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.
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2023-08-07T13:19:44.215Z

Updated: 2024-09-16T11:03:53.522Z

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: 2024-09-06T18:15:05.413

Link: CVE-2023-4194

cve-icon Redhat

Severity : Low

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

Links: CVE-2023-4194 - Bugzilla