What is CVE-2023-4194?

CVE-2023-4194 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10. CVE-2023-4194 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-4194?

CVE-2023-4194 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

Is there a patch available for CVE-2023-4194?

No patch is currently available for CVE-2023-4194. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2023-4194 actively exploited?

CVE-2023-4194 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-4194

Medium

A flaw was found in the Linux kernel's TUN/TAP functionality. This issue could allow a local user to bypass network filters and gain unauthorized access to some resources. The original patches fixing CVE-2023-1076 are incorrect or incomplete. The problem is that the following upstream commits - a096ccca6e50 ("tun: tun_chr_open(): correctly initialize socket uid"), - 66b2c338adce ("tap: tap_open(): correctly initialize socket uid"), pass "inode->i_uid" to sock_init_data_uid() as the last parameter and that turns out to not be accurate.

Package Linux Kernel

Published 2023-08-07

Last modified 2026-03-24

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

High

Availability

None

Vector string

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

Weakness type

CWE-843

CVE-2023-4194 is classified as CWE-843

See CWE-843 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2023-4194 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Red Hat
https://access.redhat.com/errata/RHSA-2023:6583

Third Party Advisory
Red Hat
https://access.redhat.com/security/cve/CVE-2023-4194

Third Party Advisory
Red Hat
https://bugzilla.redhat.com/show_bug.cgi?id=2229498

Issue Tracking Third Party Advisory
Debian Security
https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
Lists
https://lists.fedoraproject.org/archives/list/[email protected]/message/344H6HO6SSC4KT7PDFXSDIXKMKHISSGF/
Lists
https://lists.fedoraproject.org/archives/list/[email protected]/message/3TYLSJ2SAI7RF56ZLQ5CQWCJLVJSD73Q/
Security
https://security.netapp.com/advisory/ntap-20231027-0002/
Debian Security
https://www.debian.org/security/2023/dsa-5480
Debian Security
https://www.debian.org/security/2023/dsa-5492
Kernel patch commit
https://lore.kernel.org/all/[email protected]/
Patch
Kernel patch commit
https://lore.kernel.org/all/[email protected]/
Patch
Kernel patch commit
https://lore.kernel.org/all/[email protected]/
Patch

Details

CVE ID CVE-2023-4194

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2023-08-07

Modified 2026-03-24

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2023-4194?

CVE-2023-4194 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . CVE-2023-4194 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-4194?

CVE-2023-4194 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.
Is there a patch available for CVE-2023-4194?

No patch is currently available for CVE-2023-4194. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2023-4194 actively exploited?

No — CVE-2023-4194 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.