CVE-2026-53039

CVE-2026-53039 concerns the Linux kernel OCFS2 code where OCFS2_IOC_GROUP_ADD could trigger a BUG_ON in ocfs2_set_new_buffer_uptodate due to validating the group input too late. The root cause is user-controlled group block being cached before ocfs2_verify_group_and_input() validates it, and impr...