{"id":"CVE-2026-64381","summary":"smb: client: Fix next buffer leak in receive_encrypted_standard()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: Fix next buffer leak in receive_encrypted_standard()\n\nreceive_encrypted_standard() allocates next_buffer before checking\nwhether the number of compound PDUs already reached MAX_COMPOUND. If\nthe limit check fails, the function returns immediately and the newly\nallocated next_buffer is not assigned to server-\u003esmallbuf/server-\u003ebigbuf,\nmaking it leaked.\n\nMove the MAX_COMPOUND check before allocating next_buffer.","modified":"2026-07-27T04:03:19.868198917Z","published":"2026-07-25T08:50:31.209Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64381.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/07e0ab81df1790afa35732a4e8e07ff831b29008"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1c6267a1d5cf4c73b656f8181b310cbbb3e4767b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/297243e365fc9fe2f8e9b7dd535a65d922cd108b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/67097772df7791c53d608f04bd31c676ccf79b83"},{"type":"WEB","url":"https://git.kernel.org/stable/c/68fc0b6cc03ca58060c0f36454e169f5fe258974"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9136a08dc29328edd9867f2545e73906ac9df93b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/927d4805aea0a287d36dd4f826ee24d69a2afee3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/94e4f672db029414b9888b5137a7559f1febf2d8"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64381.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64381"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"b24df3e30cbf48255db866720fb71f14bf9d2f39"},{"fixed":"94e4f672db029414b9888b5137a7559f1febf2d8"},{"fixed":"68fc0b6cc03ca58060c0f36454e169f5fe258974"},{"fixed":"07e0ab81df1790afa35732a4e8e07ff831b29008"},{"fixed":"9136a08dc29328edd9867f2545e73906ac9df93b"},{"fixed":"67097772df7791c53d608f04bd31c676ccf79b83"},{"fixed":"297243e365fc9fe2f8e9b7dd535a65d922cd108b"},{"fixed":"927d4805aea0a287d36dd4f826ee24d69a2afee3"},{"fixed":"1c6267a1d5cf4c73b656f8181b310cbbb3e4767b"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64381.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.19.0"},{"fixed":"5.10.261"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.212"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.178"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.145"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.96"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.39"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64381.json"}}],"schema_version":"1.7.5"}