Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: sysctl: move the "cad_pid" entry from pid_table[] to kern_reboot_table[] cad_pid is global, and kill_cad_pid() is only used in the root namespace. However, due to pid_table_root_permissions(), a non-root user can unshare pid/user namespaces and modify it from the child namespace. This makes no sense and is simply wrong. Move it to kern_reboot_table[] where it logically belongs; this ensures that only GLOBAL_ROOT_UID can read/modify this sysctl. Note that this patch doesn't preserve "#ifdef CONFIG_PROC_SYSCTL" around the "cad_pid"; CONFIG_PROC_SYSCTL selects CONFIG_SYSCTL, so it is always set when kern_reboot_table[] is compiled.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected e054bcbe7e7af2baad3752f1a4916a7fffc0457e before e8527de7fea191fda704792a56081f9009aeec37; affected e054bcbe7e7af2baad3752f1a4916a7fffc0457e before a09bc4eaa67e1a72df3b6d0beb3afeef1e1fdfcd; affected e054bcbe7e7af2baad3752f1a4916a7fffc0457e before 7170ca01623b399c97f2ae9d3e228badc1f25ea3 |
| Linux / Linux | affected 6.17; unaffected 0 before 6.17; unaffected 6.18.50 through 6.18.*; unaffected 7.2.4 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.