Threats Tagged 'cve-2025-40233'

A high-severity vulnerability (CVE-2025-40214) in the Linux kernel's Unix domain sockets subsystem was resolved by initializing scc_index in unix_add_edge(). This flaw could lead to privilege escalation on Container-Optimized OS nodes, affecting multiple Google Kubernetes Engine (GKE) cluster types except those using GKE Sandbox. Patch versions have been released for various Container-Optimized OS node pools and Ubuntu Linux kernel packages. Bare metal GDC software is not affected. Users are advised to update to the specified patched kernel versions and reboot to apply fixes.

A vulnerability in the Linux kernel's ocfs2 filesystem occurs due to stale extent map cache after moving or defragmenting extents. This stale cache causes a mismatch between cached extent flags and the actual flags on disk, triggering a kernel BUG_ON condition. The issue arises specifically when reflinked extents are moved or defragmented without invalidating the extent map cache. The vulnerability has been resolved by clearing the extent map cache after each extent move or defragment operation to ensure fresh data is read from disk.

In the Linux kernel, the following vulnerability has been resolved: ocfs2: clear extent cache after moving/defragmenting extents The extent map cache can become stale when extents are moved or defragmented, causing subsequent operations to see outdated extent flags. This triggers a BUG_ON in ocfs2_refcount_cal_cow_clusters(). The problem occurs when: 1. copy_file_range() creates a reflinked extent with OCFS2_EXT_REFCOUNTED 2. ioctl(FITRIM) triggers ocfs2_move_extents() 3. __ocfs2_move_extents_range() reads and caches the extent (flags=0x2) 4. ocfs2_move_extent()/ocfs2_defrag_extent() calls __ocfs2_move_extent() which clears OCFS2_EXT_REFCOUNTED flag on disk (flags=0x0) 5. The extent map cache is not invalidated after the move 6. Later write() operations read stale cached flags (0x2) but disk has updated flags (0x0), causing a mismatch 7. BUG_ON(!(rec->e_flags & OCFS2_EXT_REFCOUNTED)) triggers Fix by clearing the extent map cache after each extent move/defrag operation in __ocfs2_move_extents_range(). This ensures subsequent operations read fresh extent data from disk.