CVE-2025-40057
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-10-28

Last updated on: 2025-10-30

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: ptp: Add a upper bound on max_vclocks syzbot reported WARNING in max_vclocks_store. This occurs when the argument max is too large for kcalloc to handle. Extend the guard to guard against values that are too large for kcalloc
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Meta Information
Published
2025-10-28
Last Modified
2025-10-30
Generated
2026-05-07
AI Q&A
2025-10-28
EPSS Evaluated
2026-05-05
NVD
CVE-2025-40057
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
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 in the Linux kernel relates to the ptp (Precision Time Protocol) subsystem where there was no upper bound on the max_vclocks parameter. When a very large value is passed to max_vclocks, it causes an issue with kcalloc, a kernel memory allocation function, which cannot handle such large allocations properly. The fix adds an upper bound to prevent values that are too large for kcalloc, avoiding potential problems.


How can this vulnerability impact me? :

If exploited or triggered, this vulnerability could cause the kernel to attempt to allocate an excessively large amount of memory, potentially leading to system instability, crashes, or denial of service conditions.


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