.14.302
Linux	Linux Kernel	>= 4.19.0, <= 4.19.269
Linux	Linux Kernel	>= 5.4.0, <= 5.4.228
Linux	Linux Kernel	>= 5.10.0, <= 5.10.162
Linux	Linux Kernel	>= 5.15.0, <= 5.15.86
Linux	Linux Kernel	>= 6.0.0, <= 6.0.11

References

http://packetstormsecurity.com/files/171289/Kernel-Live-Patch-Security-Notice-LNS-0092-1.html
https://bugzilla.redhat.com/show_bug.cgi?id=2152548Issue Tracking, Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/queue-6.0/proc-avoid-integer-type-confusion-in-get_proc_long.patchVendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/queue-6.0/proc-proc_skip_spaces-shouldn-t-think-it-is-working-on-c-strings.patchVendor Advisory
https://seclists.org/oss-sec/2022/q4/178Mailing List, Third Party Advisory
http://packetstormsecurity.com/files/171289/Kernel-Live-Patch-Security-Notice-LNS-0092-1.html
https://bugzilla.redhat.com/show_bug.cgi?id=2152548Issue Tracking, Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/queue-6.0/proc-avoid-integer-type-confusion-in-get_proc_long.patchVendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/queue-6.0/proc-proc_skip_spaces-shouldn-t-think-it-is-working-on-c-strings.patchVendor Advisory
https://seclists.org/oss-sec/2022/q4/178Mailing List, Third Party Advisory

Timeline

Published: Jan 5, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-4378?

How severe is CVE-2022-4378?

CVE-2022-4378 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.43% probability of exploitation in the next 30 days.

How do I fix CVE-2022-4378?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-4378?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST