CVE-2026-89833

Summary

In the Linux kernel, the following vulnerability has been resolved:

f2fs: fix to avoid potential deadloop in f2fs_fsync_node_pages()

There is potential deadloop in race condition:

Thread A Thread B

  • fsync
  • f2fs_do_sync_file
  • f2fs_fsync_node_pages
  • last_fsync_dnode - folio_get(last_folio) - f2fs_setattr - f2fs_truncate - f2fs_truncate_blocks - f2fs_do_truncate_blocks - f2fs_truncate_inode_blocks - truncate_dnode - truncate_node - invalidate_mapping_pages - folio->mapping = NULL
  • is_node_folio alwasy return false
  • atomic && !marked is always true, then goto retry

Affected Software

VendorProductVersion RangeStatus
LinuxLinux608514deba38c8611ad330d6a3c8e2b9a1f68e4b < 161513f53e4ac90fd356433bdf8e31e6adeb92afaffected
LinuxLinux608514deba38c8611ad330d6a3c8e2b9a1f68e4b < 905411f6504876d268ba8dafc8e75367782da4b7affected
LinuxLinux608514deba38c8611ad330d6a3c8e2b9a1f68e4b < ce366bfa821ec81dd45bde547ee31e659306cc61affected
LinuxLinux4.7affected
LinuxLinux0 < 4.7unaffected
LinuxLinux6.18.51 <= 6.18.*unaffected
LinuxLinux7.2.5 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References