CVE-2023-4194
Medium
Description
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.
SeverityMedium
CVSS5.5
Exploit probability—
Product
Linux Kernel
PublishedAug 7, 2023
First seenAug 7, 2023
Weakness typeCWE-843CWE-843
How to fix
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | v ≤ 6.4, 6.5 | — |
| redhat enterprise_linux | 8.0, 9.0 | — |
| fedoraproject fedora | 37, 38 | — |
| debian debian_linux | 10.0, 11.0, 12.0 | — |
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