FKIE_CVE-2023-4194
Vulnerability from fkie_nvd - Published: 2023-08-07 14:15 - Updated: 2026-06-17 06:37
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
5.5 (Medium) - CVSS:3.1/
Summary
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.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| linux | linux_kernel | * | |
| 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 | |
| fedoraproject | fedora | 37 | |
| fedoraproject | fedora | 38 | |
| debian | debian_linux | 10.0 | |
| debian | debian_linux | 11.0 | |
| debian | debian_linux | 12.0 |
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"cpe:/o:redhat:enterprise_linux:9::baseos",
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"product": "Red Hat Enterprise Linux 9",
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"lang": "en",
"value": "A flaw was found in the Linux kernel\u0027s 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-\u003ei_uid\" to sock_init_data_uid() as the last parameter and that turns out to not be accurate."
},
{
"lang": "es",
"value": "Se ha encontrado un fallo en la funcionalidad TUN/TAP del kernel de Linux. Este problema podr\u00eda permitir a un usuario local eludir los filtros de red y obtener acceso no autorizado a algunos recursos. Los parches originales que solucionan CVE-2023-1076 son incorrectos o incompletos. El problema es que los siguientes commits upstream - a096ccca6e50 (\"tun: tun_chr_open(): inicializar correctamente el uid del socket\"), - 66b2c338adce (\"tap: tap_open(): inicializar correctamente el uid del socket\"), pasan \"inode-\u0026gt;i_uid\" a sock_init_data_uid() como \u00faltimo par\u00e1metro y resulta que no es correcto."
}
],
"id": "CVE-2023-4194",
"lastModified": "2026-06-17T06:37:17.120",
"metrics": {
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"attackVector": "LOCAL",
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"baseScore": 5.5,
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"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
"version": "3.1"
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"published": "2023-08-07T14:15:11.743",
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| Author | Source | Type | Date | Other |
|---|
Nomenclature
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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