CVEvulnerability
CVE-2023-4194
5.5 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2023-08-07
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
- CVSS 3.1 ([email protected])
- 5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
- Weaknesses
- CWE-843, CWE-863
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.
Affected configurations
• linux linux kernel (<= 6.4)
• linux linux kernel 6.5
• redhat enterprise linux 8.0
• redhat enterprise linux 9.0
• fedoraproject fedora 37
• fedoraproject fedora 38
• debian debian linux 10.0
• debian debian linux 11.0
• debian debian linux 12.0
Related
References
- https://access.redhat.com/errata/RHSA-2023:6583 Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2023-4194 Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2229498 Issue Tracking, Third Party 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]/ Mailing List, Patch, Vendor Advisory
- https://access.redhat.com/errata/RHSA-2023:6583 Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2023-4194 Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2229498 Issue Tracking, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html lists.debian.org
- https://lists.fedoraproject.org/archives/list/[email protected]/message/344H6HO6SSC4KT7PDFXSDIXKMKHISSGF/ lists.fedoraproject.org
- https://lists.fedoraproject.org/archives/list/[email protected]/message/3TYLSJ2SAI7RF56ZLQ5CQWCJLVJSD73Q/ lists.fedoraproject.org
- 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]/ Mailing List, Patch, Vendor Advisory
- https://security.netapp.com/advisory/ntap-20231027-0002/ security.netapp.com
- https://www.debian.org/security/2023/dsa-5480 www.debian.org
- https://www.debian.org/security/2023/dsa-5492 www.debian.org