CVE-2026-64111

A flaw was found in the Linux kernel's Security Module LSM. A local attacker could exploit this vulnerability by leveraging an improper handling of a credential guard mutex in the lsmsetselfattr function. This oversight may allow the attacker to bypass security restrictions enforced by modules su...

CVE-2026-64111 lsm: hold cred_guard_mutex for lsm_set_self_attr()

In the Linux kernel, the following vulnerability has been resolved: lsm: hold credguardmutex for lsmsetselfattr Just as procpidattrwrite already does before calling the LSM hook. This only matters for SELinux and AppArmor which check whether the process is being ptraced and if so, whether to allo...

CVE-2026-64111

The CVE-2026-64111 issue affects the Linux kernel where lsm_set_self_attr() did not hold cred_guard_mutex in the same way as proc_pid_attr_write() before calling the LSM hook. The fix ensures the mutex is held, reducing risk related to SELinux and AppArmor decisions based on whether a process is ...