fisy-fuzz

FIle SYstem - FUZZer This is the full file system fuzzing framework that I presented at the Hack in the Box 2020 Lockdown Edition conference in April. Conference Talk Conference Talk Single Video Conference Material Goal The goal of this framework is to uncover kernel security bugs on UNIX system...

Linux Distros Unpatched Vulnerability : CVE-2025-70290

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - An issue was discovered in Denx U-Boot before 2026.04. An integer overflow vulnerability in the ZFS filesystem support can be triggered by malformed on-disk...

CVE-2025-70290

An issue was discovered in Denx U-Boot before 2026.04. An integer overflow vulnerability in the ZFS filesystem support can be triggered by malformed on-disk metadata. The issue may result in incorrect memory allocation followed by out-of-bounds memory access, potentially leading to a crash or...

DEBIAN-CVE-2025-70290

An issue was discovered in Denx U-Boot before 2026.04. An integer overflow vulnerability in the ZFS filesystem support can be triggered by malformed on-disk metadata. The issue may result in incorrect memory allocation followed by out-of-bounds memory access, potentially leading to a crash or...

CVE-2025-70290

CVE-2025-70290 affects Denx U-Boot before 2026.04 . An integer overflow in the ZFS filesystem support can be triggered by malformed on-disk metadata , leading to incorrect memory allocation and subsequent out-of-bounds memory access . This may result in a crash or arbitrary code execution during ...

CVE-2026-79619: Incorrect Authorization

On Linux, several OpenZFS ioctl authorization checks accept a capability held only within a user-created, unprivileged namespace as equivalent to real host privilege, allowing an unprivileged local user to perform operations that should require root. Affected operations include pool-administrativ...

CVE-2025-70290

An issue was discovered in Denx U-Boot before 2026.04. An integer overflow vulnerability in the ZFS filesystem support can be triggered by malformed on-disk metadata. The issue may result in incorrect memory allocation followed by out-of-bounds memory access, potentially leading to a crash or...

CVE-2025-70290

An issue was discovered in Denx U-Boot before 2026.04. An integer overflow vulnerability in the ZFS filesystem support can be triggered by malformed on-disk metadata. The issue may result in incorrect memory allocation followed by out-of-bounds memory access, potentially leading to a crash or...

EUVD-2025-210793

An issue was discovered in Denx U-Boot before 2026.04. An integer overflow vulnerability in the ZFS filesystem support can be triggered by malformed on-disk metadata. The issue may result in incorrect memory allocation followed by out-of-bounds memory access, potentially leading to a crash or...

PT-2026-82240

Name of the Vulnerable Software and Affected Versions Denx U-Boot versions prior to 2026.04 Description An integer overflow exists in the ZFS filesystem support, which can be triggered by malformed on-disk metadata. This flaw may lead to incorrect memory allocation and subsequent out-of-bounds...

CVE-2025-70290: Integer Overflow or Wraparound

An issue was discovered in Denx U-Boot before 2026.04. An integer overflow vulnerability in the ZFS filesystem support can be triggered by malformed on-disk metadata. The issue may result in incorrect memory allocation followed by out-of-bounds memory access, potentially leading to a crash or...

CVE-2026-49431

The ZFSIOCSETPROP ioctl, used by zfs-set8, incorrectly validated the calling user such that an unprivileged user is able to set metadata on a dataset indicating that the dataset has received properties from a zfs-recv8 stream. Any local user can set the internal ZFS metadata flag "$hasrecvd" on...

CVE-2026-49429

The ZFSIOCUSERSPACEMANY ioctl, used by zfs-userspace8, truncated a 64-bit output buffer size to a 32-bit integer for the kernel allocation, but used the original 64-bit size as the buffer limit when writing records. A local user with the "userused" delegated ZFS permission can trigger a kernel he...

CVE-2026-49430

The ZFSIOCRECVNEW ioctl, in the heal receive path, similarly truncated a 64-bit payload size to a 32-bit integer for allocation, then used the original 64-bit size as the length for a byteswap operation. A local user with the "receive" delegated ZFS permission can trigger kernel memory corruption...

EUVD-2026-62241

The ZFSIOCSETPROP ioctl, used by zfs-set8, incorrectly validated the calling user such that an unprivileged user is able to set metadata on a dataset indicating that the dataset has received properties from a zfs-recv8 stream. Any local user can set the internal ZFS metadata flag "$hasrecvd" on...

CVE-2026-49431

CVE-2026-49431 is an access control flaw in the OpenZFS component of FreeBSD (all supported versions). The ZFS_IOC_SET_PROP ioctl, used by zfs-set(8), incorrectly validated the calling user, allowing any unprivileged local user to set the internal ZFS metadata flag $hasrecvd on a dataset, falsely...

CVE-2026-49431 Incorrect user validation in ZFS_IOC_SET_PROP ioctl

The ZFSIOCSETPROP ioctl, used by zfs-set8, incorrectly validated the calling user such that an unprivileged user is able to set metadata on a dataset indicating that the dataset has received properties from a zfs-recv8 stream. Any local user can set the internal ZFS metadata flag "$hasrecvd" on...

CVE-2026-49430 Kernel heap overflow in ZFS_IOC_RECV_NEW ioctl

The ZFSIOCRECVNEW ioctl, in the heal receive path, similarly truncated a 64-bit payload size to a 32-bit integer for allocation, then used the original 64-bit size as the length for a byteswap operation. A local user with the "receive" delegated ZFS permission can trigger kernel memory corruption...

EUVD-2026-62240

The ZFSIOCRECVNEW ioctl, in the heal receive path, similarly truncated a 64-bit payload size to a 32-bit integer for allocation, then used the original 64-bit size as the length for a byteswap operation. A local user with the "receive" delegated ZFS permission can trigger kernel memory corruption...

CVE-2026-49430

CVE-2026-49430 is a kernel memory corruption vulnerability in the OpenZFS component of FreeBSD , specifically in the ZFS_IOC_RECV_NEW ioctl within the heal receive path. The root cause is an integer truncation : a 64-bit payload size is truncated to 32 bits for buffer allocation, but the original...