{"api_version":"1","generated_at":"2026-08-06T14:12:50+00:00","cve":"CVE-2026-64597","urls":{"html":"https://cve.report/CVE-2026-64597","api":"https://cve.report/api/cve/CVE-2026-64597.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64597","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64597"},"summary":{"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":"PUBLISHED","assigner":"Linux","published_at":"2026-08-06 08:16:35","updated_at":"2026-08-06 08:16:35"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/f96e1cdcb63ed3321142ff2fcdf784e32cda8fee","name":"https://git.kernel.org/stable/c/f96e1cdcb63ed3321142ff2fcdf784e32cda8fee","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d15d83125007f673aec4323e1bbbaaffbe87ea13","name":"https://git.kernel.org/stable/c/d15d83125007f673aec4323e1bbbaaffbe87ea13","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/037511726228aaf165c7067ff2bfc88eaecdf1f3","name":"https://git.kernel.org/stable/c/037511726228aaf165c7067ff2bfc88eaecdf1f3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b18ed621dbfceecea5539848cddcb9272c9a61e1","name":"https://git.kernel.org/stable/c/b18ed621dbfceecea5539848cddcb9272c9a61e1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0aa97edf7c347c0f54e7e60c4740574b8120c66a","name":"https://git.kernel.org/stable/c/0aa97edf7c347c0f54e7e60c4740574b8120c66a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64597","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64597","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 433042a91f9373241307725b52de573933ffedbf 037511726228aaf165c7067ff2bfc88eaecdf1f3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4f1fffa2376922f3d1d506e49c0fd445b023a28e 0aa97edf7c347c0f54e7e60c4740574b8120c66a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4f1fffa2376922f3d1d506e49c0fd445b023a28e d15d83125007f673aec4323e1bbbaaffbe87ea13 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4f1fffa2376922f3d1d506e49c0fd445b023a28e b18ed621dbfceecea5539848cddcb9272c9a61e1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4f1fffa2376922f3d1d506e49c0fd445b023a28e f96e1cdcb63ed3321142ff2fcdf784e32cda8fee git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.6.32 6.6.145 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.8","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.8 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.145 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.96 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.39 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.4 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/smb/client/smb2pdu.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"037511726228aaf165c7067ff2bfc88eaecdf1f3","status":"affected","version":"433042a91f9373241307725b52de573933ffedbf","versionType":"git"},{"lessThan":"0aa97edf7c347c0f54e7e60c4740574b8120c66a","status":"affected","version":"4f1fffa2376922f3d1d506e49c0fd445b023a28e","versionType":"git"},{"lessThan":"d15d83125007f673aec4323e1bbbaaffbe87ea13","status":"affected","version":"4f1fffa2376922f3d1d506e49c0fd445b023a28e","versionType":"git"},{"lessThan":"b18ed621dbfceecea5539848cddcb9272c9a61e1","status":"affected","version":"4f1fffa2376922f3d1d506e49c0fd445b023a28e","versionType":"git"},{"lessThan":"f96e1cdcb63ed3321142ff2fcdf784e32cda8fee","status":"affected","version":"4f1fffa2376922f3d1d506e49c0fd445b023a28e","versionType":"git"},{"lessThan":"6.6.145","status":"affected","version":"6.6.32","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/smb/client/smb2pdu.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.8"},{"lessThan":"6.8","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.96","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.39","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.145","versionStartIncluding":"6.6.32","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.96","versionStartIncluding":"6.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.39","versionStartIncluding":"6.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.4","versionStartIncluding":"6.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc1","versionStartIncluding":"6.8","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-08-06T07:13:52.117Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/037511726228aaf165c7067ff2bfc88eaecdf1f3"},{"url":"https://git.kernel.org/stable/c/0aa97edf7c347c0f54e7e60c4740574b8120c66a"},{"url":"https://git.kernel.org/stable/c/d15d83125007f673aec4323e1bbbaaffbe87ea13"},{"url":"https://git.kernel.org/stable/c/b18ed621dbfceecea5539848cddcb9272c9a61e1"},{"url":"https://git.kernel.org/stable/c/f96e1cdcb63ed3321142ff2fcdf784e32cda8fee"}],"title":"smb: client: fix double-free in SMB2_close() replay","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64597","datePublished":"2026-08-06T07:13:52.117Z","dateReserved":"2026-07-19T15:36:31.799Z","dateUpdated":"2026-08-06T07:13:52.117Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-06 08:16:35","lastModifiedDate":"2026-08-06 08:16:35","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64597","Ordinal":"1","Title":"smb: client: fix double-free in SMB2_close() replay","CVE":"CVE-2026-64597","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64597","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"smb: client: fix double-free in SMB2_close() replay"}]}}}