CVE-2026-89762

In the Linux kernel, the following vulnerability has been resolved: apparmor: fix cred UAF caused by begincurrentlabelcritsection AppArmor's begincurrentlabelcritsection is a scary function called from lots of LSM hooks in particular VFS/socket-related ones that checks if the label referenced by...

CVE-2026-89762

CVE-2026-89762 affects the Linux kernel 's AppArmor LSM module. The root cause is a Use-After-Free (UAF) of struct cred introduced by begin_current_label_crit_section(), which replaces credentials during VFS/socket LSM hooks. When overridden credentials are active, the replacement can corrupt ref...

PT-2026-90058

In the Linux kernel, the following vulnerability has been resolved: smack: fix cred UAF in smack file send sigiotask When inspecting the credentials of another task, objective credentials -real cred, accessed with task cred must always be used. Accessing -cred on a non-current task is forbidden...

PT-2026-90478

In the Linux kernel, the following vulnerability has been resolved: apparmor: fix cred UAF caused by begin current label crit section AppArmor's begin current label crit section is a scary function called from lots of LSM hooks in particular VFS/socket-related ones that checks if the label...

Linux 5.6 Cred Refcount Overflow

Linux 5.6 suffers from a cred refcount overflow at approximately 39 gigs of memory usage via iouring. see also my related prior bug reports about overflowing refcounts with lots of RAM usage: https://crbug.com/project-zero/809: BPF program refcount, with 32GiB RAM...