CVE-2025-40168

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.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/235f81045c008169cc4e1955b4a64e118eebe61b
https://git.kernel.org/stable/c/326e5cf301d0bec0a672aa834d8254c4f9df6255
https://git.kernel.org/stable/c/3f119c37aa293af41400cccb3d89fab8dcf774b0
https://git.kernel.org/stable/c/4f5f52a5842937f945582a93cb9daed9ea526fee
https://git.kernel.org/stable/c/d26e80f7fb62d77757b67a1b94e4ac756bc9c658

Configurations

No configuration.

History

No history.

Information

Published : 2025-11-12 11:15

Updated : 2026-09-02 13:16

NVD link : CVE-2025-40168

Mitre link : CVE-2025-40168

CVE.ORG link : CVE-2025-40168

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2025-40168", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"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"}}], "cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.2}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "a046d57da19f812216f393e7c535f5858f793ac3", "lessThan": "3f119c37aa293af41400cccb3d89fab8dcf774b0", "versionType": "git"}, {"status": "affected", "version": "a046d57da19f812216f393e7c535f5858f793ac3", "lessThan": "4f5f52a5842937f945582a93cb9daed9ea526fee", "versionType": "git"}, {"status": "affected", "version": "a046d57da19f812216f393e7c535f5858f793ac3", "lessThan": "326e5cf301d0bec0a672aa834d8254c4f9df6255", "versionType": "git"}, {"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": "6.1.187", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.156", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.108", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"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"}]}], "published": "2025-11-12T11:15:47.150", "references": [{"url": "https://git.kernel.org/stable/c/235f81045c008169cc4e1955b4a64e118eebe61b", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/326e5cf301d0bec0a672aa834d8254c4f9df6255", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/3f119c37aa293af41400cccb3d89fab8dcf774b0", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/4f5f52a5842937f945582a93cb9daed9ea526fee", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/d26e80f7fb62d77757b67a1b94e4ac756bc9c658", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Deferred", "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match().\n\nsmc_clc_prfx_match() is called from smc_listen_work() and\nnot under RCU nor RTNL.\n\nUsing sk_dst_get(sk)->dev could trigger UAF.\n\nLet's use __sk_dst_get() and dst_dev_rcu().\n\nNote that the returned value of smc_clc_prfx_match() is not\nused in the caller."}], "lastModified": "2026-09-02T13:16:50.500", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}