kernel: x86: local privesc due to bad_iret and paranoid entry incompatibility

A flaw was found in the way the Linux kernel handled GS segment register base switching when recovering from a SS stack segment fault on an erroneous return to user space. A local, unprivileged user could use this flaw to escalate their privileges on the system...

kernel: x86: local privesc due to bad_iret and paranoid entry incompatibility

A flaw was found in the way the Linux kernel handled GS segment register base switching when recovering from a SS stack segment fault on an erroneous return to user space. A local, unprivileged user could use this flaw to escalate their privileges on the system...