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 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

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

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: ksmbd: Do not expire a session when a binding attempt fails. When a multichannel session binding request fails e.g., due to an incorrect password, the error path unconditionally sets sess-state to SMB2SESSIONEXPIRED. However,...

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 in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: ksmbd: The call to ksmbdvfskernpathendremoving is performed on some error paths. There are two places where ksmbdvfskernpathendremoving needs to be called in order to balance what the corresponding successful call to...

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

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 found in Linux 5.15, Linux 6.1

A issue was discovered in ksmbd within the Linux kernel before version 6.6.10. The smb2getdataarealen function in fs/smb/server/smb2misc.c can lead to an out-of-bounds access via smbstrndupfromutf16, due to improper handling of the relationship between the Name data and the CreateContexts data...

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 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 SMB2TREEDISCONNECT 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 6.1

In the Linux kernel, the following vulnerability has been resolved: ksmbd: The hardcoded hdr2len parameter was replaced with the offsetof function in smb2calcmaxoutbuflen. After this commit e2b76ab8b5c9 "ksmbd: add support for read compound", the management of response buffers was changed to use ...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: ksmbd: Fixed a resource leak in ksmbdsessionrpcopen. When ksmbdrpcopen fails, it must call ksmbdrpcidfree to undo the results of ksmbdipcidalloc...

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. ksmbd has a buffer overflow vulnerability in the smb2findcontextvals function, when the namelen of createcontext is larger than the length of the tag...

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...

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 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 contains a use-after-free condition and an OOPS error related to SMB2TREEDISCONNECT...

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...