CVE-2025-39728

clk: samsung: Fix UBSAN panic in samsung_clk_init()

Description

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 ...

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.02%
Affected: Linux Linux
Affected: Linux Linux
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/stable/c/00307934eb94aaa0a99addfb37b9fe206f945004 patch
https://git.kernel.org/stable/c/d974e177369c034984cece9d7d4fada9f8b9c740 patch
https://git.kernel.org/stable/c/0fef48f4a70e45a93e73c39023c3a6ea624714d6 patch
https://git.kernel.org/stable/c/4d29a6dcb51e346595a15b49693eeb728925ca43 patch
https://git.kernel.org/stable/c/24307866e0ac0a5ddb462e766ceda5e27a6fbbe3 patch
https://git.kernel.org/stable/c/a1500b98cd81a32fdfb9bc63c33bb9f0c2a0a1bf patch
https://git.kernel.org/stable/c/157de9e48007a20c65d02fc0229a16f38134a72d patch
https://git.kernel.org/stable/c/d19d7345a7bcdb083b65568a11b11adffe0687af patch

Frequently Asked Questions

What is the severity of CVE-2025-39728?
CVE-2025-39728 has been scored as a medium severity vulnerability.
How to fix CVE-2025-39728?
To fix CVE-2025-39728, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-39728 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-39728 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-39728?
CVE-2025-39728 affects Linux Linux, Linux Linux.
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