{"id":"CVE-2026-64597","revision":"a1f326e0ba2f4309b03c70c8ac540f7e","records":[{"revision":"a1f326e0ba2f4309b03c70c8ac540f7e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-64597","aliases":[],"title":"smb: client: fix double-free in SMB2_close() replay","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix double-free in SMB2_close() replay\n\nA response-bearing attempt can return a replayable error and free its\nresponse buffer. If SMB2_close_init() fails before the next send, cleanup\nretains the previous buffer type and frees that response again.\n\nReset response bookkeeping before each attempt to prevent the stale free.","state":0,"publishedAt":"2026-08-06T07:13:52.117+00:00","modifiedAt":"2026-10-19T20:48:43.468+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/smb2pdu.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"433042a91f9373241307725b52de573933ffedbf\",\n                            \"lessThan\": \"037511726228aaf165c7067ff2bfc88eaecdf1f3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4f1fffa2376922f3d1d506e49c0fd445b023a28e\",\n                            \"lessThan\": \"0aa97edf7c347c0f54e7e60c4740574b8120c66a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4f1fffa2376922f3d1d506e49c0fd445b023a28e\",\n                            \"lessThan\": \"d15d83125007f673aec4323e1bbbaaffbe87ea13\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4f1fffa2376922f3d1d506e49c0fd445b023a28e\",\n                            \"lessThan\": \"b18ed621dbfceecea5539848cddcb9272c9a61e1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4f1fffa2376922f3d1d506e49c0fd445b023a28e\",\n                            \"lessThan\": \"f96e1cdcb63ed3321142ff2fcdf784e32cda8fee\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6.6.32\",\n                            \"lessThan\": \"6.6.145\",\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/smb2pdu.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\": \"6.6.145\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.96\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.39\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.4\",\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/037511726228aaf165c7067ff2bfc88eaecdf1f3","https://git.kernel.org/stable/c/0aa97edf7c347c0f54e7e60c4740574b8120c66a","https://git.kernel.org/stable/c/d15d83125007f673aec4323e1bbbaaffbe87ea13","https://git.kernel.org/stable/c/b18ed621dbfceecea5539848cddcb9272c9a61e1","https://git.kernel.org/stable/c/f96e1cdcb63ed3321142ff2fcdf784e32cda8fee"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-64597","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-64597","identifiers":["CVE-2026-64597"]},"retained":false,"historicalAffected":[]}],"coverage":[]}