Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: SMB3: Added missing locks to protect the deferred close file list. The cifsdeldeferredclose function has a critical section that modifies the deferred close file list. We must acquire the deferredlock before calling the...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: smb: client: fixed an incomplete backport in cfidsinvalidationworker The previous commit bdb596ceb4b7 “smb: client: fixed a potential UAF in smb2closecachedfid” was an incomplete backport. It also missed one krefput call in...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: smb: server: The use of smbdirectsocketrecvio.credits.available has been removed. The logic for managing recv credits by counting posted recvio and granted credits is flawed. This is because the peer might have already consumed a...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: smb: client: Fixed a potential Use-after-Allocation UAF in cifsstatsprocwrite. Skipped sessions that are being terminated status == SESEXITING to avoid UAF...

Astra Linux – Vulnerability in Linux 5.10, Linux, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: cifs: Fixed the issue where the smbd connection was lost and destroyed when the MR allocation failed. If the MR allocation fails, the smbdDestroy function will return NULL, and the connection information will be leaked. We need t...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: smb: Initialize cfid-tcon before performing network operations. Avoid leaking a reference to tcon when a lease-break operation occurs, especially when opening the cached directory. Processing the lease-break operation might requi...

Astra Linux – Vulnerability in Linux 5.15

A issue was discovered in the Linux kernel before version 6.3.8. The file fs/smb/server/smb2pdu.c in ksmbd contains an integer underflow and an out-of-bounds read during the deassemblenegcontexts function...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: ksmbd: Fixed a signedness bug in smbdirectpreparenegotiation. The function smbdirectpreparenegotiation casts a unsigned u32 value from sp-maxrecvsize and req-preferredsendsize into a signed int before calculating mintint, .......

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: ksmbd: Fixed issues with use-after-free and NULL dereferencing in smbgrantoplock. smbgrantoplock has two issues in the oplock publication sequence: 1 opinfo is linked into ci-moplist via opinfoadd before addleasegloballist is...

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 5.10

In the Linux kernel, the following vulnerability has been resolved: fs/smb/client: fixed an out-of-bounds read in cifssanitizeprepath. When cifssanitizeprepath is called with an empty string or a string containing only delimiters e.g., /, the current logic attempts to check cursor2 - 1 before...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.10, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: smb: client: Fixed a potential Use-after-Allocation UAF in cifsstatsprocshow. Skipped sessions that are being terminated status == SESEXITING to avoid UAF...

Astra Linux – Vulnerability in Linux 6.1

A use-after-free vulnerability in the Linux kernel’s fs/smb/client component can be exploited to gain local privilege escalation. In the event of an error in smb3fscontextParseparam, the ctx-password variable is freed, but the variable is not set to NULL, which could lead to a double-free. We...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: smb: client: fixed a use-after-free in smb2queryinfocompound The following UAF was triggered when running fstests generic/072 with KASAN enabled against Windows Server 2022 and mount options “multichannel, maxChannels=2,...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: smb: client: fixed a potential Use-after-Allocation error in cifs.debugfilesprocshow. Skipped sessions that are being terminated status == SESEXITING to avoid UAF Use-after-Allocation errors...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: smb: client: Fixed an oops due to uninitialized variables in smb2unlink. If SMB2openinit or SMB2closeinit fails e.g., due to reconnection, the iovs structure @rqst may remain uninitialized. As a result, calling SMB2openfree,...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in durable v2 replay of active file handles parsedurablehandlecontext unconditionally assigns dhinfo-fp-conn to the current connection when handling a DURABLEREQV2 context with SMB2FLAGSREPLAYOPERATION...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: smb: server: Fixed a leak in activenumconn when there is a failure in transport allocation. The commit 77ffbcac4e56 “smb: server: fixed the leak in activenumconn in ksmbdtcpnewconnection” addresses the failure path in kthreadrun...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: ksmbd: Fixed an issue where shareconf was freed after use, in compound requests. smb2getksmbdtcon reuses work-tcon in compound requests without validating tcon-tstate. ksmbdtreeconnlookup checks that tstate is equal to...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15, Linux 6.1

A flaw was discovered in the handling of SMB2READ commands within the kernel’s ksmbd module. The issue arises from failing to release memory after its effective lifespan has ended. An attacker can exploit this flaw to create a denial-of-service condition on affected Linux installations...