vulns-2026-fatfs-chance

ELM FatFs Vulnerability Research This repository documents six confirmed security vulnerabilities in FatFs along with a test harness, fuzzer, and standalone exploit disk-image generator. The original FatFs source code can be found in the FatFs-R0.16 directory. This project is a return to a securi...

CVE-2026-69619

Out-of-bounds read in Windows exFAT File System allows an authorized attacker to elevate privileges over a network...

EUVD-2026-73566

Out-of-bounds read in Windows exFAT File System allows an authorized attacker to elevate privileges over a network...

CVE-2026-69619

CVE-2026-69619 is an out-of-bounds read in the Windows exFAT File System that allows an authorized attacker to elevate privileges over a network . The CVSS 3.1 base score is 8.0 (HIGH) with a vector of AV:N/AC:L/PR:L/UI:R, requiring low privileges and user interaction, with high impact on confide...

Windows exFAT File System Elevation of Privilege Vulnerability

Out-of-bounds read in Windows exFAT File System allows an authorized attacker to elevate privileges over a network...

PT-2026-87621

w00t! Microsoft Patch Tuesday included my CVE-2026-69619. https://t.co/a5Rwpo3N0d infosec https://t.co/wVdqMCmSvR...

kernel: exfat: fix potential use-after-free in exfat_find_dir_entry()

A flaw was found in the Linux kernel's exFAT filesystem driver. A local attacker could exploit a use-after-free vulnerability in the exfatfinddirentry function. This occurs because a buffer is prematurely released while still being referenced, which can be triggered by processing a specially...

kernel: exfat: fix potential use-after-free in exfat_find_dir_entry()

A flaw was found in the Linux kernel's exFAT filesystem driver. A local attacker could exploit a use-after-free vulnerability in the exfatfinddirentry function. This occurs because a buffer is prematurely released while still being referenced, which can be triggered by processing a specially...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: exfat: Use kvmallocarray/kvfree instead of kmallocarray/kfree. The call stack shown below represents a scenario in the Linux 4.19 kernel. Memory allocation failed for the exfat file system, due to system memory fragmentation...

Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: exfat: fixed a potential deadlock in exfatgetdentryset When accessing a file with more entries than ESMAXENTRYNUM, the bh-array is allocated in exfatgetdentryset. The issue arises from the fact that the bh-array is allocated usin...

Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: exfat: Fixed a double-free operation in the delayedfree function. The double-free could occur at the following paths: c exfatcreateupcasetable exfatcreateupcasetable : Return error exfatfreeupcasetable : Free -volutbl...

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

A flaw was discovered in the exFAT driver of the Linux kernel. The vulnerability resides in the implementation of the file name reconstruction function, which is responsible for reading file name entries from a directory index and merging file name parts belonging to one file into a single long...

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

In the Linux kernel, the following vulnerability has been resolved: exfat: Fixed the infinite loop in exfatreaddir. If the file system is corrupted in such a way that a cluster links itself to another cluster in the cluster chain, and there is an unused directory entry in the cluster, the variabl...

Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: exfat: Check if the cluster number is valid. Syzbot reported a slab-out-of-bounds read in exfatclearbitmap. This issue was triggered when the reproducer called truncute with a size of 0, resulting in the following error messag...

K000162950: Multiple Linux kernel vulnerabilities

Security Advisory Description CVE-2026-63808 In the Linux kernel, the following vulnerability has been resolved: exfat: fix potential use-after-free in exfatfinddirentry In exfatfinddirentry, the bufferhead obtained from exfatgetdentry is released with brelsebh before the fall-through TYPEEXTEND...

Unity Linux 20.1050e Security Update: kernel (UTSA-2026-100148)

"The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-100148 advisory. In the Linux kernel, the following vulnerability has been resolved: exfat: fix potential use-after-free in exfatfinddirentry In exfatfinddirentry, the bufferhead...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-100495)

"The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-100495 advisory. In the Linux kernel, the following vulnerability has been resolved: exfat: bound uniname advance in exfatfinddirentry In exfatfinddirentry, each TYPEEXTEND file nam...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-100574)

"The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-100574 advisory. In the Linux kernel, the following vulnerability has been resolved: exfat: fix potential use-after-free in exfatfinddirentry In exfatfinddirentry, the bufferhead...

CVE-2026-64296

A flaw was found in the Linux kernel's exFAT filesystem driver. A local attacker could create a specially crafted directory with malformed name fragments. When the kernel processes this directory, an out-of-bounds read and write can occur, potentially leading to a denial of service or system...

SUSE CVE-2026-64296

In the Linux kernel, the following vulnerability has been resolved: exfat: bound uniname advance in exfatfinddirentry In exfatfinddirentry, each TYPEEXTEND file name entry advances the output pointer by a fixed amount while the loop guard only tracks the accumulated name length: if ++order == 2...