cve/2019/CVE-2019-13233.md

CVE-2019-13233

Description

In arch/x86/lib/insn-eval.c in the Linux kernel before 5.1.9, there is a use-after-free for access to an LDT entry because of a race condition between modify_ldt() and a #BR exception for an MPX bounds violation.

POC

Reference

• http://packetstormsecurity.com/files/154408/Kernel-Live-Patch-Security-Notice-LSN-0055-1.html
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1.9
• https://usn.ubuntu.com/4117-1/
• https://usn.ubuntu.com/4118-1/

Github

• https://github.com/Sec20-Paper310/Paper310