What’s Vulnerable › Vulnerabilities

CVE-2026-89833: f2fs: fix to avoid potential deadloop in f2fs_fsync_node_pages()

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-16 · updated 2026-10-30

Description

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 products

• Linux: 4.7 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/161513f53e4ac90fd356433bdf8e31e6adeb92af
• https://git.kernel.org/stable/c/58ca9f06480457eb9c9513e1ae2b75316d4ed1e5
• https://git.kernel.org/stable/c/64a47dc8286ff98d8c231ae035bdfe16be1b93bf
• https://git.kernel.org/stable/c/905411f6504876d268ba8dafc8e75367782da4b7
• https://git.kernel.org/stable/c/bdc06381d590ad5833ee7a2c56b8b685d80ee9b5
• https://git.kernel.org/stable/c/ce366bfa821ec81dd45bde547ee31e659306cc61

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