CVE-2025-38274 fpga: fix potential null pointer deref in fpga_mgr_test_img_load_sgt()
A missing null check in the Linux kernel FPGA manager test function can cause a null pointer dereference, leading to a denial of service.
- 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-2025-38274?
CVE-2025-38274 is a medium-severity vulnerability in Linux kernel, published on 10 Jul 2025. 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:
fpga: fix potential null pointer deref in fpga_mgr_test_img_load_sgt()
fpga_mgr_test_img_load_sgt() allocates memory for sgt using kunit_kzalloc() however it does not check if the allocation failed. It then passes sgt to sg_alloc_table(), which passes it to __sg_alloc_table(). This function calls memset() on sgt in an attempt to zero it out. If the allocation fails then sgt will be NULL and the memset will trigger a NULL pointer dereference.
Fix this by checking the allocation with KUNIT_ASSERT_NOT_ERR_OR_NULL().
Weakness: CWE-476
Which versions are affected by CVE-2025-38274?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2025-38274?
Apply the vendor's patch.
Is CVE-2025-38274 being exploited?
There is no known exploitation of CVE-2025-38274 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-64884, BELL-CVE-2025-38274, DEBIAN-CVE-2025-38274, GHSA-7p7v-h84h-xmw3, ROOT-OS-UBUNTU-2404-CVE-2025-38274, UBUNTU-CVE-2025-38274.