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

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: ffs: Remove WARNON from functionfsbind This commit addresses an issue related to a kernel panic that occurs when paniconwarn is enabled. The issue is caused by the unnecessary use of WARNON in functionfsbind, which c...

Linux Distros Unpatched Vulnerability : CVE-2026-89732

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - usb: gadget: ffs: Prevent deadlock during ep0 read loop Currently, ffsep0read holds ffs-mutex when it prepares to go to sleep waiting for an event. When no setu...

CVE-2026-89732

A flaw was found in the Linux kernel's USB FunctionFS ffs module. A local attacker could exploit a deadlock vulnerability in the ffsep0read function. This occurs when a userspace daemon polls ep0 and the USB gadget is simultaneously torn down, causing the kernel to enter an unresponsive state. Th...

DEBIAN-CVE-2026-89732

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: ffs: Prevent deadlock during ep0 read loop Currently, ffsep0read holds ffs-mutex when it prepares to go to sleep waiting for an event. When no setup events are pending, it calls waiteventinterruptibleexclusivelockedi...

AZL-100160 CVE-2026-89732 affecting package kernel 6.6.150.1-1

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: ffs: Prevent deadlock during ep0 read loop Currently, ffsep0read holds ffs-mutex when it prepares to go to sleep waiting for an event. When no setup events are pending, it calls waiteventinterruptibleexclusivelockedi...

CVE-2026-89732

CVE-2026-89732 is a deadlock in the Linux kernel 's USB gadget f_fs (function filesystem) subsystem. The root cause is that ffs_ep0_read() holds ffs->mutex while calling wait_event_interruptible_exclusive_locked_irq(), which sleeps without releasing the mutex. When a userspace daemon is pollin...

Astra Linux – Vulnerability found in Linux 5.15, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: ffs: Prevent race during ffsep0queuewait When performing fast composition switching, there is a possibility that the process of ffsep0write/ffsep0read may enter a race condition due to ep0req being freed from the...

CVE-2026-64594

The CVE affects the Linux kernel USB gadget subsystem (functionfs) and specifically f_fs. The bug occurs because ffs->reset_work is not initialized on all code paths; it is only initialized via INIT_WORK() in ffs_func_set_alt() and ffs_func_disable() under FFS_DEACTIVATED, and only after ffs_d...

CVE-2026-64594

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: ffs: initialize resetwork at allocation time ffsfskillsb unconditionally calls cancelworksync on ffs-resetwork when a functionfs instance is unmounted: ffsdataresetffs; cancelworksync&ffs-resetwork; However...

CVE-2026-64327

A flaw was found in the Linux kernel's FunctionFS ffs module, which handles USB gadget functionality. This vulnerability occurs because the endpoint direction epfile-in was not correctly initialized until a USB host connected. Consequently, early operations initiated by userspace programs could...

SUSE CVE-2026-64327

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: ffs: Initialize epfile-in early to fix endpoint direction checks When parsing endpoint descriptors, ffsdatagotdescs generates the epsaddrmap which contains the endpoint direction. However, epfile-in was previously on...

SUSE CVE-2026-64331

In the Linux kernel, the following vulnerability has been resolved: usbip: vudc: fix NULL deref in vepdequeue vepallocrequest wasn't initializing vrequest-udc, so cancellations on the FunctionFS AIO path were arriving in vepdequeue without a valid UDC reference. Since vrequest-udc is never actual...

CVE-2026-64331

In the Linux kernel, the following vulnerability has been resolved: usbip: vudc: fix NULL deref in vepdequeue vepallocrequest wasn't initializing vrequest-udc, so cancellations on the FunctionFS AIO path were arriving in vepdequeue without a valid UDC reference. Since vrequest-udc is never actual...

CVE-2026-64331

In the Linux kernel, the following vulnerability has been resolved: usbip: vudc: fix NULL deref in vepdequeue vepallocrequest wasn't initializing vrequest-udc, so cancellations on the FunctionFS AIO path were arriving in vepdequeue without a valid UDC reference. Since vrequest-udc is never actual...

UBUNTU-CVE-2026-64327

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: ffs: Initialize epfile-in early to fix endpoint direction checks When parsing endpoint descriptors, ffsdatagotdescs generates the epsaddrmap which contains the endpoint direction. However, epfile-in was previously on...

CVE-2026-64327

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: ffs: Initialize epfile-in early to fix endpoint direction checks When parsing endpoint descriptors, ffsdatagotdescs generates the epsaddrmap which contains the endpoint direction. However, epfile-in was previously on...

CVE-2026-64331

CVE-2026-64331 is a NULL pointer dereference in the Linux kernel's usbip vudc subsystem. The root cause is that vep_alloc_request() never initialized vrequest->udc, so when FunctionFS AIO cancellations arrived in vep_dequeue, a NULL UDC reference caused a kernel oops. The bug reportedly existe...

CVE-2026-64331 usbip: vudc: fix NULL deref in vep_dequeue()

In the Linux kernel, the following vulnerability has been resolved: usbip: vudc: fix NULL deref in vepdequeue vepallocrequest wasn't initializing vrequest-udc, so cancellations on the FunctionFS AIO path were arriving in vepdequeue without a valid UDC reference. Since vrequest-udc is never actual...

CVE-2026-64331 usbip: vudc: fix NULL deref in vep_dequeue()

In the Linux kernel, the following vulnerability has been resolved: usbip: vudc: fix NULL deref in vepdequeue vepallocrequest wasn't initializing vrequest-udc, so cancellations on the FunctionFS AIO path were arriving in vepdequeue without a valid UDC reference. Since vrequest-udc is never actual...

CVE-2026-64327

CVE-2026-64327 affects the Linux kernel USB gadget f_fs (FunctionFS) component. The root cause is that epfile->in was only initialized in ffs_func_eps_enable() (triggered on USB host connection), so early userspace ioctls such as FUNCTIONFS_DMABUF_ATTACH executed before host connection would o...