SB20260816248 - Improper access control in Linux kernel s390 net driver
Published: August 16, 2026
Security Bulletin ID
SB20260816248
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper access control (CVE-ID: CVE-2026-74467)
CWE-ID: CWE-284 - Improper Access Control
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to invoke private ioctl commands.
The vulnerability exists due to improper access control in qeth_siocdevprivate when handling SIOCDEVPRIVATE ioctl commands. A local user can invoke private ioctl commands to invoke private ioctl commands.
The issue affects the SIOC_QETH_ADP_SET_SNMP_CONTROL, SIOC_QETH_GET_CARD_TYPE, and SIOC_QETH_QUERY_OAT commands.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/4e48168825818bf4a13c743582227d15f1d30d04
- https://git.kernel.org/stable/c/93a0a846ec59a88e0c402878a15357a5ce430eb4
- https://git.kernel.org/stable/c/b40c74262f7e1e601221cebccdbdb2b392ff9976
- https://git.kernel.org/stable/c/bd63c7879eaa87f1958f7ee027813356fcd9ff11
- https://git.kernel.org/stable/c/d211028bac1bd0fff0026bfa2a8328e5b78cd0e6