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.

Project Subscriptions

Vendors Products
Debian Linux Subscribe
Fedoraproject Subscribe
Linux Kernel Subscribe
Enterprise Linux Subscribe
Rhev Hypervisor Subscribe
Advisories
Source ID Title
Debian DLA Debian DLA DLA-3623-1 linux-5.10 security update
Debian DSA Debian DSA DSA-5480-1 linux security update
Debian DSA Debian DSA DSA-5492-1 linux security update
EUVD EUVD EUVD-2023-54072 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.
Ubuntu USN Ubuntu USN USN-6343-1 Linux kernel (OEM) vulnerabilities
Ubuntu USN Ubuntu USN USN-6385-1 Linux kernel (OEM) vulnerabilities
Ubuntu USN Ubuntu USN USN-6412-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6416-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6416-2 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6416-3 Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN Ubuntu USN USN-6417-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6445-1 Linux kernel (Intel IoTG) vulnerabilities
Ubuntu USN Ubuntu USN USN-6445-2 Linux kernel (Intel IoTG) vulnerabilities
Ubuntu USN Ubuntu USN USN-6466-1 Linux kernel (NVIDIA) vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2025-11-14T14:26:31.571Z

Reserved: 2023-08-06T15:05:48.734Z

Link: CVE-2023-4194

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2023-08-07T14:15:11.743

Modified: 2024-11-21T08:34:35.687

Link: CVE-2023-4194

cve-icon Redhat

Severity : Low

Publid Date: 2023-08-03T00:00:00Z

Links: CVE-2023-4194 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses