kernel: fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath

A flaw was found in the Linux kernel's CIFS Common Internet File System client. When the cifssanitizeprepath function processes specially crafted input, such as an empty string or a string containing only delimiters, it can attempt to read data beyond its allocated memory buffer. This out-of-boun...

kernel: fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath

A flaw was found in the Linux kernel's CIFS Common Internet File System client. When the cifssanitizeprepath function processes specially crafted input, such as an empty string or a string containing only delimiters, it can attempt to read data beyond its allocated memory buffer. This out-of-boun...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-098860)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-098860 advisory. In the Linux kernel, the following vulnerability has been resolved: fs/smb/client: fix out-of-bounds read in cifssanitizeprepath When cifssanitizeprepath is called...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-098699)

"The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-098699 advisory. In the Linux kernel, the following vulnerability has been resolved: net: Fix null-ptr-deref by socklockinitclassandname and rmmod. When I ran the repro 0 and waited...

Important: Red Hat Security Advisory: OpenShift Container Platform 4.21.30 bug fix and security update

Red Hat OpenShift Container Platform release 4.21.30 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red Hat OpenShift Container Platform 4.21. Red Hat Product Security has rated this update as having a...

The vulnerability of the cifs_set_cifscreds() function in the fs/smb/client/connect.c module of the Smb file system in the Linux operating system allows a hacker to cause a service failure.

The vulnerability of the cifssetcifscreds function in the fs/smb/client/connect.c module of the Smb file system in Linux kernel is related to the unencrypted storage of critical information. Exploiting this vulnerability could allow an attacker to cause service failures...

CVE-2026-74608

A flaw was found in the Server Message Block SMB client of the Linux kernel. A use-after-free vulnerability exists in the cifstryaddingchannels function. This occurs when a concurrent interface list refresh removes a reference to an interface while a channel creation is in progress and fails,...

Astra Linux – Vulnerability found in Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: ksmbd: The “binding mark” of a reused connection was unset. Steve French reported a null pointer dereference error from the sha256 lib. The cifs.ko module can send session setup requests using a reused connection. If a reused...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: cifs: A memory leak was fixed in the deferred close operation. The xfstests tests on smb21 report kmemleak as follows: unreferenced object 0xffff8881767d6200 size 64: comm "xfsio", pid 1284, jiffies 4294777434 age 20.789s Hex...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: cifs: preventing use-after-free by freeing the cfile later. In smb2compoundop, there is a potential use-after-free that may lead to difficult debugging issues in the future. This issue was identified during stress testing with th...

Astra Linux – Vulnerability found in Linux 5.15, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: cifs: Fixed an oops due to uninitialized server-smbdconn during reconnection. In smbdDestroy, the server-smbdconn pointer is cleared after freeing the smbdconnection structure it points to, so that reconnection won’t be confused...

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

In the Linux kernel, the following vulnerabilities have been resolved: cifs: Fixed warnings and UAF errors when destroying the MR list. If the MR allocation fails, the MR recovery process is not initialized, and the list is not cleared. This will result in warnings and UAF errors when releasing t...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: cifs: fixed a small mempool leak in SMB2negotiate. In some cases of failures dialect mismatches in SMB2negotiate, after the request is sent, the checks would return -EIO. Instead, it should return rc = -EIO and then jump to negex...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: smb3: Fixed the potential deadlock due to lock ordering in the cifssyncmidresult function. Coverity identified that the cifssyncmidresult function could lead to a deadlock. “Thread deadlock ORDERREVERSAL lockorder: Calling spinlo...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: TCP: fixed page frag corruption upon a page fault. Steffen reported a corruption of the TCP stream for HTTP requests served by the Apache web-server, using a CIFS mount-point and the corresponding file’s memory mapping. The root...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: cifs: fixed the potential use of a null pointer in destroyworkqueue within the error path of initcifs. Dan Carpenter reported a Smack static checker warning: fs/smb/client/cifsfs.c:1981 initcifs Error: We previously assumed th...

Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: cifs: Fixed the xid leak in cifssesaddchannel. Before returning, it is necessary to free the xid; otherwise, the xid will be leaked...

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

In the Linux kernel, the following vulnerability has been resolved: cifs: fixed a underflow issue in parseserverinterfaces. In this loop, we iterate through the buffer. After processing each item, we check whether the sizeleft is greater than the minimum size required. However, the problem arises...

Astra Linux – Vulnerability found in Linux 5.15, Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: RDMA/rxe: Fixed a NULLptrderef in rxeqpdocleanup, when socket creation fails. There is a NULLptrderef in the mount.cifs operation over RDMA: - BUG: KASAN: NULLptrderef in rxeqpdocleanup+0x2f3/0x360 rdmarxe - Reading of a 8-byt...

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...