CVE-2025-38583 clk: xilinx: vcu: unregister pll_post only if registered correctly
A null pointer dereference in the Xilinx VCU clock driver causes a kernel crash when clock registration fails, leading to 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-2025-38583?
CVE-2025-38583 is a medium-severity vulnerability in Debian Debian Linux, published on 19 Aug 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:
clk: xilinx: vcu: unregister pll_post only if registered correctly
If registration of pll_post is failed, it will be set to NULL or ERR, unregistering same will fail with following call trace:
Unable to handle kernel NULL pointer dereference at virtual address 008 pc : clk_hw_unregister+0xc/0x20 lr : clk_hw_unregister_fixed_factor+0x18/0x30 sp : ffff800011923850 ... Call trace: clk_hw_unregister+0xc/0x20 clk_hw_unregister_fixed_factor+0x18/0x30 xvcu_unregister_clock_provider+0xcc/0xf4 [xlnx_vcu] xvcu_probe+0x2bc/0x53c [xlnx_vcu]
Weakness: CWE-476
Which versions are affected by CVE-2025-38583?
It affects 2 products.
Products include Debian Debian Linux, Linux kernel.
How do I fix CVE-2025-38583?
Apply the vendor's patch.
Is CVE-2025-38583 being exploited?
There is no known exploitation of CVE-2025-38583 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as AZL-66530, AZL-73875, BELL-CVE-2025-38583, DEBIAN-CVE-2025-38583, GHSA-p83v-m67p-pffw, ROOT-OS-DEBIAN-12-CVE-2025-38583 and 4 more.