CVE-2019-13233 Use after free in n/a
A race condition in the Linux kernel allows a local attacker to trigger a use-after-free, potentially leading to code execution or privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2019-13233?
CVE-2019-13233 is a high-severity use after free vulnerability in Linux kernel, published on 4 Jul 2019. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2019-13233?
It affects 1 product.
Linux distribution packages (3)
kernel-livepatch-SLE15-SP1_Update_0 SUSE:Linux Enterprise Live Patching 15 SP1 | All versions | 5-13.2 |
kernel-livepatch-SLE15-SP1_Update_1 SUSE:Linux Enterprise Live Patching 15 SP1 | All versions | 4-2.1 |
kernel-livepatch-SLE15-SP1_Update_2 SUSE:Linux Enterprise Live Patching 15 SP1 | All versions | 3-2.1 |
Products include Linux kernel.
How do I fix CVE-2019-13233?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2019-13233 being exploited?
There is no known exploitation of CVE-2019-13233 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2019-13233, GHSA-x2j9-jf3f-5hc2, SUSE-SU-2019:2232-1, UBUNTU-CVE-2019-13233.