CVE-2024-50153 scsi: target: core: Fix null-ptr-deref in target_alloc_device()
A null pointer dereference in the Linux kernel SCSI target module can cause a system crash during device allocation failures.
- 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-2024-50153?
CVE-2024-50153 is a medium-severity vulnerability in Linux kernel, published on 7 Nov 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: target: core: Fix null-ptr-deref in target_alloc_device()
There is a null-ptr-deref issue reported by KASAN:
BUG: KASAN: null-ptr-deref in target_alloc_device+0xbc4/0xbe0 [target_core_mod] ... kasan_report+0xb9/0xf0 target_alloc_device+0xbc4/0xbe0 [target_core_mod] core_dev_setup_virtual_lun0+0xef/0x1f0 [target_core_mod] target_core_init_configfs+0x205/0x420 [target_core_mod] do_one_initcall+0xdd/0x4e0 ... entry_SYSCALL_64_after_hwframe+0x76/0x7e
In target_alloc_device(), if allocing memory for dev queues fails, then dev will be freed by dev->transport->free_device(), but dev->transport is not initialized at that time, which will lead to a null pointer reference problem.
Fixing this bug by freeing dev with hba->backend->ops->free_device().
Weakness: CWE-476
Which versions are affected by CVE-2024-50153?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-50153?
Apply the vendor's patch.
Is CVE-2024-50153 being exploited?
There is no known exploitation of CVE-2024-50153 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-52937, AZL-52997, BELL-CVE-2024-50153, DEBIAN-CVE-2024-50153, GHSA-fwfj-54vh-4r92, UBUNTU-CVE-2024-50153.