{"id":"CVE-2026-31609","revision":"0d8e4c29ff63426cb7184f706f6c16f5","records":[{"revision":"0d8e4c29ff63426cb7184f706f6c16f5","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-31609","aliases":[],"title":"smb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush()\n\nsmbd_send_batch_flush() already calls smbd_free_send_io(),\nso we should not call it again after smbd_post_send()\nmoved it to the batch list.","state":0,"publishedAt":"2026-04-24T14:42:30.797+00:00","modifiedAt":"2026-10-19T18:56:00.237+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/smbdirect.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"cca0526ef2344cab6944d7f441fc24e152da031b\",\n                            \"lessThan\": \"a9940dcbe5cb92482c04efc7341039ddf7dbf607\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"37b5c06956183b65e6808b509cf637632016cdf7\",\n                            \"lessThan\": \"22b7c1c619d808aec4cad3dc42103345e370d107\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"21538121efe6c8c5b51c742fa02cbe820bc48714\",\n                            \"lessThan\": \"f9a162c2bbcd0ac85bd07c5b37cf20286048b65c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"21538121efe6c8c5b51c742fa02cbe820bc48714\",\n                            \"lessThan\": \"27b7c3e916218b5eb2ee350211140e961bfc49be\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6.18.11\",\n                            \"lessThan\": \"6.18.24\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19.1\",\n                            \"lessThan\": \"6.19.14\",\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/smbdirect.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"7.0\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"7.0\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.24\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19.14\",\n                            \"lessThanOrEqual\": \"6.19.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0.1\",\n                            \"lessThanOrEqual\": \"7.0.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1\",\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/a9940dcbe5cb92482c04efc7341039ddf7dbf607","https://git.kernel.org/stable/c/22b7c1c619d808aec4cad3dc42103345e370d107","https://git.kernel.org/stable/c/f9a162c2bbcd0ac85bd07c5b37cf20286048b65c","https://git.kernel.org/stable/c/27b7c3e916218b5eb2ee350211140e961bfc49be"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-31609","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-31609","identifiers":["CVE-2026-31609"]},"retained":false,"historicalAffected":[]}],"coverage":[]}