CVE-2026-68097

In the Linux kernel ksmbd code path, the ACE size check in set_ntacl_dacl() does not verify that the declared ACE size can contain all sub-authorities described by sid.num_subauth. An undersized ACE can be copied, allowing a subsequent POSIX ACL deduplication walk to read data beyond the copied A...

CVE-2026-53390 ksmbd: fix out-of-bounds read in smb_check_perm_dacl()

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix out-of-bounds read in smbcheckpermdacl The permission-check ACE walk in smbcheckpermdacl validates the ACE header size and caps sid.numsubauth at SIDMAXSUBAUTHORITIES, but it never checks that ace-size is actually larg...

Linux kernel smb_check_perm_dacl function out-of-bounds read vulnerability

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. The Linux kernel suffers from an out-of-bounds read vulnerability. The vulnerability stems from insufficient ACE size validation in the smbcheckpermdacl function of ksmbd, whic...