Linux Kernel Security Vulnerabilities

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in the Linux kernel that stems from a failure to release dentry when allocating an inode fails, which could lead to a memory leak...

UBUNTU-CVE-2025-21887

In the Linux kernel, the following vulnerability has been resolved: ovl: fix UAF in ovldentryupdatereval by moving dput in ovllinkup The issue was caused by dputupper being called before ovldentryupdatereval, while upper-dflags was still accessed in ovldentryremote. Move dputupper after its last...

Linux Kernel Resource Management Vulnerability

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. Linux kernel suffers from a resource management error vulnerability that stems from ovl releasing the upper dentry prematurely, which could lead to reuse after release...

CVE-2022-49281 cifs: fix handlecache and multiuser

In the Linux kernel, the following vulnerability has been resolved: cifs: fix handlecache and multiuser In multiuser each individual user has their own tcon structure for the share and thus their own handle for a cached directory. When we umount such a share we much make sure to release the pinne...

Linux 9p File System Privilege Escalation

The vulnerability of the v9fsdentryrelease function in the fs/9p/vfsdentry.c file of the 9p file system in the Linux operating system is related to the use of memory after it is released. Exploiting this vulnerability can allow an attacker to increase their privileges...

CVE-2024-39463

In the Linux kernel, the following vulnerability has been resolved: 9p: add missing locking around taking dentry fid list Fix a use-after-free on dentry's dfsdata fid list when a thread looks up a fid through dentry while another thread unlinks it: UAF thread: refcountt: addition on 0;...