{"id":"CVE-2026-43378","summary":"smb: server: fix use-after-free in smb2_open()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: server: fix use-after-free in smb2_open()\n\nThe opinfo pointer obtained via rcu_dereference(fp-\u003ef_opinfo) is\ndereferenced after rcu_read_unlock(), creating a use-after-free\nwindow.","modified":"2026-06-18T03:55:31.054036427Z","published":"2026-05-08T14:21:27.319Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43378.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/190e5f808e8058640b408ccfed25440b441a718a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1e689a56173827669a35da7cb2a3c78ed5c53680"},{"type":"WEB","url":"https://git.kernel.org/stable/c/54b48ae83de8bb06e65079d96368efe359d4909c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8f5b1a7cb009a93c48e9e334a2f59a660f9afc07"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b720c84087cb547f23ce03eab93568c1769e4556"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e1b21e6066615e7d3d3a7aa2677e415e563fd7cc"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43378.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43378"},{"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":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9"},{"fixed":"e1b21e6066615e7d3d3a7aa2677e415e563fd7cc"},{"fixed":"b720c84087cb547f23ce03eab93568c1769e4556"},{"fixed":"54b48ae83de8bb06e65079d96368efe359d4909c"},{"fixed":"8f5b1a7cb009a93c48e9e334a2f59a660f9afc07"},{"fixed":"190e5f808e8058640b408ccfed25440b441a718a"},{"fixed":"1e689a56173827669a35da7cb2a3c78ed5c53680"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43378.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.15.0"},{"fixed":"6.1.167"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.130"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.78"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.19"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.9"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43378.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}