CVE-2026-20921 Windows SMB Server Elevation of Privilege Vulnerability

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CVE-2026-20919

CVE-2026-20919 is a race-condition vulnerability in Windows SMB Server that allows an authorized network attacker to elevate privileges. The issue concerns concurrent access to a shared resource without proper synchronization. Public documentation in the connected sources confirms Windows SMB Ser...

CVE-2026-20919

Concurrent execution using shared resource with improper synchronization 'race condition' in Windows SMB Server allows an authorized attacker to elevate privileges over a network...

CVE-2026-20919 Windows SMB Server Elevation of Privilege Vulnerability

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UBUNTU-CVE-2025-68817

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in ksmbdtreeconnectput under concurrency Under high concurrency, A tree-connection object tcon is freed on a disconnect path while another path still holds a reference and later executes put/write on it...

Windows SMB Server Denial of Service Vulnerability

Concurrent execution using shared resource with improper synchronization 'race condition' in Windows SMB Server allows an authorized attacker to deny service over a network...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: smb: client: let smbddestroy call disableworksync&info-postsendcreditswork In smbdDestroy, we may destroy the memory, so it’s better to wait until postsendcreditswork is no longer pending and will never be started again. I actual...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: smb: Client: Fixed a potential Use-After-Free issue in smb2closecachedfid. findorcreatecacheddir might acquire a new reference after krefput. This occurs when the reference count drops to zero, but before cfidlistlock is acquired...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: smb: client: Fixed incorrect index references in smb2compoundop. In smb2compoundop, the loop that processes each command’s response uses incorrect indices when accessing response buffers. This incorrect indexing leads to improper...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerabilities have been resolved: cifs: Client: Fixed a memory leak in smb3fsCONTEXTPARSEPARAM. The user calls fsconfig twice, but when the program exits, free only frees ctx-source for the second call to fsconfig, not the first. Regarding fc-source, there is ...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: smb: client: fixed a potential use-after-free in smb2queryinfocompound When smb2QueryInfoCompounded attempts to retry, the previously allocated cfid might have been freed during the first attempt. Since the cfid was not reset...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix crypto buffers in non-linear memory The crypto API, through the scatterlist API, expects input buffers to be in linear memory. We handle this by using the cifssgsetbuf helper function, which converts vmalloc’d...

kernel: smb: client: fix race with concurrent opens in rename(2)

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix race with concurrent opens in rename2 Besides sending the rename request to the server, the rename process also involves closing any deferred close, waiting for outstanding I/O to complete as well as marking all...

Microsoft Windows SMB Server 竞争条件问题漏洞

Microsoft Windows SMB Server is a network file-sharing protocol from Microsoft. It allows applications on a computer to read and write files and request services from server programs on a computer network. A denial of service vulnerability exists in Microsoft Windows SMB Server, which is caused d...

ROS-20260113-7372

A vulnerability in the smb2read function of the fs/smb/server/smb2pdu.c module of the SMB subsystem of the Linux operating system kernel is related to the failure to free memory after an effective lifetime. Exploitation of the vulnerability could allow an attacker acting remotely to cause a denia...

PT-2026-2736

CVE-2026-20934 Concurrent execution using shared resource with improper synchronization 'race condition' in Windows SMB Server allows an authorized attacker to elevate privileges … https://t.co/zKlEBGeVSJ...

Microsoft Windows SMB Server 竞争条件问题漏洞

Microsoft Windows SMB Server is a network file-sharing protocol from Microsoft. It allows applications on a computer to read and write files and request services from server programs on a computer network. An elevation of privilege vulnerability exists in Microsoft Windows SMB Server due to...

Microsoft Windows SMB Server 竞争条件问题漏洞

Microsoft Windows SMB Server is a network file-sharing protocol from Microsoft. It allows applications on a computer to read and write files and request services from server programs on a computer network. An elevation of privilege vulnerability exists in Microsoft Windows SMB Server due to...

CVE-2020-24772

In Dreamacro Clash for Windows v0.11.4, an attacker could embed a malicious iframe in a website with a crafted URL that would launch the Clash Windows client and force it to open a remote SMB share. Windows will perform NTLM authentication when opening the SMB share and that request can be relaye...

CLSA-2026-1767867153 kernel: Fix of 16 CVEs

crypto: lzo - Fix compression buffer overrun CVE-2025-38068 - wifi: brcmfmac: fix use-after-free when rescheduling brcmfbtcoexinfo work CVE-2025-39863 - NFSD: Protect against send buffer overflow in NFSv2 READ CVE-2022-43945 - tcp: Clear tcpsksk-fastopenrsk in tcpdisconnect. CVE-2025-40186 - can:...