CVE-2026-72044

A flaw was found in ksmbd in the Linux kernel. A stack buffer overflow vulnerability exists in the multichannel session-key copy mechanism. A remote attacker can exploit this by supplying a crafted session key larger than the intended buffer size during a binding session setup. This can lead to a...

CVE-2026-74494

A flaw was found in ksmbd, a kernel module for SMB3 protocol support. An unauthenticated client can send multiple SMB2 NEGOTIATE requests on a single connection before a session is established. This leads to a memory leak, as previous allocations are not properly freed. Repeated exploitation of...

CVE-2026-68457

A flaw was found in ksmbd in the Linux kernel. This vulnerability allows certain file system control FSCTL operations, specifically SETSPARSE, SETZERODATA, and SETCOMPRESSION, to use incorrect credentials. Consequently, these operations can bypass the security checks established when the file was...

K000162949: Linux kernel vulnerabilities CVE-2026-53383, CVE-2026-53390

Security Advisory Description CVE-2026-53383 In the Linux kernel, the following vulnerability has been resolved: ksmbd: reject non-VALID session in compound request branch smb2checkusersession takes a shortcut for any operation that is not the first in a COMPOUND request: it reuses work-sess the...

SUSE CVE-2026-74494

In the Linux kernel, the following vulnerability has been resolved: ksmbd: reject repeated SMB2 NEGOTIATE requests Unauthenticated client can send multiple successful SMB2 NEGOTIATE requests on one connection before SESSIONSETUP. While the connection is in KSMBDSESSNEEDSETUP, smb2handlenegotiate...

SUSE CVE-2026-74521

In the Linux kernel, the following vulnerability has been resolved: ksmbd: use memcmp to compare ClientGUIDs ClientGUID is a fixed-size binary value and can contain embedded NUL bytes. strncmp stops comparing at the first NUL byte, so different ClientGUID values can incorrectly be treated as equa...

SUSE CVE-2026-74522

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in closefiletableids A ksmbdfile can remain alive after logical close while another session holds a temporary reference obtained through ksmbdlookupfdinode. ksmbdclosefd currently marks the file closed a...

CVE-2026-74521

In the Linux kernel, the following vulnerability has been resolved: ksmbd: use memcmp to compare ClientGUIDs ClientGUID is a fixed-size binary value and can contain embedded NUL bytes. strncmp stops comparing at the first NUL byte, so different ClientGUID values can incorrectly be treated as equa...

CVE-2026-74522

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in closefiletableids A ksmbdfile can remain alive after logical close while another session holds a temporary reference obtained through ksmbdlookupfdinode. ksmbdclosefd currently marks the file closed a...

CVE-2026-74494

In the Linux kernel, the following vulnerability has been resolved: ksmbd: reject repeated SMB2 NEGOTIATE requests Unauthenticated client can send multiple successful SMB2 NEGOTIATE requests on one connection before SESSIONSETUP. While the connection is in KSMBDSESSNEEDSETUP, smb2handlenegotiate...

UBUNTU-CVE-2026-74521

In the Linux kernel, the following vulnerability has been resolved: ksmbd: use memcmp to compare ClientGUIDs ClientGUID is a fixed-size binary value and can contain embedded NUL bytes. strncmp stops comparing at the first NUL byte, so different ClientGUID values can incorrectly be treated as equa...

UBUNTU-CVE-2026-74522

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in closefiletableids A ksmbdfile can remain alive after logical close while another session holds a temporary reference obtained through ksmbdlookupfdinode. ksmbdclosefd currently marks the file closed a...

UBUNTU-CVE-2026-74494

In the Linux kernel, the following vulnerability has been resolved: ksmbd: reject repeated SMB2 NEGOTIATE requests Unauthenticated client can send multiple successful SMB2 NEGOTIATE requests on one connection before SESSIONSETUP. While the connection is in KSMBDSESSNEEDSETUP, smb2handlenegotiate...

CVE-2026-74494

In the Linux kernel, the following vulnerability has been resolved: ksmbd: reject repeated SMB2 NEGOTIATE requests Unauthenticated client can send multiple successful SMB2 NEGOTIATE requests on one connection before SESSIONSETUP. While the connection is in KSMBDSESSNEEDSETUP, smb2handlenegotiate...

CVE-2026-74521

In the Linux kernel, the following vulnerability has been resolved: ksmbd: use memcmp to compare ClientGUIDs ClientGUID is a fixed-size binary value and can contain embedded NUL bytes. strncmp stops comparing at the first NUL byte, so different ClientGUID values can incorrectly be treated as equa...

CVE-2026-74522

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in closefiletableids A ksmbdfile can remain alive after logical close while another session holds a temporary reference obtained through ksmbdlookupfdinode. ksmbdclosefd currently marks the file closed a...

CVE-2026-74522 ksmbd: fix use-after-free in __close_file_table_ids()

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in closefiletableids A ksmbdfile can remain alive after logical close while another session holds a temporary reference obtained through ksmbdlookupfdinode. ksmbdclosefd currently marks the file closed a...

CVE-2026-74521 ksmbd: use memcmp() to compare ClientGUIDs

In the Linux kernel, the following vulnerability has been resolved: ksmbd: use memcmp to compare ClientGUIDs ClientGUID is a fixed-size binary value and can contain embedded NUL bytes. strncmp stops comparing at the first NUL byte, so different ClientGUID values can incorrectly be treated as equa...

EUVD-2026-59714

In the Linux kernel, the following vulnerability has been resolved: ksmbd: use memcmp to compare ClientGUIDs ClientGUID is a fixed-size binary value and can contain embedded NUL bytes. strncmp stops comparing at the first NUL byte, so different ClientGUID values can incorrectly be treated as equa...

CVE-2026-74522

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in closefiletableids A ksmbdfile can remain alive after logical close while another session holds a temporary reference obtained through ksmbdlookupfdinode. ksmbdclosefd currently marks the file closed a...