CVE-2023-4194
MEDIUM
MEDIUM
Priority: 0.01
BB Relevance:
36/100
Published: 2023-08-07
Modified: 2026-11-03
First seen: 2026-11-02
Status: active
Attack Surface
Low Complexity
No Interaction
Integ. Impact
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
Low
UI:
None
S:
Unchanged
C:
None
I:
High
A:
None
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.
Weakness Classification (2)
Affected Software (12)
| Vendor | Product | Version |
|---|---|---|
| debian | debian_linux | 10.0 |
| debian | debian_linux | 11.0 |
| debian | debian_linux | 12.0 |
| fedoraproject | fedora | 37 |
| fedoraproject | fedora | 38 |
| linux | linux_kernel | < 6.4 |
| linux | linux_kernel | 6.5 |
| linux | linux_kernel | 6.5 |
| linux | linux_kernel | 6.5 |
| linux | linux_kernel | 6.5 |
| redhat | enterprise_linux | 8.0 |
| redhat | enterprise_linux | 9.0 |
References & Advisories (12)
vendor-advisory
x_refsource_REDHAT
vdb-entry
x_refsource_REDHAT
issue-tracking
x_refsource_REDHAT