{"id":"CVE-2026-74608","revision":"b656fdbdcdfd4a1f9b128d51aaa21771","records":[{"revision":"b656fdbdcdfd4a1f9b128d51aaa21771","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-74608","aliases":[],"title":"smb: client: Fix use-after-free in cifs_try_adding_channels()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: Fix use-after-free in cifs_try_adding_channels()\n\ncifs_try_adding_channels() takes a temporary reference to an interface\nbefore dropping iface_lock. If cifs_ses_add_channel() fails, it drops\nthat reference and then increments iface->weight_fulfilled.\n\nA concurrent interface list refresh can remove the list reference while\nchannel creation is in progress. In that case, the failure-path\nkref_put() releases the last reference and frees iface. Updating\nweight_fulfilled afterward then accesses freed memory.\n\nIncrement weight_fulfilled before dropping the temporary reference,\nkeeping iface alive for the final access.","state":0,"publishedAt":"2026-08-22T15:31:55.298+00:00","modifiedAt":"2026-10-16T19:06:00.915+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                        \"fs/smb/client/sess.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"cbc53148cc0946b72d62a3c53870cb22ce4ec284\",\n                            \"lessThan\": \"64d7584e62ac8cdc750455c5fdc6008fc2de4f06\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cff97d683a083b862a8bb24309e0f4d2d928128a\",\n                            \"lessThan\": \"c292d4686f717c03e5022fc4ae7c782f39a94915\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6aac002bcfd554aff6d3ebb55e1660d078d70ab0\",\n                            \"lessThan\": \"47dfac48bce7198ad4f1a388fc8c9491f878ac3b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6aac002bcfd554aff6d3ebb55e1660d078d70ab0\",\n                            \"lessThan\": \"1ffacbadc14530e55b8d86f7b917524f6a0fb891\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6aac002bcfd554aff6d3ebb55e1660d078d70ab0\",\n                            \"lessThan\": \"1305eadc6a7d78a8d0a52eee29ddd2d9e8a27805\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6aac002bcfd554aff6d3ebb55e1660d078d70ab0\",\n                            \"lessThan\": \"4986410316b1ae0e63c6ce418e4eb196723626e7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"22a6c5b3425f327e7f4c3606a72277dce82c7d83\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6.1.78\",\n                            \"lessThan\": \"6.1.183\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.17\",\n                            \"lessThan\": \"6.6.152\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.7.5\",\n                            \"lessThan\": \"6.8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\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                        \"fs/smb/client/sess.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.8\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.8\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.183\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.152\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.104\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.45\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.9\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8,"severity":"CRITICAL"}],"references":["https://git.kernel.org/stable/c/64d7584e62ac8cdc750455c5fdc6008fc2de4f06","https://git.kernel.org/stable/c/c292d4686f717c03e5022fc4ae7c782f39a94915","https://git.kernel.org/stable/c/47dfac48bce7198ad4f1a388fc8c9491f878ac3b","https://git.kernel.org/stable/c/1ffacbadc14530e55b8d86f7b917524f6a0fb891","https://git.kernel.org/stable/c/1305eadc6a7d78a8d0a52eee29ddd2d9e8a27805","https://git.kernel.org/stable/c/4986410316b1ae0e63c6ce418e4eb196723626e7"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74608","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-74608","identifiers":["CVE-2026-74608"]},"retained":false,"historicalAffected":[]}],"coverage":[]}