CVE-2025-39728: clk: samsung: Fix UBSAN panic in samsung_clk_init()
First published: Fri Apr 18 2025(Updated: )
In the Linux kernel, the following vulnerability has been resolved: clk: samsung: Fix UBSAN panic in samsung_clk_init() With UBSAN_ARRAY_BOUNDS=y, I'm hitting the below panic due to dereferencing `ctx->clk_data.hws` before setting `ctx->clk_data.num = nr_clks`. Move that up to fix the crash. UBSAN: array index out of bounds: 00000000f2005512 [#1] PREEMPT SMP <snip> Call trace: samsung_clk_init+0x110/0x124 (P) samsung_clk_init+0x48/0x124 (L) samsung_cmu_register_one+0x3c/0xa0 exynos_arm64_register_cmu+0x54/0x64 __gs101_cmu_top_of_clk_init_declare+0x28/0x60 ...
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel |
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Reference Links
- https://git.kernel.org/stable/c/00307934eb94aaa0a99addfb37b9fe206f945004
- https://git.kernel.org/stable/c/d974e177369c034984cece9d7d4fada9f8b9c740
- https://git.kernel.org/stable/c/0fef48f4a70e45a93e73c39023c3a6ea624714d6
- https://git.kernel.org/stable/c/4d29a6dcb51e346595a15b49693eeb728925ca43
- https://git.kernel.org/stable/c/24307866e0ac0a5ddb462e766ceda5e27a6fbbe3
- https://git.kernel.org/stable/c/a1500b98cd81a32fdfb9bc63c33bb9f0c2a0a1bf
- https://git.kernel.org/stable/c/157de9e48007a20c65d02fc0229a16f38134a72d
- https://git.kernel.org/stable/c/d19d7345a7bcdb083b65568a11b11adffe0687af
Frequently Asked Questions
What is the severity of CVE-2025-39728?
CVE-2025-39728 has been classified as a medium severity vulnerability due to its potential impact on system stability.
How do I fix CVE-2025-39728?
To fix CVE-2025-39728, ensure you apply the latest patches from your Linux distribution that address this vulnerability.
What is the impact of CVE-2025-39728?
The impact of CVE-2025-39728 is primarily related to system panic, which could lead to unexpected shutdowns or crashes in the Linux kernel.
Which versions of the Linux kernel are affected by CVE-2025-39728?
CVE-2025-39728 affects specific versions of the Linux kernel that utilize the samsung_clk_init function with incorrect context handling.
Is CVE-2025-39728 actively exploited in the wild?
As of now, there is no evidence to suggest that CVE-2025-39728 is being actively exploited in real-world attacks.
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