VulnerabilityPublished 16 Sep 2026Updated 21 Oct 2026

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

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in ce366bfa821ec81dd45bde547ee31e659306cc61 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:47 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in ce366bfa821ec81dd45bde547ee31e659306cc61, bdc06381d590ad5833ee7a2c56b8b685d80ee9b5, 905411f6504876d268ba8dafc8e75367782da4b7 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 16 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 608514deba38c8611ad330d6a3c8e2b9a1f68e4b, < ce366bfa821ec81dd45bde547ee31e659306cc61	Fixed in ce366bfa821ec81dd45bde547ee31e659306cc61
LinuxLinux	Affected ≥ 608514deba38c8611ad330d6a3c8e2b9a1f68e4b, < bdc06381d590ad5833ee7a2c56b8b685d80ee9b5	Fixed in bdc06381d590ad5833ee7a2c56b8b685d80ee9b5
LinuxLinux	Affected ≥ 608514deba38c8611ad330d6a3c8e2b9a1f68e4b, < 905411f6504876d268ba8dafc8e75367782da4b7	Fixed in 905411f6504876d268ba8dafc8e75367782da4b7
LinuxLinux	Affected ≥ 608514deba38c8611ad330d6a3c8e2b9a1f68e4b, < 161513f53e4ac90fd356433bdf8e31e6adeb92af	Fixed in 161513f53e4ac90fd356433bdf8e31e6adeb92af
LinuxLinux	Affected ≥ 608514deba38c8611ad330d6a3c8e2b9a1f68e4b, < 58ca9f06480457eb9c9513e1ae2b75316d4ed1e5	Fixed in 58ca9f06480457eb9c9513e1ae2b75316d4ed1e5
LinuxLinux	Affected =4.7	Fixed in–

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

References

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