{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64382", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.784Z", "datePublished": "2026-07-25T08:50:31.937Z", "dateUpdated": "2026-07-27T05:00:10.074Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-27T05:00:10.074Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix double-free in SMB2_open() replay\n\nA response-bearing attempt can return a replayable error and free its\nresponse buffer. If SMB2_open_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."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH"}}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/client/smb2pdu.c"], "versions": [{"version": "433042a91f9373241307725b52de573933ffedbf", "lessThan": "02bc2896bdc3e29362d6e40d404006944a159c25", "status": "affected", "versionType": "git"}, {"version": "4f1fffa2376922f3d1d506e49c0fd445b023a28e", "lessThan": "3196b5192f246df4272072f61a2f4a3e9967f55d", "status": "affected", "versionType": "git"}, {"version": "4f1fffa2376922f3d1d506e49c0fd445b023a28e", "lessThan": "14498ff5ce0f272ce0ef988721413e06b7038972", "status": "affected", "versionType": "git"}, {"version": "4f1fffa2376922f3d1d506e49c0fd445b023a28e", "lessThan": "ff2d30927bc3bf3c629f0768d2068096e64ef5ce", "status": "affected", "versionType": "git"}, {"version": "4f1fffa2376922f3d1d506e49c0fd445b023a28e", "lessThan": "b55e182f2324bc6a604c21a47aa6c448f719a532", "status": "affected", "versionType": "git"}, {"version": "6.6.32", "lessThan": "6.6.145", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/client/smb2pdu.c"], "versions": [{"version": "6.8", "status": "affected"}, {"version": "0", "lessThan": "6.8", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.96", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.39", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.4", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.32", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.12.96"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.18.39"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "7.1.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "7.2-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/02bc2896bdc3e29362d6e40d404006944a159c25"}, {"url": "https://git.kernel.org/stable/c/3196b5192f246df4272072f61a2f4a3e9967f55d"}, {"url": "https://git.kernel.org/stable/c/14498ff5ce0f272ce0ef988721413e06b7038972"}, {"url": "https://git.kernel.org/stable/c/ff2d30927bc3bf3c629f0768d2068096e64ef5ce"}, {"url": "https://git.kernel.org/stable/c/b55e182f2324bc6a604c21a47aa6c448f719a532"}], "title": "smb: client: fix double-free in SMB2_open() replay", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{}

{"bugzilla": {"description": "kernel: smb: client: fix double-free in SMB2_open() replay", "id": "2507042", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507042"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-1341", "details": ["A flaw was found in the Linux kernel's Server Message Block (SMB) client. A double-free vulnerability exists in the `SMB2_open()` replay mechanism. This occurs when a response-bearing attempt returns a replayable error and frees its response buffer, and then the cleanup process attempts to free the same buffer again. This memory corruption vulnerability could potentially lead to a denial of service or, in some cases, arbitrary code execution."], "name": "CVE-2026-64382", "public_date": "2026-07-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64382\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64382\nhttps://lore.kernel.org/linux-cve-announce/2026072525-CVE-2026-64382-5957@gregkh/T"], "threat_severity": "Important"}