CVE-2026-89792

CVE-2026-89792 is an out-of-bounds read vulnerability in the ksmbd (in-kernel SMB server) component of the Linux kernel . The root cause is insufficient validation of IPC share configuration payload sizes before consuming variable-length fields: the veto list parsing is unbounded, and the separat...

EUVD-2026-80309

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix tree connection use-after-free in smb2treeconnect ksmbdtreeconnconnect publishes a new tree connection in sess-treeconns with a single reference and returns its pointer to smb2treeconnect. The handler continues to...

CVE-2026-89788

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix tree connection use-after-free in smb2treeconnect ksmbdtreeconnconnect publishes a new tree connection in sess-treeconns with a single reference and returns its pointer to smb2treeconnect. The handler continues to...

CVE-2026-89788 ksmbd: fix tree connection use-after-free in smb2_tree_connect()

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix tree connection use-after-free in smb2treeconnect ksmbdtreeconnconnect publishes a new tree connection in sess-treeconns with a single reference and returns its pointer to smb2treeconnect. The handler continues to...

CVE-2026-89788

CVE-2026-89788 is a use-after-free vulnerability in the Linux kernel's ksmbd (SMB server) subsystem, specifically in smb2_tree_connect() (fs/smb/server/smb2pdu.c). A race condition exists where ksmbd_tree_conn_connect() publishes a new tree connection with a single reference, but a concurrent ses...

SMB-LINUX-CVE-2025-37899

Vulnerabilidad Use-After-Free en ksmbd del Kernel de Linux CVE-2025-37899 Descripción Se ha descubierto una vulnerabilidad de tipo use-after-free en el módulo ksmbd del kernel de Linux, responsable de la implementación del protocolo SMB Server Message Block para el intercambio de archivos en red...

ksmbd-n-day

README Este repositorio acompaña a mi artículo de investigación Eternal-Tux: Crafting a Linux Kernel KSMBD 0-Click RCE Exploit from N-Days, en el que desarrollo un POC para n-days de 2023: CVE-2023-52440 y CVE-2023-4130. Proporciono el kernel .config, un script de ejecución del kernel, un script ...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: ksmbd: Validates the session ID and tree ID in compound requests. The function smb2getmsg in smb2getksmbdtcon and smb2checkusersession always returns the first command in a compound request’s headers. If SMB2TREECONNECTHE is the...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: ksmbd: fixed a possible memory leak in smb2lock. argv needs to be freed when setupasyncwork fails, or when the current process is awakened...

Astra Linux – Vulnerability in Linux 5.15

A flaw was discovered in the ksmbd component of the Linux kernel, a high-performance in-kernel SMB server. The specific flaw occurs during the handling of SMB2LOGOFF commands. The issue arises from the lack of proper validation of a pointer before accessing it. An attacker can exploit this...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: ksmbd: Fixed a slab-out-of-bounds issue in initsmb2rsphdr. When smb1 mounting fails, KASAN detects a slab-out-of-bounds issue in initsmb2rsphdr, as follows. For smb1’s negotiate56 bytes, initsmb2rsphdr is called for smb2. The iss...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: ksmbd: ipc: Fix for use-after-free in ipcmsgsendrequest The ipcmsgsendrequest function waits for a generic netlink reply using an ipcmsgtableentry on the stack. The generic netlink handler handlegenericevent/handleresponse fil...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: ksmbd: smbdirect: verifyremainingdatalength respects maxfragmentedrecvsize This issue is related to the check for dataoffset + datalength...

Astra Linux – Vulnerability in Linux 5.15

A flaw was discovered in the ksmbd component of the Linux kernel. A deadlock occurs when multiple session setup requests are sent simultaneously, which may lead to a denial of service...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: ksmbd: Fixed a potential out-of-bounds write issue in getfileallinfo for compound requests. When a compound request consists of QUERYDIRECTORY + QUERYINFO FILEALLINFORMATION, and the first command consumes nearly the entire...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: smb: server: splitting ksmbdrdmastoplistening from ksmbdrdmaDestroy We cannot call destroyworkqueuesmbdirectwq; before stopsessions! Otherwise, existing connections will attempt to use smbdirectwq as a NULL pointer...

Astra Linux – Vulnerability in Linux 5.15

A issue was discovered in ksmbd within the Linux kernel versions 5.15 through 5.19, prior to 5.19.2. There is an out-of-bounds read and an OOPS error for SMB2write, when a large length is present in the zero DataOffset case. source-iocs-preserved const=SMB2WRITE...

Linux Distros Unpatched Vulnerability : CVE-2026-89635

"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - ksmbd: only rebind the reopened file's own oplock on durable reconnect ksmbdreopendurablefd walks the inode's moplist and rebinds every detached oplock to the...

Linux Distros Unpatched Vulnerability : CVE-2026-80926

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 oplock break notification smb2oplockbreaknoti reads opinfo-conn without any lock and dereferences it after two allocations which ma...

CVE-2026-89635

A flaw was found in ksmbd, a component of the Linux kernel. An authenticated attacker could exploit a use-after-free vulnerability by manipulating durable handles and oplocks during session reconnection. When two sessions hold durable handles on the same file and both disconnect, reconnecting one...