CVE-2025-40253
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-12-04

Last updated on: 2025-12-06

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: s390/ctcm: Fix double-kfree The function 'mpc_rcvd_sweep_req(mpcginfo)' is called conditionally from function 'ctcmpc_unpack_skb'. It frees passed mpcginfo. After that a call to function 'kfree' in function 'ctcmpc_unpack_skb' frees it again. Remove 'kfree' call in function 'mpc_rcvd_sweep_req(mpcginfo)'. Bug detected by the clang static analyzer.
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Meta Information
Published
2025-12-04
Last Modified
2025-12-06
Generated
2026-06-16
AI Q&A
2025-12-04
EPSS Evaluated
2026-06-15
NVD
CVE-2025-40253
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability is a double-free bug in the Linux kernel's s390/ctcm component. Specifically, the function 'mpc_rcvd_sweep_req(mpcginfo)' frees a memory object 'mpcginfo', and then the function 'ctcmpc_unpack_skb' also calls 'kfree' on the same object, causing it to be freed twice. This can lead to undefined behavior or potential security issues. The fix involved removing the redundant 'kfree' call in 'mpc_rcvd_sweep_req'.

Impact Analysis

A double-free vulnerability can lead to memory corruption, which attackers might exploit to cause system crashes, execute arbitrary code, or escalate privileges. In this case, since it is in the Linux kernel, exploitation could compromise system stability or security.

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