CVE-2024-49852 scsi: elx: libefc: Fix potential use after free in efc_nport_vport_del()
A use-after-free vulnerability in the Linux kernel's libefc SCSI driver allows attackers to potentially execute arbitrary code or escalate privileges.
- 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-2024-49852?
CVE-2024-49852 is a high-severity use after free vulnerability in Linux kernel, published on 21 Oct 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
scsi: elx: libefc: Fix potential use after free in efc_nport_vport_del()
The kref_put() function will call nport->release if the refcount drops to zero. The nport->release release function is _efc_nport_free() which frees "nport". But then we dereference "nport" on the next line which is a use after free. Re-order these lines to avoid the use after free.
Weakness: CWE-416
Which versions are affected by CVE-2024-49852?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-49852?
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-2024-49852 being exploited?
There is no known exploitation of CVE-2024-49852 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-50739, AZL-50918, BELL-CVE-2024-49852, DEBIAN-CVE-2024-49852, GHSA-5w8m-6wwq-mm8m, UBUNTU-CVE-2024-49852.