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

12 total
Showing 5 of 12 references View all on NVD

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?

    Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2023-4194 patch availability.

  • 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.

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