{"id":"CVE-2026-64385","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix double-free in SMB2_ioctl() replay\n\nA response-bearing attempt can return a replayable error and free its\nresponse buffer","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix double-free in SMB2_ioctl() replay\n\nA response-bearing attempt can return a replayable error and free its\nresponse buffer. If SMB2_ioctl_init() fails b…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","published":"2026-07-25","updated":"2026-07-27","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-64385","references":[{"url":"https://git.kernel.org/stable/c/0be4bc64882edaefaaee8d1e27d083643eb778e6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/276c8efbc49f9303ac76d0d4deab7128581b0f3b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/96fcfc8ae7359346156e492ca610e830d2649ad6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f9bbadb6c94583e3b4af1afc449bfceb1d1ddec9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fc65ffb4ef1bf540da16b17c225ae51091e07d72","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64385.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-64385"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2507035"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64385"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64385"},{"url":"https://lore.kernel.org/linux-cve-announce/2026072526-CVE-2026-64385-80b2@gregkh/T"}],"tags":["nvd","csaf","vex","red-hat","score-dispute"],"epss":0.00457,"epssPercentile":0.38848,"ingestedAt":"2026-07-27T07:17:00.939Z","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 9"],"cwe":["CWE-1341"],"scores":{"nvd":9.8,"vendor":7},"slug":"CVE-2026-64385","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix double-free in SMB2_ioctl() replay\n\nA response-bearing attempt can return a replayable error and free its\nresponse buffer. If SMB2_ioctl_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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64385.json)","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}