KSMBDrain

Panoramica Exploit proof-of-concept per KSMBDrain CVE-2025-38501. Consente di esaurire da remoto il limite di connessioni del server KSMBD. Dettagli Un attaccante remoto può esaurire il limite massimo di connessioni di un server KSMBD eseguendo il three-way handshake TCP e poi non rispondendo ai...

SMB-LINUX-CVE-2025-37899

Vulnerabilità Use-After-Free in ksmbd del Kernel Linux CVE-2025-37899 Descrizione È stata scoperta una vulnerabilità di tipo use-after-free nel modulo ksmbd del kernel di Linux, responsabile dell'implementazione del protocollo SMB Server Message Block per lo scambio di file in rete. Questa...

ksmbrace

ksmbrace Ricerca di vulnerabilità in ksmbd , il server SMB3 nel kernel Linux fs/smb/server/. Difetti lato attaccante autenticato sui percorsi durable-handle e di risoluzione dei path di ksmbd. Il nome richiama il tema della race condition di questa linea di lavoro vedi la UAF sul byte-range-lock...

ksmbd-n-day

README Dieses Repository begleitet meinen Forschungsartikel Eternal-Tux: Crafting a Linux Kernel KSMBD 0-Click RCE Exploit from N-Days, in dem ich einen POC für N-Days aus dem Jahr 2023 entwickle: CVE-2023-52440 und CVE-2023-4130. Ich stelle die Kernel-Konfiguration .config, ein Kernel-Startskrip...

CVE-2026-74522

A flaw was found in ksmbd, a component of the Linux kernel. This use-after-free vulnerability occurs when a ksmbd file object is prematurely freed while another session still holds a reference to it. This can lead to the system attempting to access freed memory, potentially causing a system crash...

CVE-2026-74521

A flaw was found in ksmbd, a Linux kernel module that provides an in-kernel Server Message Block SMB server. This vulnerability stems from a logic error in how ClientGUIDs, which are unique client identifiers, are compared. The strncmp function, used for this comparison, stops at the first null...

CVE-2026-72492

A flaw was found in ksmbd, the in-kernel SMB3 server for Linux. This memory corruption vulnerability, known as a use-after-free, occurs when the system attempts to use memory after it has been released. A remote attacker could trigger this by performing a concurrent close operation during lease...

CVE-2026-72382

A flaw was found in ksmbd in the Linux kernel. A remote attacker, by sending a specially crafted security descriptor with an undersized Discretionary Access Control List DACL during an SMB2SETINFO operation, can trigger an integer underflow. This underflow leads to excessive memory allocations fo...

CVE-2026-72422

A flaw was found in ksmbd, the in-kernel SMB3 server for Linux. A remote attacker could exploit a use-after-free vulnerability by sending specially crafted concurrent SMB2 NEGOTIATE requests on the same connection. This could lead to memory corruption, potentially allowing the attacker to execute...

CVE-2026-72381

A flaw was found in ksmbd, the in-kernel SMB3 server for Linux. A remote attacker can exploit a race condition by initiating two concurrent SMB2 durable reconnects with the same persistent ID. This can lead to a use-after-free error, where freed memory is accessed, potentially causing system...

Linux Distros Unpatched Vulnerability : CVE-2026-72492

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - ksmbd: fix use-after-free in sameclienthaslease sameclienthaslease returns an opinfo pointer from ci-moplist after dropping ci-mlock without taking a reference...

Linux Distros Unpatched Vulnerability : CVE-2026-72381

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - ksmbd: fix use-after-free of fp-owner.name in durable handle owner check Two concurrent SMB2 durable reconnects DH2C/DHnC on the same persistentid race the...

Linux Distros Unpatched Vulnerability : CVE-2026-72422

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - ksmbd: fix use-after-free of conn-preauthinfo in concurrent SMB2 NEGOTIATE conn-preauthinfo is shared connection state struct preauthintegrityinfo, kmalloc-96...

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...

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...