🛡️ CVE-2023-4194
🟡 CVSS 5.5 — Medium ✅ No Known Exploit CWE-843 NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity MEDIUM
CVSS Score 5.5
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CWE CWE-843
Public Exploit ✅ No
Source NVD
Published 2023-08-07
Updated 2026-06-08
Modified 2026-03-24

Affected Packages

Software From version Fixed in
debian-linux — —
enterprise-linux — —
fedora — —
linux-kernel — —

References

Issue Tracking, Third Party Advisory https://bugzilla.redhat.com/show_bug.cgi?id=2229498
Mailing List, Patch, Vendor Advisory https://lore.kernel.org/all/[email protected]/
Mailing List, Patch, Vendor Advisory https://lore.kernel.org/all/[email protected]/
Mailing List, Patch, Vendor Advisory https://lore.kernel.org/all/[email protected]/
Issue Tracking, Third Party Advisory https://bugzilla.redhat.com/show_bug.cgi?id=2229498
Mailing List, Patch, Vendor Advisory https://lore.kernel.org/all/[email protected]/
Mailing List, Patch, Vendor Advisory https://lore.kernel.org/all/[email protected]/
Mailing List, Patch, Vendor Advisory https://lore.kernel.org/all/[email protected]/

Similar Threats

Site Security Check

Concerned your site may already be targeted?

BotEraser analyzes incoming traffic patterns and helps identify bot behavior consistent with known exploit attempts.

Check My Site Free →

No credit card required  ·  Results in minutes

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.