CVE-2025-39935
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-10-04

Last updated on: 2026-03-25

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: ASoC: codec: sma1307: Fix memory corruption in sma1307_setting_loaded() The sma1307->set.header_size is how many integers are in the header (there are 8 of them) but instead of allocating space of 8 integers we allocate 8 bytes. This leads to memory corruption when we copy data it on the next line: memcpy(sma1307->set.header, data, sma1307->set.header_size * sizeof(int)); Also since we're immediately copying over the memory in ->set.header, there is no need to zero it in the allocator. Use devm_kmalloc_array() to allocate the memory instead.
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Meta Information
Published
2025-10-04
Last Modified
2026-03-25
Generated
2026-05-07
AI Q&A
2025-10-04
EPSS Evaluated
2026-05-05
NVD
CVE-2025-39935
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel From 5.15.160 (inc) to 5.16 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability is a memory corruption issue in the Linux kernel's ASoC codec sma1307 driver. The problem occurs because the code allocates only 8 bytes for a header that actually requires space for 8 integers (which is larger than 8 bytes). When the program copies data into this insufficiently allocated space, it causes memory corruption. The fix involves correctly allocating memory for 8 integers using devm_kmalloc_array() and removing unnecessary zeroing of the memory.


How can this vulnerability impact me? :

This vulnerability can lead to memory corruption in the Linux kernel, which may cause system instability, crashes, or potentially allow an attacker to execute arbitrary code or escalate privileges if exploited.


What immediate steps should I take to mitigate this vulnerability?

Update the Linux kernel to a version that includes the fix for the sma1307 codec memory corruption issue in sma1307_setting_loaded(). This fix involves correct memory allocation using devm_kmalloc_array() instead of allocating insufficient memory, preventing memory corruption. Until the update is applied, avoid using the affected sma1307 codec if possible.


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