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CVE-2025-40253
s390/ctcm: Fix double-kfree
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.

INFO

Published Date :

Dec. 4, 2025, 4:16 p.m.

Last Modified :

Dec. 6, 2025, 10:15 p.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products

The following products are affected by CVE-2025-40253 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Solution
Fix double kfree in Linux kernel s390/ctcm module.
  • Remove kfree call in mpc_rcvd_sweep_req.
  • Update the Linux kernel.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-40253.

URL Resource
https://git.kernel.org/stable/c/06f1dd1de0d33dbfbd2e1fc9fc57d8895f730de2
https://git.kernel.org/stable/c/3b177b2ded563df16f6d5920671ffcfe5915d472
https://git.kernel.org/stable/c/43096dab8cc60fc39133205fd149a54d3acebea8
https://git.kernel.org/stable/c/6bf8ccaabce8cebb6cb1f255c93d0acdfe95c17a
https://git.kernel.org/stable/c/7616e2eee679746d526c7f5befd4eedb995935b5
https://git.kernel.org/stable/c/7ff76f8dc6b550f8d16487bf3cebc278be720b5c
https://git.kernel.org/stable/c/b9dbfb1b5699f9f1e4991f96741bdf9047147589
https://git.kernel.org/stable/c/da02a1824884d6c84c5e5b5ac373b0c9e3288ec2
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-40253 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-40253 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-40253 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-40253 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Dec. 06, 2025

    Action Type Old Value New Value
    Added Reference https://git.kernel.org/stable/c/43096dab8cc60fc39133205fd149a54d3acebea8
    Added Reference https://git.kernel.org/stable/c/6bf8ccaabce8cebb6cb1f255c93d0acdfe95c17a
    Added Reference https://git.kernel.org/stable/c/7616e2eee679746d526c7f5befd4eedb995935b5
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Dec. 04, 2025

    Action Type Old Value New Value
    Added 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.
    Added Reference https://git.kernel.org/stable/c/06f1dd1de0d33dbfbd2e1fc9fc57d8895f730de2
    Added Reference https://git.kernel.org/stable/c/3b177b2ded563df16f6d5920671ffcfe5915d472
    Added Reference https://git.kernel.org/stable/c/7ff76f8dc6b550f8d16487bf3cebc278be720b5c
    Added Reference https://git.kernel.org/stable/c/b9dbfb1b5699f9f1e4991f96741bdf9047147589
    Added Reference https://git.kernel.org/stable/c/da02a1824884d6c84c5e5b5ac373b0c9e3288ec2
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
No CVSS metrics available for this vulnerability.