CVE-2022-4378

HIGHNVD 7.87.8—

7.8

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.

CVSS v3: 7.8
EG Score: 7.8(medium)
EPSS: 9.9%
KEV: Not listed

Published

January 5, 2023

Last Modified

April 10, 2025

References (10)

secalert@redhathttp://packetstormsecurity.com/files/171289/Kernel-Live-Patch-Security-Notice-LNS-0092-1.html
secalert@redhathttps://bugzilla.redhat.com/show_bug.cgi?id=2152548
secalert@redhathttps://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.patch
secalert@redhathttps://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.patch
secalert@redhathttps://seclists.org/oss-sec/2022/q4/178
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/171289/Kernel-Live-Patch-Security-Notice-LNS-0092-1.html
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=2152548
af854a3a-2127-422b-91ae-364da2661108https://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.patch
af854a3a-2127-422b-91ae-364da2661108https://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.patch
af854a3a-2127-422b-91ae-364da2661108https://seclists.org/oss-sec/2022/q4/178

Patch Availability(22)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	linux-tools-oem-22.04b (6.0.0.1010.10) @ jammy	2026-05-25	ubuntu
ubuntu	linux-tools-5.19.0-29-generic-64k (5.19.0-29.30) @ kinetic	2026-05-25	ubuntu
redhat	redhat-virtualization-host-0:4.5.3-202306050942_8.6	2023-06-06	redhat
redhat	kpatch-patch	2023-06-05	redhat
redhat	kernel-0:4.18.0-372.57.1.el8_6	2023-05-31	redhat
redhat	kernel-0:2.6.32-754.50.1.el6	2023-04-18	redhat
redhat	kernel-0:3.10.0-957.100.1.el7	2023-04-11	redhat
redhat	kernel-0:3.10.0-693.107.1.el7	2023-04-11	redhat
redhat	kernel-rt-0:4.18.0-425.19.2.rt7.230.el8_7	2023-04-04	redhat
redhat	kernel-0:4.18.0-425.19.2.el8_7	2023-04-04	redhat
redhat	kernel-0:4.18.0-305.82.1.el8_4	2023-03-14	redhat
redhat	kernel-rt-0:4.18.0-305.82.1.rt7.154.el8_4	2023-03-14	redhat
redhat	kernel-rt-0:5.14.0-70.49.1.rt21.120.el9_0	2023-03-14	redhat
redhat	kernel-0:5.14.0-70.49.1.el9_0	2023-03-14	redhat
redhat	kernel-0:3.10.0-1160.88.1.el7	2023-03-07	redhat
redhat	kernel-rt-0:4.18.0-193.100.1.rt13.151.el8_2	2023-03-07	redhat
redhat	kernel-0:4.18.0-193.100.1.el8_2	2023-03-07	redhat
redhat	kernel-rt-0:3.10.0-1160.88.1.rt56.1233.el7	2023-03-07	redhat
redhat	kernel-0:5.14.0-162.18.1.el9_1	2023-02-28	redhat
redhat	kernel-rt-0:5.14.0-162.18.1.rt21.181.el9_1	2023-02-28	redhat
redhat	kernel-0:3.10.0-1062.71.1.el7	2023-02-28	redhat
redhat	kernel-0:4.18.0-147.80.1.el8_1	2023-02-21	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(3)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(25)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 11× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
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2026-05-29 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
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2026-05-27 13:39 UTCepss_batch
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2026-05-26 13:43 UTCepss_batch
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2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-25 09:14 UTCEG score recompute

Frequently asked(5)

What is CVE-2022-4378?

CVE-2022-4378 is a high vulnerability published on January 5, 2023. 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.

When was CVE-2022-4378 disclosed?

CVE-2022-4378 was first published in the National Vulnerability Database on January 5, 2023, with the most recent update on April 10, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2022-4378 actively exploited?

CVE-2022-4378 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 9.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2022-4378?

CVE-2022-4378 has a CVSS v3 base score of 7.8 (NVD).

How do I remediate CVE-2022-4378?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-4378, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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