# f2fs: fix to avoid potential deadloop in f2fs_fsync_node_pages()

CVE record · `CVE-2026-89833`

- **Identifiers:** `CVE-2026-89833`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 16 Sept 2026
- **Updated:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 16 Sept 2026, 10:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Affected products, as the CNA wrote them

- Vendor: Linux. Product: Linux.
  - affected: `608514deba38c8611ad330d6a3c8e2b9a1f68e4b to before 64a47dc8286ff98d8c231ae035bdfe16be1b93bf` (git)
  - affected: `608514deba38c8611ad330d6a3c8e2b9a1f68e4b to before 58ca9f06480457eb9c9513e1ae2b75316d4ed1e5` (git)
  - affected: `608514deba38c8611ad330d6a3c8e2b9a1f68e4b to before bdc06381d590ad5833ee7a2c56b8b685d80ee9b5` (git)
  - affected: `608514deba38c8611ad330d6a3c8e2b9a1f68e4b to before 161513f53e4ac90fd356433bdf8e31e6adeb92af` (git)
  - affected: `608514deba38c8611ad330d6a3c8e2b9a1f68e4b to before 905411f6504876d268ba8dafc8e75367782da4b7` (git)
  - affected: `608514deba38c8611ad330d6a3c8e2b9a1f68e4b to before ce366bfa821ec81dd45bde547ee31e659306cc61` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.7`
  - unaffected: `before 4.7` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.114 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.51 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.5 to 7.2.*, inclusive` (semver)
  - unaffected: `7.3 to *, inclusive` (original_commit_for_fix)
  - Other versions: affected

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> The Linux kernel f2fs filesystem from 4.7 before the fixes can hang in an endless loop during fsync when a truncate runs at the same time. The source gives few details on who can trigger it. Upgrade to 6.1.191, 6.6.160, 6.12.114, 6.18.51, or a later release in those series.

Written 12 Nov 2026.

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

No source has published a CVSS score for this record yet.

- **CISA KEV:** Not listed.
- **EPSS:** 0.0023, the 13th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 16 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-89833](https://www.cve.org/CVERecord?id=CVE-2026-89833)
- [NVD: CVE-2026-89833](https://nvd.nist.gov/vuln/detail/CVE-2026-89833)

### References from the CNA

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

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2026-89833>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89833/>. Everything for agents: <https://agentprime.io/llms.txt>.