CVE-2026-39461 select(2) file descriptor set overflow causes stack overflow

libcasper3 communicates with helper processes via UNIX domain sockets, and uses the select2 system call to wait for data to become available. However, it does not verify that its socket descriptor fits within select2's descriptor set size limit of FDSETSIZE 1024. An attacker able to cause an...

EUVD-2026-31256

A file descriptor can be closed while a thread is blocked in a poll2 or select2 call waiting for that descriptor. Because the blocked thread does not hold a reference to the underlying object, this closure may result in the object being freed while the thread remains blocked. In this situation, t...

CVE-2026-45251 Kernel use-after-free via file descriptor syscalls

A file descriptor can be closed while a thread is blocked in a poll2 or select2 call waiting for that descriptor. Because the blocked thread does not hold a reference to the underlying object, this closure may result in the object being freed while the thread remains blocked. In this situation, t...

CVE-2026-45251 Kernel use-after-free via file descriptor syscalls

A file descriptor can be closed while a thread is blocked in a poll2 or select2 call waiting for that descriptor. Because the blocked thread does not hold a reference to the underlying object, this closure may result in the object being freed while the thread remains blocked. In this situation, t...

CVE-2026-45251

The FreeBSD kernel contains a use-after-free vulnerability (CVE-2026-45251) caused by a resource management error. A file descriptor can be closed while a thread is blocked in a poll(2) or select(2) call. Because the blocked thread does not hold a reference to the underlying object, the kernel ma...

PT-2026-42397

Name of the Vulnerable Software and Affected Versions FreeBSD libcasper3 affected versions not specified Description libcasper3 communicates with helper processes via UNIX domain sockets and utilizes the select2 system call to wait for available data. The software fails to verify if the socket...

PT-2026-42400

Name of the Vulnerable Software and Affected Versions fusefs affected versions not specified Description When a fusefs file system implements extended attributes, the kernel may send a FUSE LISTXATTR message to the userspace daemon to retrieve the list of extended attributes for a file. The FUSE...

PT-2026-42812

Name of the Vulnerable Software and Affected Versions ImageMagick affected versions not specified Description A race condition in the magick -distribute-cache service allows a remote attacker to hijack a file descriptor within the server process. Recommendations At the moment, there is no...

FreeBSD 安全漏洞

FreeBSD is a Unix-like operating system developed by the FreeBSD Foundation. There is a security vulnerability in FreeBSD, which stems from the lack of verification that the socket descriptors are within the FDSETSIZE limit, potentially leading to stack corruption. If the target application runs...

FreeBSD 资源管理错误漏洞

FreeBSD is a Unix-like operating system developed by the FreeBSD Foundation. There is a resource management vulnerability in FreeBSD. This vulnerability arises from threads being blocked during poll or select calls when file descriptors are closed. The kernel fails to remove the blocked threads...

PT-2026-42399

Name of the Vulnerable Software and Affected Versions Linux Kernel affected versions not specified Description A use-after-free issue exists where a file descriptor can be closed while a thread is blocked in a poll2 or select2 call waiting for that descriptor. Since the blocked thread does not ho...

FreeBSD : FreeBSD -- Kernel use-after-free via file descriptor syscalls (ee21f41f-54b5-11f1-8d7a-bc241121aa0a)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the ee21f41f-54b5-11f1-8d7a-bc241121aa0a advisory. A file descriptor can be closed while a thread is blocked in a poll2 or select2 call waiting for that...

CVE-2026-46333: Local Root Privilege Escalation and Credential Disclosure in the Linux Kernel ptrace Path

The Qualys Threat Research Unit TRU has discovered and published the full advisory for CVE-2026-46333, a logic flaw in the Linux kernel's ptracemayaccess function that permits an unprivileged local user to disclose sensitive files and execute arbitrary commands as root on default installations of...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: rustbinder: Properly handles FDA objects of length zero. A bug has been fixed where an empty FDA fd array object with 0 fds could cause an out-of-bounds error. The previous implementation used skip == 0 to indicate “this is a...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: iio: Buffer: Fixed error handling related to files in IIOBUFFERGETFDIOCTL. If we fail to copy the newly created file descriptor to userland, we try to clean it up by returning the ‘fd’ and freeing the ‘ib’. The code uses...

Exploit for CVE-2026-46333

ptracemaydream CVE-2026-46333 Local privilege escalation e...

FreeBSD-SA-26:19.file

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-26:19.file Security Advisory The FreeBSD Project Topic: Kernel use-after-free via file descriptor syscalls Category: core Module: file Announced: 2026-05-20...

FreeBSD Security Advisory - FreeBSD-SA-26:19.file

FreeBSD Security Advisory - A file descriptor can be closed while a thread is blocked in a poll2 or select2 call waiting for that descriptor. Because the blocked thread does not hold a reference to the underlying object, this closure may result in the object being freed while the thread remains...

FreeBSD -- Kernel use-after-free via file descriptor syscalls

Problem Description: A file descriptor can be closed while a thread is blocked in a poll2 or select2 call waiting for that descriptor. Because the blocked thread does not hold a reference to the underlying object, this closure may result in the object being freed while the thread remains blocked...

CVE-2026-5804

An improper authentication vulnerability was discovered in the Motorola Factory Test component com.motorola.motocit. The application contained a reference to a writable file descriptor in external storage which could be used by third party apps running on the device to open a TCP server, exposing...