freebsd-dirent-info-leak-bugs

我是如何发现这些漏洞的？ 1. 随机决定审计 FreeBSD 中的文件系统 2. 做一些研究，发现默认使用的文件系统是 FFS 和 UFS 的组合 3. 花一些时间审计 ufscreate，发现 0 个漏洞 4. 前往此处查看 UFS 文件系统函数的提交历史 5. 发现这个关于通过栈上分配的 struct dirent 对象中的填充字节泄露信息的提交 6. 分析该补丁，发现对 msdosfsreaddir 的补丁不完整。他们修补了一个实例，但没有修补第二个。 7. 编写 PoC 确认我可以泄露 3 个填充字节。然后开始寻找变种。 8. 在 mqueuefs、autofs、smbfs 和...

CVE-2026-38636

An issue in the seekdir function /dirent/mod.rs of relibc commit 61f42d allows attackers to cause a Denial of Service DoS via a crafted input...

EUVD-2026-67770

An issue in the seekdir function /dirent/mod.rs of relibc commit 61f42d allows attackers to cause a Denial of Service DoS via a crafted input...

CVE-2026-38636

An issue in the seekdir function /dirent/mod.rs of relibc commit 61f42d allows attackers to cause a Denial of Service DoS via a crafted input...

CVE-2026-38636

A Denial of Service vulnerability exists in the seekdir() function within /dirent/mod.rs of relibc (Redox OS's standard C library), specifically at commit 61f42d. A remote attacker can trigger a DoS by supplying a crafted input, with no privileges or user interaction required (CVSS 7.5 HIGH , vec...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15, Linux-6.1

In the Linux kernel, the following vulnerabilities have been resolved: f2fs: fixed to avoid dirent corruption As Al reported in link 1: f2fsrename … if olddir != newdir && !whiteout f2fssetlinkoldinode, olddirentry, olddirpage, newdir; else f2fsputpageolddirpage, 0; You need the correct inumber i...

CVE-2026-46078

In the Linux kernel, the following vulnerability has been resolved: erofs: fix the out-of-bounds nameoff handling for trailing dirents Currently we already have boundary-checks for nameoffs, but the trailing dirents are special since the namelens are calculated with strnlen with unchecked nameoff...

CVE-2026-46078

Summary: CVE-2026-46078 affects the Linux kernel EROFS filesystem, where trailing dirents can trigger an out-of-bounds read due to incorrect nameoff handling. The root cause is that namelen calculations for trailing dirents use strnlen with unchecked nameoffs, allowing underflow when nameoff >...

CVE-2026-46078 erofs: fix the out-of-bounds nameoff handling for trailing dirents

In the Linux kernel, the following vulnerability has been resolved: erofs: fix the out-of-bounds nameoff handling for trailing dirents Currently we already have boundary-checks for nameoffs, but the trailing dirents are special since the namelens are calculated with strnlen with unchecked nameoff...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: configfs: A possible memory leak has been fixed in configfscreatedir. kmemleak: Memory leaks were reported in configfscreatedir. - Unreferenced object 0xffff888009f6af00 size 192: Command: “modprobe”, PID: 3777, Jiffies:...

CVE-2026-34962

barebox version prior to 2026.04.0 contains a denial-of-service vulnerability in ext4 directory parsing in fs/ext4/ext4common.c where the ext4fsiteratedir function fails to validate that directory entry length values are non-zero. Attackers can supply a malicious ext4 filesystem image with a...

Linux kernel fuse_add_dirent_to_cache function buffer overflow vulnerability

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A buffer overflow vulnerability exists in the Linux kernel. The vulnerability stems from the fuseadddirenttocache function not checking if the dirent size exceeds PAGESIZE, whi...

SUSE CVE-2026-31694

In the Linux kernel, the following vulnerability has been resolved: fuse: reject oversized dirents in page cache fuseadddirenttocache computes a serialized dirent size from the server-controlled namelen field and copies the dirent into a single page-cache page. The existing logic only checks...

CVE-2026-31694

A flaw was found in the Linux kernel's Filesystem in Userspace FUSE component. A malicious FUSE server could exploit this by providing an oversized directory entry dirent that is not properly validated. This improper validation causes a memory copy operation to write beyond the allocated buffer,...

CVE-2026-31694

In the Linux kernel, the following vulnerability has been resolved: fuse: reject oversized dirents in page cache fuseadddirenttocache computes a serialized dirent size from the server-controlled namelen field and copies the dirent into a single page-cache page. The existing logic only checks...

CVE-2026-31694 fuse: reject oversized dirents in page cache

In the Linux kernel, the following vulnerability has been resolved: fuse: reject oversized dirents in page cache fuseadddirenttocache computes a serialized dirent size from the server-controlled namelen field and copies the dirent into a single page-cache page. The existing logic only checks...

EUVD-2026-26503

In the Linux kernel, the following vulnerability has been resolved: fuse: reject oversized dirents in page cache fuseadddirenttocache computes a serialized dirent size from the server-controlled namelen field and copies the dirent into a single page-cache page. The existing logic only checks...

Linux kernel 安全漏洞

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A buffer overflow vulnerability exists in the Linux kernel. The vulnerability stems from the fuseadddirenttocache function not checking if the dirent size exceeds PAGESIZE, whi...

Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-011164)

"The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-011164 advisory. In the Linux kernel, the following vulnerability has been resolved: configfs: fix possible memory leak in configfscreatedir kmemleak reported memory leaks in...

kernel: smb: client: Fix use-after-free in cifs_fill_dirent

A use-after-free flaw was found in cifsfilldirent in fs/cifs/readdir.c in smb client in the Linux Kernel. This flaw could allow an attacker to crash the system due to race problem. This vulnerability could even lead to a kernel information leak problem...