Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: smb/server: The function ksmbdsessionrpcclose is called on the error path in the createsmb2pipe function. When the ksmbdiovpinrsp function fails, we should call ksmbdsessionrpcclose...

Astra Linux – Vulnerability found in Linux 5.15, Linux 6.1

A flaw was discovered in the handling of SMB2 read requests within the kernel’s ksmbd module. The issue arises due to the lack of proper validation of user-provided data, which can lead to reading data beyond the end of an allocated buffer. An attacker can exploit this vulnerability to disclose...

Astra Linux – Vulnerability found in Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: ksmbd: a out-of-bounds error in initsmb2rsphdr has been fixed. If a client sends a SMB2 negotiate request and then a SMB1 negotiate request, initsmb2rsphdr is called for the SMB1 negotiate request, since needneg is set to false...

Astra Linux – Vulnerability in Linux 5.15

A issue was discovered in the Linux kernel before version 6.3.9. ksmbd does not validate the SMB request protocol ID, resulting in an out-of-bounds read...

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 exists in the processing of SMB2SESSIONSETUP commands. The issue arises due to the lack of proper locking when performing operations on an object. An attacker can exploit...

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 6.1

In the Linux kernel, the following vulnerabilities have been resolved: ksmbd: Fixed memory leaks and NULL dereferencing in smb2lock. smb2lock has three error handling issues after listdel detaches smblock from locklist at nocheckcl: 1 If vfslockfile returns an unexpected error in the non-UNLOCK...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fixed the use-of-free issue in session logoff. The sess-user object may currently be used by another thread. For example, if another connection sends a session setup request to make the session available for use. The...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: ksmbd: The race condition related to PreauhHashValue has been fixed. If a client sends multiple session setup requests to ksmbd, a race condition related to PreauhHashValue may occur. There is no need to free sess-PreauhHashValue...

Astra Linux – Vulnerability in Linux 5.15

A issue was discovered in the Linux kernel before version 6.3.4. In the fs/ksmbd/connection.c file of ksmbd, there is an off-by-one error in memory allocation due to ksmbdsmb2checkmessage, which may lead to out-of-bounds access...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: ksmbd: The issue of slub overflow in ksmbddecodentlmsspauthblob has been fixed. If authblob-SessionKey.Length is larger than the size of the session key CIFSKEYSIZE, slub overflow can occur in the key exchange process. The functi...

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 exists in 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...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: ksmbd: Corrected the incorrect validation of the next buffer length in smb2setea. There are multiple smb2eainfo buffers in the FILEFULLEAINFORMATION request from the client. ksmbd uses the NextEntryOffset of the current...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: ksmbd: Fixed a NULL pointer dereferencing issue in smb2getinfofilesystem. If share is provided, share-path will be NULL, which can lead to a NULL pointer dereferencing issue...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: ksmbd: A use-after-free issue was fixed in ksmbdsessionsderegister. In multi-channel mode, a UAF Use-After-Free issue can occur in sessionderegister, when the second channel establishes a session through the connection of the fir...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: ksmbd: discard write access to the directory open The mayopen function does not allow a directory to be opened with write access. However, some writing flags set by clients result in adding write access on the server, making ksmb...

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/smb2misc.c contains an out-of-bounds read and an OOPS error related to the SMB2TREECONNECT function...

Astra Linux – Vulnerability in Linux 5.15

A bug affects the ksmbd NTLMv2 authentication of the Linux kernel, and it is known to cause the operating system to crash immediately in Linux-based systems...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: ksmbd: A memory leak was fixed in the parseleasestate function. The previous patch that added a bounds check for the create lease context introduced a memory leak. When the bounds check fails, the function returns NULL, without...

Astra Linux – Vulnerability in Linux 5.15

A issue was discovered in the Linux kernel before version 6.3.4. In the file fs/ksmbd/smb2pdu.c of ksmbd, there is a flaw where the UserName value is not properly checked. This occurs because the address of the security buffer is not taken into consideration, resulting in a out-of-bounds read...