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.
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Affected Vendors & Products
References
History
Wed, 18 Feb 2026 18:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-1188 |
Fri, 22 Nov 2024 12:00:00 +0000
Fri, 06 Sep 2024 18:30:00 +0000
Status: PUBLISHED
Assigner: redhat
Published: 2023-08-07T13:19:44.215Z
Updated: 2026-02-18T17:16:51.343Z
Reserved: 2023-08-06T15:05:48.734Z
Link: CVE-2023-4194
No data.
Status : Modified
Published: 2023-08-07T14:15:11.743
Modified: 2026-02-18T18:24:16.953
Link: CVE-2023-4194