UBUNTU-CVE-2026-64378

In the Linux kernel, the following vulnerability has been resolved: writeback: fix race between cgroupwritebackumount and inodeswitchwbs When a container exits, the following BUGON is occasionally triggered: ================================================================== VFS: Busy inodes after...

UBUNTU-CVE-2026-64284

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Ensure vendor's exit handler runs before fastpath userspace exits Move the handling of fastpath userspace exits into vendor code to ensure KVM runs vendor specific operations that need to run before userspace gains...

UBUNTU-CVE-2026-64425

In the Linux kernel, the following vulnerability has been resolved: iouring/io-wq: re-check IOWQBITEXIT for each linked work item commit 10dc95939817 "iouring/io-wq: check IOWQBITEXIT inside work run loop" fixed the obvious case where ioworkerhandlework took one exit-bit snapshot before draining...

UBUNTU-CVE-2026-64416

In the Linux kernel, the following vulnerability has been resolved: mm: swapcgroup: fix NULL deref in lookupswapcgroupid on swapless host lookupswapcgroupid passes swapcgroupctrltype.map to swapcgroupidlookup without checking that the type was ever registered via swapcgroupswapon. On a swapless...

CVE-2026-64529 crypto: qat - remove unused character device and IOCTLs

In the Linux kernel, the following vulnerability has been resolved: crypto: qat - remove unused character device and IOCTLs The QAT driver exposes a character device qatadfctl with IOCTLs for device configuration, start, stop, status query and enumeration. These IOCTLs are not part of any public...

EUVD-2026-49037

In the Linux kernel, the following vulnerability has been resolved: xfrm: move policybydst RCU sync from per-netns .exit to .preexit The struct pernetoperations docstring in include/net/netnamespace.h explicitly warns against blocking RCU primitives in .exit handlers: Exit methods using blocking...

CVE-2026-64525

The CVE describes a Linux kernel xfrm policy_bydst RCU synchronization issue where xfrm_policy_fini() called synchronize_rcu() during namespace exit, causing long RCUs and heavy cleanup workload when many namespaces are torn down. The fix moves the policy flush and related workqueue drains into a...

CVE-2026-64525 xfrm: move policy_bydst RCU sync from per-netns .exit to .pre_exit

In the Linux kernel, the following vulnerability has been resolved: xfrm: move policybydst RCU sync from per-netns .exit to .preexit The struct pernetoperations docstring in include/net/netnamespace.h explicitly warns against blocking RCU primitives in .exit handlers: Exit methods using blocking...

CVE-2026-64525 xfrm: move policy_bydst RCU sync from per-netns .exit to .pre_exit

In the Linux kernel, the following vulnerability has been resolved: xfrm: move policybydst RCU sync from per-netns .exit to .preexit The struct pernetoperations docstring in include/net/netnamespace.h explicitly warns against blocking RCU primitives in .exit handlers: Exit methods using blocking...

CVE-2026-64525

In the Linux kernel, the following vulnerability has been resolved: xfrm: move policybydst RCU sync from per-netns .exit to .preexit The struct pernetoperations docstring in include/net/netnamespace.h explicitly warns against blocking RCU primitives in .exit handlers: Exit methods using blocking...

CVE-2026-64425 io_uring/io-wq: re-check IO_WQ_BIT_EXIT for each linked work item

In the Linux kernel, the following vulnerability has been resolved: iouring/io-wq: re-check IOWQBITEXIT for each linked work item commit 10dc95939817 "iouring/io-wq: check IOWQBITEXIT inside work run loop" fixed the obvious case where ioworkerhandlework took one exit-bit snapshot before draining...

EUVD-2026-48769

In the Linux kernel, the following vulnerability has been resolved: iouring/io-wq: re-check IOWQBITEXIT for each linked work item commit 10dc95939817 "iouring/io-wq: check IOWQBITEXIT inside work run loop" fixed the obvious case where ioworkerhandlework took one exit-bit snapshot before draining...

CVE-2026-64425

CVE-2026-64425 affects the Linux kernel's io_uring/io-wq subsystem. A prior fix introduced a check for IO_WQ_BIT_EXIT in the outer work run loop, but it still snapshots the exit bit once before processing an entire dependent linked-work chain. If io_wq_exit_start() sets the bit after the first li...

CVE-2026-64416

CVE-2026-64416 is a NULL pointer dereference in the Linux kernel's mm: swap_cgroup subsystem. lookup_swap_cgroup_id() passes swap_cgroup_ctrl[type].map to __swap_cgroup_id_lookup() without verifying the swap type was registered; on a swapless host , every ctrl->map is NULL, causing a crash. Th...

EUVD-2026-48922

In the Linux kernel, the following vulnerability has been resolved: writeback: fix race between cgroupwritebackumount and inodeswitchwbs When a container exits, the following BUGON is occasionally triggered: ================================================================== VFS: Busy inodes after...

CVE-2026-64378 writeback: fix race between cgroup_writeback_umount() and inode_switch_wbs()

In the Linux kernel, the following vulnerability has been resolved: writeback: fix race between cgroupwritebackumount and inodeswitchwbs When a container exits, the following BUGON is occasionally triggered: ================================================================== VFS: Busy inodes after...

CVE-2026-64378 writeback: fix race between cgroup_writeback_umount() and inode_switch_wbs()

In the Linux kernel, the following vulnerability has been resolved: writeback: fix race between cgroupwritebackumount and inodeswitchwbs When a container exits, the following BUGON is occasionally triggered: ================================================================== VFS: Busy inodes after...

EUVD-2026-48996

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Ensure vendor's exit handler runs before fastpath userspace exits Move the handling of fastpath userspace exits into vendor code to ensure KVM runs vendor specific operations that need to run before userspace gains...

CVE-2026-64284

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Ensure vendor's exit handler runs before fastpath userspace exits Move the handling of fastpath userspace exits into vendor code to ensure KVM runs vendor specific operations that need to run before userspace gains...

CVE-2026-64284 KVM: x86: Ensure vendor's exit handler runs before fastpath userspace exits

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Ensure vendor's exit handler runs before fastpath userspace exits Move the handling of fastpath userspace exits into vendor code to ensure KVM runs vendor specific operations that need to run before userspace gains...