CVE-2025-40168
smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match().
Description
In the Linux kernel, the following vulnerability has been resolved: smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match(). smc_clc_prfx_match() is called from smc_listen_work() and not under RCU nor RTNL. Using sk_dst_get(sk)->dev could trigger UAF. Let's use __sk_dst_get() and dst_dev_rcu(). Note that the returned value of smc_clc_prfx_match() is not used in the caller.
INFO
Published Date :
Nov. 12, 2025, 11:15 a.m.
Last Modified :
Sept. 2, 2026, 1:16 p.m.
Remotely Exploit :
Yes !
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Update the Linux kernel.
- Apply the relevant security patch.
- Reboot the system if necessary.
- Verify the patch installation.
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-2025-40168.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-40168 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-2025-40168
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-2025-40168 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-40168 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.
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CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 02, 2026
Action Type Old Value New Value Added Affected Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2025/40xxx/CVE-2025-40168.json">CVE-2025-40168</a> Added Reference https://git.kernel.org/stable/c/235f81045c008169cc4e1955b4a64e118eebe61b Added Reference https://git.kernel.org/stable/c/326e5cf301d0bec0a672aa834d8254c4f9df6255 Added Reference https://git.kernel.org/stable/c/3f119c37aa293af41400cccb3d89fab8dcf774b0 Added Reference https://git.kernel.org/stable/c/4f5f52a5842937f945582a93cb9daed9ea526fee Added Reference https://git.kernel.org/stable/c/d26e80f7fb62d77757b67a1b94e4ac756bc9c658 Removed Reference https://git.kernel.org/stable/c/235f81045c008169cc4e1955b4a64e118eebe61b Removed Reference https://git.kernel.org/stable/c/d26e80f7fb62d77757b67a1b94e4ac756bc9c658 -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 30, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'a046d57da19f812216f393e7c535f5858f793ac3', 'lessThan': 'd26e80f7fb62d77757b67a1b94e4ac756bc9c658', 'versionType': 'git'}, {'status': 'affected', 'version': 'a046d57da19f812216f393e7c535f5858f793ac3', 'lessThan': '235f81045c008169cc4e1955b4a64e118eebe61b', 'versionType': 'git'}], 'programFiles': ['net/smc/smc_clc.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.11'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.11', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.17.3', 'versionType': 'semver', 'lessThanOrEqual': '6.17.*'}, {'status': 'unaffected', 'version': '6.18', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/smc/smc_clc.c'], 'defaultStatus': 'affected'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2025-40168', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-06-16T19:59:59.004592Z'} -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Nov. 12, 2025
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match(). smc_clc_prfx_match() is called from smc_listen_work() and not under RCU nor RTNL. Using sk_dst_get(sk)->dev could trigger UAF. Let's use __sk_dst_get() and dst_dev_rcu(). Note that the returned value of smc_clc_prfx_match() is not used in the caller. Added Reference https://git.kernel.org/stable/c/235f81045c008169cc4e1955b4a64e118eebe61b Added Reference https://git.kernel.org/stable/c/d26e80f7fb62d77757b67a1b94e4ac756bc9c658