{"id":"CVE-2025-40139","revision":"37a31b2a15b74920919acfec81761d73","records":[{"revision":"37a31b2a15b74920919acfec81761d73","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-40139","aliases":[],"title":"smc: Use __sk_dst_get() and dst_dev_rcu() in in smc_clc_prfx_set().","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmc: Use __sk_dst_get() and dst_dev_rcu() in in smc_clc_prfx_set().\n\nsmc_clc_prfx_set() is called during connect() and not under RCU\nnor RTNL.\n\nUsing sk_dst_get(sk)->dev could trigger UAF.\n\nLet's use __sk_dst_get() and dev_dst_rcu() under rcu_read_lock()\nafter kernel_getsockname().\n\nNote that the returned value of smc_clc_prfx_set() is not used\nin the caller.\n\nWhile at it, we change the 1st arg of smc_clc_prfx_set[46]_rcu()\nnot to touch dst there.","state":0,"publishedAt":"2025-11-12T10:23:24.216+00:00","modifiedAt":"2026-10-15T22:02:38.627+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/smc/smc_clc.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"a046d57da19f812216f393e7c535f5858f793ac3\",\n                            \"lessThan\": \"5a2fccc4b32c13ddde3676f9e15e1a9baa7d6fde\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a046d57da19f812216f393e7c535f5858f793ac3\",\n                            \"lessThan\": \"80d1fd39f4e37d836655e9f7ffccaf78925049bf\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a046d57da19f812216f393e7c535f5858f793ac3\",\n                            \"lessThan\": \"956c57daba55cf9ed25d9f2512883b8a1a927599\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a046d57da19f812216f393e7c535f5858f793ac3\",\n                            \"lessThan\": \"0736993bfe5c7a9c744ae3fac62d769dfdae54e1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a046d57da19f812216f393e7c535f5858f793ac3\",\n                            \"lessThan\": \"935d783e5de9b64587f3adb25641dd8385e64ddb\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/smc/smc_clc.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.11\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.11\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.187\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.156\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.108\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.17.3\",\n                            \"lessThanOrEqual\": \"6.17.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/5a2fccc4b32c13ddde3676f9e15e1a9baa7d6fde","https://git.kernel.org/stable/c/80d1fd39f4e37d836655e9f7ffccaf78925049bf","https://git.kernel.org/stable/c/956c57daba55cf9ed25d9f2512883b8a1a927599","https://git.kernel.org/stable/c/0736993bfe5c7a9c744ae3fac62d769dfdae54e1","https://git.kernel.org/stable/c/935d783e5de9b64587f3adb25641dd8385e64ddb"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-40139","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-40139","identifiers":["CVE-2025-40139"]},"retained":false,"historicalAffected":[]}],"coverage":[]}