CVE-2026-89841

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-09-16. A secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.8EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.8Exploit: None knownExposed services: Not assessed

No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.

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

f2fs: only redirty pinned folios in redirty_blocks

redirty_blocks() pins folios with read_cache_folio() and then walks the same range again with filemap_lock_folio() to redirty them and drop the references it took.

Commit 5951fee46bef ("f2fs: Use a folio in redirty_blocks()") changed the second pass to a do/while loop. If read_cache_folio() fails before anything is pinned, page_idx does not advance but the cleanup loop still runs once.

If readahead has already populated the failed folio in page cache, that extra iteration finds it and folio_put_refs(folio, 2) drops one reference too many. Later drop_caches or reclaim can then report "BUG: Bad page state".

Only redirty the range that was pinned successfully.

CVSS v3
7.8
EG Score
7.8HIGHhigh confidence
EG Risk
40
EG Risk 40/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.2%
EPSS %ILE
6th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 16, 2026

Last Modified

September 16, 2026

Advisory Details (3)

Auto-updated Sep 16, 2026
No patch confirmed yet.
generic

f2fs: only redirty pinned folios in redirty_blocks - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/89c65ec3c18903de763cf567c96ab3ef60e5f3b0
generic

f2fs: only redirty pinned folios in redirty_blocks - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/85171332742e741ccd6f401c69b6e0d698119e72
generic

f2fs: only redirty pinned folios in redirty_blocks - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/445e4a1e6025ecd5312e9a95c1b234192c976ca1

Vendor Advisories for CVE-2026-89841(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.2~rc7-1~exp1 (178 versions)
  • every version up to 7.2.6-1: fixed in 7.2.6-1
—

Data Freshness Timeline

(refreshed 27× in last 7d / 81× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-05 02:33 UTCEG score recompute
  2. 2026-10-05 02:33 UTCGHSA enrichment
  3. 2026-10-04 23:22 UTCEPSS rescore
  4. 2026-10-04 15:30 UTCGHSA enrichment
  5. 2026-10-04 04:27 UTCGHSA enrichment
  6. 2026-10-03 17:24 UTCGHSA enrichment
  7. 2026-10-03 06:21 UTCGHSA enrichment
  8. 2026-10-02 19:18 UTCEG score recompute
  9. 2026-10-02 19:18 UTCGHSA enrichment
  10. 2026-10-02 08:15 UTCGHSA enrichment
  11. 2026-10-01 21:10 UTCEG score recompute
  12. 2026-10-01 21:10 UTCGHSA enrichment
  13. 2026-10-01 19:51 UTCEPSS rescore
  14. 2026-10-01 10:07 UTCGHSA enrichment
  15. 2026-09-30 23:04 UTCEG score recompute
  16. 2026-09-30 23:04 UTCGHSA enrichment
  17. 2026-09-30 15:04 UTCEPSS rescore
  18. 2026-09-30 11:59 UTCGHSA enrichment
  19. 2026-09-30 00:55 UTCEG score recompute
  20. 2026-09-30 00:55 UTCGHSA enrichment
  21. 2026-09-29 13:47 UTCGHSA enrichment
  22. 2026-09-29 02:44 UTCEG score recompute
  23. 2026-09-29 02:44 UTCGHSA enrichment
  24. 2026-09-28 15:41 UTCEG score recompute
  25. 2026-09-28 15:41 UTCGHSA enrichment
Show 56 more
  1. 2026-09-28 13:52 UTCEPSS rescore
  2. 2026-09-28 13:52 UTCEPSS rescore
  3. 2026-09-28 04:38 UTCGHSA enrichment
  4. 2026-09-27 17:34 UTCEG score recompute
  5. 2026-09-27 17:34 UTCGHSA enrichment
  6. 2026-09-27 13:49 UTCEPSS rescore
  7. 2026-09-27 06:31 UTCGHSA enrichment
  8. 2026-09-26 19:18 UTCEG score recompute
  9. 2026-09-26 19:18 UTCGHSA enrichment
  10. 2026-09-26 15:59 UTCEPSS rescore
  11. 2026-09-26 08:15 UTCEG score recompute
  12. 2026-09-26 08:14 UTCGHSA enrichment
  13. 2026-09-25 21:08 UTCGHSA enrichment
  14. 2026-09-25 10:05 UTCGHSA enrichment
  15. 2026-09-24 23:01 UTCEG score recompute
  16. 2026-09-24 23:01 UTCGHSA enrichment
  17. 2026-09-24 14:04 UTCEPSS rescore
  18. 2026-09-24 11:27 UTCGHSA enrichment
  19. 2026-09-24 00:24 UTCEG score recompute
  20. 2026-09-24 00:24 UTCGHSA enrichment
  21. 2026-09-23 17:54 UTCEPSS rescore
  22. 2026-09-23 13:21 UTCGHSA enrichment
  23. 2026-09-23 02:15 UTCEG score recompute
  24. 2026-09-23 02:15 UTCGHSA enrichment
  25. 2026-09-22 16:01 UTCEPSS rescore
  26. 2026-09-22 15:11 UTCGHSA enrichment
  27. 2026-09-22 04:09 UTCEG score recompute
  28. 2026-09-22 04:08 UTCGHSA enrichment
  29. 2026-09-21 21:09 UTCEPSS rescore
  30. 2026-09-21 17:05 UTCGHSA enrichment
  31. 2026-09-21 06:02 UTCEG score recompute
  32. 2026-09-21 06:02 UTCGHSA enrichment
  33. 2026-09-20 20:16 UTCEPSS rescore
  34. 2026-09-20 18:59 UTCGHSA enrichment
  35. 2026-09-20 07:56 UTCGHSA enrichment
  36. 2026-09-19 20:49 UTCEG score recompute
  37. 2026-09-19 20:49 UTCGHSA enrichment
  38. 2026-09-19 09:45 UTCGHSA enrichment
  39. 2026-09-18 22:42 UTCEG score recompute
  40. 2026-09-18 22:42 UTCGHSA enrichment
  41. 2026-09-18 19:28 UTCEPSS rescore
  42. 2026-09-18 11:39 UTCGHSA enrichment
  43. 2026-09-18 00:36 UTCEG score recompute
  44. 2026-09-18 00:36 UTCGHSA enrichment
  45. 2026-09-17 19:32 UTCEPSS rescore
  46. 2026-09-17 13:33 UTCGHSA enrichment
  47. 2026-09-17 02:29 UTCEG score recompute
  48. 2026-09-17 02:28 UTCGHSA enrichment
  49. 2026-09-16 15:24 UTCEG score recompute
  50. 2026-09-16 15:24 UTCGHSA enrichment
  51. 2026-09-16 14:49 UTCEG score recompute▲ 7.80
  52. 2026-09-16 14:49 UTCGHSA enrichment
  53. 2026-09-16 14:45 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  54. 2026-09-16 11:21 UTCNVD update
  55. 2026-09-16 10:40 UTCEG score recompute
  56. 2026-09-16 10:36 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-89841?
CVE-2026-89841 is a high vulnerability published on September 16, 2026. In the Linux kernel, the following vulnerability has been resolved: f2fs: only redirty pinned folios in redirty_blocks redirtyblocks() pins folios with readcache_folio() and then walks the same range again with filemaplockfolio() to redirty them and drop the references it took. Commit 5951fee46bef…
When was CVE-2026-89841 disclosed?
CVE-2026-89841 was first published on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-89841 actively exploited?
CVE-2026-89841 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (6th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-89841?
CVE-2026-89841 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-89841?
No fix for CVE-2026-89841 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-89841 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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