UBUNTU-CVE-2026-23157

In the Linux kernel, the following vulnerability has been resolved: btrfs: do not strictly require dirty metadata threshold for metadata writepages BUG There is an internal report that over 1000 processes are waiting at the ioscheduletimeout of balancedirtypages, causing a system hang and trigger...

CVE-2026-23157

CVE-2026-23157 is a Linux kernel vulnerability affecting the btrfs metadata writeback path. The issue occurs in the balance between dirty pages and a cgroup/global dirty limit, where an internal 32 MiB threshold for btrfs btree inode writeback prevents progress when the cgroup’s dirty pages excee...

CVE-2025-39779 btrfs: subpage: keep TOWRITE tag until folio is cleaned

In the Linux kernel, the following vulnerability has been resolved: btrfs: subpage: keep TOWRITE tag until folio is cleaned btrfssubpagesetwriteback calls foliostartwriteback the first time a folio is written back, and it also clears the PAGECACHETAGTOWRITE tag even if there are still dirty block...