CVE-2026-64437

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free of a deferred filelock on SMB2CLOSE then SMB2CANCEL Commit f580d27e8928 "ksmbd: fix use-after-free of a deferred filelock on double SMB2CANCEL" made smb2cancel skip a work whose state is...

CVE-2026-64437 ksmbd: fix use-after-free of a deferred file_lock on SMB2_CLOSE then SMB2_CANCEL

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free of a deferred filelock on SMB2CLOSE then SMB2CANCEL Commit f580d27e8928 "ksmbd: fix use-after-free of a deferred filelock on double SMB2CANCEL" made smb2cancel skip a work whose state is...

CVE-2026-64437

CVE-2026-64437 affects the ksmbd component of the Linux kernel. A use-after-free in a deferred file_lock can be triggered by a sequence of SMB2_CLOSE followed by SMB2_CANCEL, allowing an authenticated SMB client to cause a kernel crash (denial of service) via the freed file_lock. The root cause i...

EUVD-2026-48781

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free of a deferred filelock on SMB2CLOSE then SMB2CANCEL Commit f580d27e8928 "ksmbd: fix use-after-free of a deferred filelock on double SMB2CANCEL" made smb2cancel skip a work whose state is...

CVE-2026-64437

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free of a deferred filelock on SMB2CLOSE then SMB2CANCEL Commit f580d27e8928 "ksmbd: fix use-after-free of a deferred filelock on double SMB2CANCEL" made smb2cancel skip a work whose state is...

CVE-2026-64396

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix UAF of struct filelock in SMB2LOCK deferred-lock cancellation When a blocking byte-range lock request is deferred in the FILELOCKDEFERRED path, ksmbd registers the asynchronous work into the connection's asyncrequests...

EUVD-2026-48940

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix UAF of struct filelock in SMB2LOCK deferred-lock cancellation When a blocking byte-range lock request is deferred in the FILELOCKDEFERRED path, ksmbd registers the asynchronous work into the connection's asyncrequests...

CVE-2026-64396 ksmbd: fix UAF of struct file_lock in SMB2_LOCK deferred-lock cancellation

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix UAF of struct filelock in SMB2LOCK deferred-lock cancellation When a blocking byte-range lock request is deferred in the FILELOCKDEFERRED path, ksmbd registers the asynchronous work into the connection's asyncrequests...

PT-2026-64617

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix UAF of struct file lock in SMB2 LOCK deferred-lock cancellation When a blocking byte-range lock request is deferred in the FILE LOCK DEFERRED path, ksmbd registers the asynchronous work into the connection's async...

Linux Distros Unpatched Vulnerability : CVE-2026-64396

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - ksmbd: fix UAF of struct filelock in SMB2LOCK deferred-lock cancellation When a blocking byte-range lock request is deferred in the FILELOCKDEFERRED path, ksmbd...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerabilities have been resolved: eventpoll: Fixed an UAF Use-After-Free issue with epremovestruct eventpoll and struct file. The epremove function via epremovefile clears the file-fep field under file-flock, but then continues using @file within the critical...

PYSEC-2026-1374 filelock Time-of-Check-Time-of-Use (TOCTOU) Symlink Vulnerability in SoftFileLock

Vulnerability Summary Title: Time-of-Check-Time-of-Use TOCTOU Symlink Vulnerability in SoftFileLock Affected Component: filelock package - SoftFileLock class File: src/filelock/soft.py lines 17-27 CWE: CWE-362, CWE-367, CWE-59 --- Description A TOCTOU race condition vulnerability exists in the...

Linux Distros Unpatched Vulnerability : CVE-2026-53198

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - ksmbd: fix use-after-free of a deferred filelock on double SMB2CANCEL A deferred byte-range lock an SMB2LOCK that blocks registers an async work on...

SUSE CVE-2026-53198

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free of a deferred filelock on double SMB2CANCEL A deferred byte-range lock an SMB2LOCK that blocks registers an async work on conn-asyncrequests via setupasyncwork, with cancelfn = smb2removeblockedlock and...

CVE-2026-53198

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free of a deferred filelock on double SMB2CANCEL A deferred byte-range lock an SMB2LOCK that blocks registers an async work on conn-asyncrequests via setupasyncwork, with cancelfn = smb2removeblockedlock and...

CVE-2026-53198

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free of a deferred filelock on double SMB2CANCEL A deferred byte-range lock an SMB2LOCK that blocks registers an async work on conn-asyncrequests via setupasyncwork, with cancelfn = smb2removeblockedlock and...

UBUNTU-CVE-2026-53198

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free of a deferred filelock on double SMB2CANCEL A deferred byte-range lock an SMB2LOCK that blocks registers an async work on conn-asyncrequests via setupasyncwork, with cancelfn = smb2removeblockedlock and...

CVE-2026-53198 ksmbd: fix use-after-free of a deferred file_lock on double SMB2_CANCEL

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free of a deferred filelock on double SMB2CANCEL A deferred byte-range lock an SMB2LOCK that blocks registers an async work on conn-asyncrequests via setupasyncwork, with cancelfn = smb2removeblockedlock and...

CVE-2026-53198

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free of a deferred filelock on double SMB2CANCEL A deferred byte-range lock an SMB2LOCK that blocks registers an async work on conn-asyncrequests via setupasyncwork, with cancelfn = smb2removeblockedlock and...

CVE-2026-53198

The CVE-2026-53198 issue affects ksmbd in the Linux kernel: a deferred byte-range lock (SMB2_LOCK) uses async_work with a cancel_fn (smb2_remove_blocked_lock) and cancel_argv pointing to a file_lock. If a second SMB2_CANCEL arrives before release_async_work(), the cancel callback can run again on...