CVE-2025-38583: clk: xilinx: vcu: unregister pll_post only if registered correctly

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-08-19 · updated 2026-06-17
Weakness: CWE-476

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]

Affected products

Debian Linux: 11.0
Linux kernel: from 5.12 before 5.15.190; from 5.16 before 6.1.148; from 6.2 before 6.6.102; from 6.7 before 6.12.42; from 6.13 before 6.15.10; from 6.16 before 6.16.1 — fixed in 5.15.190, 6.1.148, 6.12.42, 6.15.10, 6.16.1, 6.6.102

How to fix

Upgrade to a fixed version: Linux kernel 5.15.190, 6.1.148, 6.12.42, 6.15.10. Check the vendor advisory for mitigations.

References

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