CVE-2026-80549 s390/vfio_ccw: Move cp cleanup out of not operational

In the Linux kernel, the following vulnerability has been resolved: s390/vfioccw: Move cp cleanup out of not operational The fsmnotoper routine is called when the device has been lost, and is by definition no longer operational. Since this can happen asynchronously from the normal behavior of the...

CVE-2026-80549

In the Linux kernel, the following vulnerability has been resolved: s390/vfioccw: Move cp cleanup out of not operational The fsmnotoper routine is called when the device has been lost, and is by definition no longer operational. Since this can happen asynchronously from the normal behavior of the...

CVE-2026-80550 s390/vfio_ccw: Fix out of bounds check on CCW array

In the Linux kernel, the following vulnerability has been resolved: s390/vfioccw: Fix out of bounds check on CCW array The routine ccwchaincalclength counts the number of channel command words CCWs that are chained together in a single channel program, and rejects anything larger than...

CVE-2026-80549 s390/vfio_ccw: Move cp cleanup out of not operational

In the Linux kernel, the following vulnerability has been resolved: s390/vfioccw: Move cp cleanup out of not operational The fsmnotoper routine is called when the device has been lost, and is by definition no longer operational. Since this can happen asynchronously from the normal behavior of the...

CVE-2026-80550 s390/vfio_ccw: Fix out of bounds check on CCW array

In the Linux kernel, the following vulnerability has been resolved: s390/vfioccw: Fix out of bounds check on CCW array The routine ccwchaincalclength counts the number of channel command words CCWs that are chained together in a single channel program, and rejects anything larger than...

CVE-2026-80550

CVE-2026-80550 is an out-of-bounds read in the Linux kernel s390/vfio_ccw driver. The function ccwchain_calc_length() iterates over chained channel command words (CCWs) with a do..while (count

CVE-2026-80549

This CVE affects the s390/vfio_ccw driver in the Linux kernel. The fsm_notoper() routine is invoked when a channel-attached device is lost; because this can occur asynchronously, the cleanup of private->cp resources may execute while other locks (notably the cio subchannel lock ) are held in t...

CVE-2026-80548

CVE-2026-80548 affects the Linux kernel s390/vfio_ccw subsystem, where the io_mutex lock had a scope too narrow to fully serialize I/O operations, leaving residual race conditions on I/O resources. The fix expands the lock's scope to close these windows and also reworks how cp_free() is invoked f...

CVE-2026-80547 s390/vfio_ccw: Implement a crw lock

In the Linux kernel, the following vulnerability has been resolved: s390/vfioccw: Implement a crw lock Unlike the channelprogram struct, which covers synchronous I/O submissions and asynchronous interrupts, the CRW region relies exclusively on asynchronous events coming from hardware. Implement a...

CVE-2026-80548 s390/vfio_ccw: Selectively expand io_mutex

In the Linux kernel, the following vulnerability has been resolved: s390/vfioccw: Selectively expand iomutex The iomutex was defined to serialize the ioregions, but then has also sort of been associated with the I/O themselves because of the close relationship they share. With the handful of race...

CVE-2026-80547

This vulnerability affects the Linux kernel 's s390/vfio_ccw subsystem (Virtual Function Interface for Channel-Word devices on the s390 architecture). The root cause is a missing lock on the CRW (Control Region Word) region, which handles asynchronous hardware events; without it, the list of payl...

CVE-2026-80547 s390/vfio_ccw: Implement a crw lock

In the Linux kernel, the following vulnerability has been resolved: s390/vfioccw: Implement a crw lock Unlike the channelprogram struct, which covers synchronous I/O submissions and asynchronous interrupts, the CRW region relies exclusively on asynchronous events coming from hardware. Implement a...

CVE-2026-80548 s390/vfio_ccw: Selectively expand io_mutex

In the Linux kernel, the following vulnerability has been resolved: s390/vfioccw: Selectively expand iomutex The iomutex was defined to serialize the ioregions, but then has also sort of been associated with the I/O themselves because of the close relationship they share. With the handful of race...

Linux Distros Unpatched Vulnerability : CVE-2026-80553

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - s390/vfioccw: Cancel existing workqueues The initialization of the iowork and crwwork workqueues begs the question of whether they should be un-initialized. Add...

Linux Distros Unpatched Vulnerability : CVE-2026-80552

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - s390/vfioccw: Ensure index for read/write regions are within range The introduction of the capability chain rightly clamped the region indexes to the range of t...

Linux Distros Unpatched Vulnerability : CVE-2026-80550

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - s390/vfioccw: Fix out of bounds check on CCW array The routine ccwchaincalclength counts the number of channel command words CCWs that are chained together in a...

Linux Distros Unpatched Vulnerability : CVE-2026-80547

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - s390/vfioccw: Implement a crw lock Unlike the channelprogram struct, which covers synchronous I/O submissions and asynchronous interrupts, the CRW region relies...

Linux Distros Unpatched Vulnerability : CVE-2026-80551

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - s390/vfioccw: Ensure first IDAW remains constant The first IDAW in a list does not need to be on a 2K/4K boundary like all others, and so is read separately to...

Linux Distros Unpatched Vulnerability : CVE-2026-80555

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - s390/vfioccw: Free all memory if cpinit fails The routine cpfree is called to unpin/free any memory once an I/O is completed successfully, or if cpprefetch fail...

Linux Distros Unpatched Vulnerability : CVE-2026-80549

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - s390/vfioccw: Move cp cleanup out of not operational The fsmnotoper routine is called when the device has been lost, and is by definition no longer operational...