CVE-2026-63909 ksmbd: OOB read regression in smb_check_perm_dacl() ACE-walk loops

In the Linux kernel, the following vulnerability has been resolved: ksmbd: OOB read regression in smbcheckpermdacl ACE-walk loops Commit d07b26f39246 "ksmbd: require minimum ACE size in smbcheckpermdacl" introduced a transposed bounds check: if offsetofstruct smbace, sid + acessize size offset 2...

CVE-2026-63909

CVE-2026-63909 – Linux kernel ksmbd OOB read regression . The issue stems from a transposed bounds check in smb_check_perm_dacl() that, after a patch, allowed reading beyond allocated memory during SMB2_CREATE operations. The correct guard requires at least 16 bytes (8-byte offset + 8-byte SID ba...

EUVD-2026-45682

In the Linux kernel, the following vulnerability has been resolved: ksmbd: OOB read regression in smbcheckpermdacl ACE-walk loops Commit d07b26f39246 "ksmbd: require minimum ACE size in smbcheckpermdacl" introduced a transposed bounds check: if offsetofstruct smbace, sid + acessize size offset 2...

PT-2026-61226

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An out-of-bounds read exists in the smb check perm dacl function within the ksmbd module. This issue occurs during ACE-walk loops when a transposed bounds check fails to properly validat...