CVE-2026-31712

In the Linux kernel, the following vulnerability has been resolved: ksmbd: require minimum ACE size in smbcheckpermdacl Both ACE-walk loops in smbcheckpermdacl only guard against an under-sized remaining buffer, not against an ACE whose declared ace-size is smaller than the struct it claims to...

CVE-2026-31704

In the Linux kernel, the following vulnerability has been resolved: ksmbd: use checkaddoverflow to prevent u16 DACL size overflow setposixaclentriesdacl and setntacldacl accumulate ACE sizes in u16 variables. When a file has many POSIX ACL entries, the accumulated size can wrap past 65535, causin...

CVE-2026-31712 ksmbd: require minimum ACE size in smb_check_perm_dacl()

In the Linux kernel, the following vulnerability has been resolved: ksmbd: require minimum ACE size in smbcheckpermdacl Both ACE-walk loops in smbcheckpermdacl only guard against an under-sized remaining buffer, not against an ACE whose declared ace-size is smaller than the struct it claims to...

CVE-2026-31712

In the Linux kernel, the following vulnerability has been resolved: ksmbd: require minimum ACE size in smbcheckpermdacl Both ACE-walk loops in smbcheckpermdacl only guard against an under-sized remaining buffer, not against an ACE whose declared ace-size is smaller than the struct it claims to...

EUVD-2026-26521

In the Linux kernel, the following vulnerability has been resolved: ksmbd: require minimum ACE size in smbcheckpermdacl Both ACE-walk loops in smbcheckpermdacl only guard against an under-sized remaining buffer, not against an ACE whose declared ace-size is smaller than the struct it claims to...

CVE-2026-31712

In the Linux kernel, the following vulnerability has been resolved: ksmbd: require minimum ACE size in smbcheckpermdacl Both ACE-walk loops in smbcheckpermdacl only guard against an under-sized remaining buffer, not against an ACE whose declared ace-size is smaller than the struct it claims to...

CVE-2026-31712

CVE-2026-31712 affects ksmbd in the Linux kernel. A crafted DACL with an undersized ACE can bypass validation in smb_check_perm_dacl(), causing an out-of-bounds read during a subsequent file CREATE. The issue arises when ace->size and the ACE layout permit reading access_req (offset 4) and sid...

CVE-2026-31712 ksmbd: require minimum ACE size in smb_check_perm_dacl()

In the Linux kernel, the following vulnerability has been resolved: ksmbd: require minimum ACE size in smbcheckpermdacl Both ACE-walk loops in smbcheckpermdacl only guard against an under-sized remaining buffer, not against an ACE whose declared ace-size is smaller than the struct it claims to...

CVE-2026-31709 smb: client: validate the whole DACL before rewriting it in cifsacl

In the Linux kernel, the following vulnerability has been resolved: smb: client: validate the whole DACL before rewriting it in cifsacl buildsecdesc and idmodetocifsacl derive a DACL pointer from a server-supplied dacloffset and then use the incoming ACL to rebuild the chmod/chown security...

EUVD-2026-26518

In the Linux kernel, the following vulnerability has been resolved: smb: client: validate the whole DACL before rewriting it in cifsacl buildsecdesc and idmodetocifsacl derive a DACL pointer from a server-supplied dacloffset and then use the incoming ACL to rebuild the chmod/chown security...

CVE-2026-31709 smb: client: validate the whole DACL before rewriting it in cifsacl

In the Linux kernel, the following vulnerability has been resolved: smb: client: validate the whole DACL before rewriting it in cifsacl buildsecdesc and idmodetocifsacl derive a DACL pointer from a server-supplied dacloffset and then use the incoming ACL to rebuild the chmod/chown security...

CVE-2026-31706 ksmbd: validate num_aces and harden ACE walk in smb_inherit_dacl()

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate numaces and harden ACE walk in smbinheritdacl smbinheritdacl trusts the on-disk numaces value from the parent directory's DACL xattr and uses it to size a heap allocation: acesbase = kmallocsizeofstruct smbace...

CVE-2026-31706

In ksmbd (Linux kernel), CVE-2026-31706 is due to a validation flaw in smb_inherit_dacl(): the on-disk num_aces from a parent directory’s security.NTACL is trusted to size a heap allocation (kmalloc(sizeof(struct smb_ace) * num_aces * 2)) without verifying consistency with pdacl_size. An authenti...

CVE-2026-31706

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate numaces and harden ACE walk in smbinheritdacl smbinheritdacl trusts the on-disk numaces value from the parent directory's DACL xattr and uses it to size a heap allocation: acesbase = kmallocsizeofstruct smbace...

CVE-2026-31706 ksmbd: validate num_aces and harden ACE walk in smb_inherit_dacl()

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate numaces and harden ACE walk in smbinheritdacl smbinheritdacl trusts the on-disk numaces value from the parent directory's DACL xattr and uses it to size a heap allocation: acesbase = kmallocsizeofstruct smbace...

CVE-2026-31706

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate numaces and harden ACE walk in smbinheritdacl smbinheritdacl trusts the on-disk numaces value from the parent directory's DACL xattr and uses it to size a heap allocation: acesbase = kmallocsizeofstruct smbace...

EUVD-2026-26515

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate numaces and harden ACE walk in smbinheritdacl smbinheritdacl trusts the on-disk numaces value from the parent directory's DACL xattr and uses it to size a heap allocation: acesbase = kmallocsizeofstruct smbace...

EUVD-2026-26513

In the Linux kernel, the following vulnerability has been resolved: ksmbd: use checkaddoverflow to prevent u16 DACL size overflow setposixaclentriesdacl and setntacldacl accumulate ACE sizes in u16 variables. When a file has many POSIX ACL entries, the accumulated size can wrap past 65535, causin...

CVE-2026-31704 ksmbd: use check_add_overflow() to prevent u16 DACL size overflow

In the Linux kernel, the following vulnerability has been resolved: ksmbd: use checkaddoverflow to prevent u16 DACL size overflow setposixaclentriesdacl and setntacldacl accumulate ACE sizes in u16 variables. When a file has many POSIX ACL entries, the accumulated size can wrap past 65535, causin...

PT-2026-36336

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the ksmbd module where the smb inherit dacl function trusts the num aces value from a parent directory's DACL xattr to determine the size of a heap allocation. An...