CVE-2023-3111 Use after free in Kernel
A use-after-free flaw in the Linux Kernel btrfs filesystem allows local attackers to potentially execute code or escalate privileges via specific ioctl calls.
- 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-2023-3111?
CVE-2023-3111 is a high-severity use after free vulnerability in Debian Debian Linux, published on 5 Jun 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A use after free vulnerability was found in prepare_to_relocate in fs/btrfs/relocation.c in btrfs in the Linux Kernel. This possible flaw can be triggered by calling btrfs_ioctl_balance() before calling btrfs_ioctl_defrag().
Weakness: CWE-416
Which versions are affected by CVE-2023-3111?
It affects 7 products.
Products include Debian Debian Linux, Linux kernel, Netapp H300s Firmware, Netapp H410c Firmware, Netapp H410s Firmware, Netapp H500s Firmware and 1 more.
How do I fix CVE-2023-3111?
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-2023-3111 being exploited?
There is no known exploitation of CVE-2023-3111 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as AZL-27087, DEBIAN-CVE-2023-3111, GHSA-7cgf-2cw6-4pvm, UBUNTU-CVE-2023-3111.