CVE-2026-80859

CVE-2026-80859 affects the Linux kernel FUSE (Filesystem in Userspace) subsystem. The root cause is a missing read memory barrier (smp_rmb()) in fuse_block_alloc(). The function reads fch->initialized followed by fch->io_uring, but lacks the barrier needed to pair with the smp_wmb() in fuse...

CVE-2026-80858

CVE-2026-80858 is a memory-ordering bug in the Linux kernel's FUSE (Filesystem in Userspace) io-uring path. The function fuse_uring_create_queue() publishes a newly initialized fuse_ring_queue pointer into ring->queues[qid] using WRITE_ONCE(), which does not guarantee that the queue's fields a...

CVE-2026-80858 fuse: publish io-uring queues with release semantics

In the Linux kernel, the following vulnerability has been resolved: fuse: publish io-uring queues with release semantics fuseuringcreatequeue initializes a fuseringqueue and then publishes the pointer into ring-queuesqid with WRITEONCE under the fch-lock. There are several readers that may...

EUVD-2026-71308

In the Linux kernel, the following vulnerability has been resolved: fuse: publish io-uring queues with release semantics fuseuringcreatequeue initializes a fuseringqueue and then publishes the pointer into ring-queuesqid with WRITEONCE under the fch-lock. There are several readers that may...

EUVD-2026-71307

In the Linux kernel, the following vulnerability has been resolved: fuse: wait for FRFINISHED on abortonkill to prevent use-after-free The abortonkill path in requestwaitanswer calls fuseabortconn and returns without waiting for FRFINISHED. If fusedevdowrite is concurrently processing the same...

CVE-2026-80857 fuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free

In the Linux kernel, the following vulnerability has been resolved: fuse: wait for FRFINISHED on abortonkill to prevent use-after-free The abortonkill path in requestwaitanswer calls fuseabortconn and returns without waiting for FRFINISHED. If fusedevdowrite is concurrently processing the same...

CVE-2026-80857

A use-after-free vulnerability exists in the Linux kernel's FUSE (Filesystem in Userspace) subsystem. In request_wait_answer(), the abort_on_kill path calls fuse_abort_conn() and returns without waiting for the FR_FINISHED flag. If fuse_dev_do_write() is concurrently processing the same request (...

EUVD-2026-71306

In the Linux kernel, the following vulnerability has been resolved: fuse: fix invalidate lock leak on setattr writeback failure fusedosetattr takes filemapinvalidatelock for a DAX truncate faultblocked = true and releases it at the out:/error: labels. But when a writeback flush is also needed, a...

CVE-2026-80856

In the Linux kernel, the following vulnerability has been resolved: fuse: fix invalidate lock leak on setattr writeback failure fusedosetattr takes filemapinvalidatelock for a DAX truncate faultblocked = true and releases it at the out:/error: labels. But when a writeback flush is also needed, a...

CVE-2026-80856

CVE-2026-80856 is a lock leak in the Linux kernel FUSE subsystem. In fuse_do_setattr(), the function acquires filemap_invalidate_lock() for a DAX truncate but fails to release it when write_inode_now() returns an error (e.g., the FUSE daemon returns -EIO ). The leaked rwsem causes any subsequent ...

CVE-2026-80856 fuse: fix invalidate lock leak on setattr writeback failure

In the Linux kernel, the following vulnerability has been resolved: fuse: fix invalidate lock leak on setattr writeback failure fusedosetattr takes filemapinvalidatelock for a DAX truncate faultblocked = true and releases it at the out:/error: labels. But when a writeback flush is also needed, a...

CVE-2026-80855 fuse: fix invalidate lock leak on open O_TRUNC DAX failure

In the Linux kernel, the following vulnerability has been resolved: fuse: fix invalidate lock leak on open OTRUNC DAX failure fuseopen takes filemapinvalidatelock for a DAX truncate daxtruncate = true and releases it before the outinodeunlock label. But when fusedaxbreaklayouts fails, the goto...

EUVD-2026-71305

In the Linux kernel, the following vulnerability has been resolved: fuse: fix invalidate lock leak on open OTRUNC DAX failure fuseopen takes filemapinvalidatelock for a DAX truncate daxtruncate = true and releases it before the outinodeunlock label. But when fusedaxbreaklayouts fails, the goto...

CVE-2026-80855

In the Linux kernel, the following vulnerability has been resolved: fuse: fix invalidate lock leak on open OTRUNC DAX failure fuseopen takes filemapinvalidatelock for a DAX truncate daxtruncate = true and releases it before the outinodeunlock label. But when fusedaxbreaklayouts fails, the goto...

CVE-2026-80855

CVE-2026-80855 affects the Linux kernel FUSE filesystem. In fuse_open(), when a DAX truncate (O_TRUNC) triggers filemap_invalidate_lock(), a subsequent failure in fuse_dax_break_layouts() (e.g., returning -ERESTARTSYS after a signal interrupts the wait for busy DAX pages to drain) causes the code...

CVE-2026-80854

CVE-2026-80854 affects the Linux kernel USB gadget f_tcm (TCM backend) driver. The root cause is a race condition : usbg_port_unlink() decrements tpg_port_count in the fabric_pre_unlink() callback, before core_dev_del_lun() finishes draining active se_lun references. If the last-LUN unlink overla...

CVE-2026-80854

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: ftcm: keep port count until LUN teardown completes tcmusbgdropnexus permits session removal once tpgportcount reaches zero. However, usbgportunlink currently decrements that count from the fabricpreunlink callback,...

EUVD-2026-71304

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: ftcm: keep port count until LUN teardown completes tcmusbgdropnexus permits session removal once tpgportcount reaches zero. However, usbgportunlink currently decrements that count from the fabricpreunlink callback,...

CVE-2026-80854 usb: gadget: f_tcm: keep port count until LUN teardown completes

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: ftcm: keep port count until LUN teardown completes tcmusbgdropnexus permits session removal once tpgportcount reaches zero. However, usbgportunlink currently decrements that count from the fabricpreunlink callback,...

CVE-2026-80853

CVE-2026-80853 affects the Linux kernel KVM subsystem on SNP-enabled hosts . When KVM performs {de,en}crypt operations for an SEV or SEV-ES guest, it used a sub-page allocation for its temporary buffer. On SNP platforms, pages written by firmware are temporarily transferred to Firmware ownership ...