Astra Linux – vulnerability in linux-6.1

In the Linux kernel, the following vulnerability has been resolved: ksmbd: set ATTRCTIME flags when setting mtime David reported that the new warning from setattrcopymgtime appears as follows. 113.215316 ------------ cut here ------------ 113.215974 WARNING: CPU: 1 PID: 31 at fs/attr.c:300...

Astra Linux – vulnerability in linux-5.15

A flaw was found in the Linux kernel’s ksmbd, a high-performance in-kernel SMB server. The specific flaw exists within the processing of SMB2LOGOFF and SMB2CLOSE commands. The issue arises from the lack of proper locking when performing operations on an object. An attacker can exploit this...

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...

Astra Linux – vulnerability in linux-5.15

An issue was found in the Linux kernel prior to version 6.3.4. In ksmbd, the file fs/ksmbd/smb2pdu.c fails to properly validate the UserName value; it disregards the address of the security buffer, resulting in an out-of-bounds read...

Astra Linux – vulnerability in linux-6.1

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate zero numsubauth before subauth is accessed Accessing psid-subauthpsid-numsubauth - 1 without checking that numsubauth is non-zero results in an out-of-bounds read. This patch adds a validation step to ensure...

Astra Linux – Vulnerability found in Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: ksmbd: Validates the mech token during session setup. If a client sends an invalid mech token in a session setup request, ksmbd validates it and reports an error if the token is invalid...

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. The file fs/ksmbd/smb2pdu.c omits a kfree call in certain error conditions during the smb2handlenegotiate process, resulting in a memory leak...

Astra Linux – Vulnerability in Linux 5.15

A issue was discovered in ksmbd within the Linux kernel versions 5.15 through 5.18, prior to 5.18.18. fs/ksmbd/smb2pdu.c lacks length validation in the non-padding case of smb2write...

Astra Linux – Vulnerability in Linux 5.15

A vulnerability has been identified in the ksmbd component of the Linux kernel the kernel SMB/CIFS server. A security measure designed to prevent dictionary attacks—which introduces a 5-second delay during session setup—can be bypassed through the use of asynchronous requests. This bypass defeats...

CVE-2026-68098 ksmbd: bound DACL dedup walk to copied ACEs

In the Linux kernel, the following vulnerability has been resolved: ksmbd: bound DACL dedup walk to copied ACEs setntacldacl can stop copying ACEs before consuming the full input DACL when size accounting overflows. When that happens, numaces reflects only the ACEs that were actually copied into...

CVE-2026-68097

Summary: CVE-2026-68097 affects the Linux kernel ksmbd path handling POSIX ACLs. The root cause is a check failure in ACE validation: set_ntacl_dacl() validates sid.num_subauth but does not ensure the declared ACE size can contain all sub-authorities, allowing an undersized ACE to be copied and l...

K000162853: Linux Kernel vulnerability CVE-2026-53198

Security Advisory Description In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free of a deferred filelock on double SMB2CANCEL A deferred byte-range lock an SMB2LOCK that blocks registers an async work on conn-asyncrequests via setupasyncwork, with cancelf...

CVE-2026-64437

A flaw was found in the ksmbd component of the Linux kernel. This vulnerability allows an authenticated client using the Server Message Block SMB protocol to trigger a use-after-free error. By sending specific close and cancel requests, an attacker can cause the kernel to crash, leading to a deni...

CVE-2026-64400

In the Linux kernel, the following vulnerability has been resolved: ksmbd: prevent path traversal bypass by restricting caseless retry ksmbdvfspathlookup enforces LOOKUPBENEATH to restrict path resolution within the share root. When a crafted path attempts to escape the share boundary using...

CVE-2026-64400

Summary (CVE-2026-64400) : In the Linux kernel’s ksmbd component, a path traversal bypass could occur due to a caseless retry bug. Specifically, __ksmbd_vfs_kern_path() could skip -EXDEV (a path traversal error) and falsely proceed to a caseless retry, permitting write-capable users to create zer...

CVE-2026-64398

CVE-2026-64398 affects the Linux kernel ksmbd component. A permission check bypass in FSCTL_SET_ZERO_DATA allows an authenticated SMB client with only FILE_WRITE_ATTRIBUTES to zero out file data via fsctl path, bypassing per-handle checks. The operation uses vfs_fallocate(PUNCH_HOLE/ZERO_RANGE) a...

CVE-2026-64393

In the Linux kernel, the following vulnerability has been resolved: ksmbd: run set info with opener credentials SMB2 SETINFO handlers call path-based VFS helpers after checking the access mask granted to the SMB handle. Those helpers perform their owner, inode permission and LSM checks using the...

Linux Distros Unpatched Vulnerability : CVE-2026-64397

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - ksmbd: serialize QUERYDIRECTORY requests per file smb2querydir stores a pointer to its stack- allocated private data in the ksmbdfile readdirdata. Concurrent...

Linux Distros Unpatched Vulnerability : CVE-2026-64400

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - ksmbd: prevent path traversal bypass by restricting caseless retry ksmbdvfspathlookup enforces LOOKUPBENEATH to restrict path resolution within the share root...

Linux Distros Unpatched Vulnerability : CVE-2026-64399

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - ksmbd: add permission checks for FSCTLDUPLICATEEXTENTSTOFILE The FSCTLDUPLICATEEXTENTSTOFILE arm of smb2ioctl overwrites the destination file's data via...