CVE-2026-89967

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:

mm/migrate_device: avoid out-of-bounds writes for compound folios

migrate_device_range() and migrate_device_pfns() clear the entries following a compound folio so that the PFN arrays retain their page-granular representation.

If a compound folio extends beyond the end of the caller-provided range, the loops clear all following folio entries without limiting them to the number of slots remaining in the npages-sized array, causing an out-of-bounds write.

Do not proceed with a compound folio if its page-granular representation does not fit entirely in the remaining PFN array. If this happens, drop any reference and lock acquired for the folio, clear the remaining entries, and stop collecting.

Observed with a KASAN x86 QEMU kernel using the HMM migrate_anon_huge_zero selftest. Closing /dev/hmm_dmirror0 after migrating an anonymous huge page to device memory exercises:

dmirror_fops_release() -> dmirror_device_evict_chunk() -> migrate_device_range()

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
5th
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 (2)

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

mm/migrate_device: avoid out-of-bounds writes for compound folios - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/dc41e961a269f2ca4196e669d6d8e05480899cd4
generic

mm/migrate_device: avoid out-of-bounds writes for compound folios - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/99186b185c245f5987d7f8715d5504c8d8cc04a0

Vendor Advisories for CVE-2026-89967(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 25× in last 7d / 73× 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 00:48 UTCEG score recompute
  2. 2026-10-05 00:47 UTCGHSA enrichment
  3. 2026-10-04 23:22 UTCEPSS rescore
  4. 2026-10-04 11:48 UTCGHSA enrichment
  5. 2026-10-03 22:55 UTCEG score recompute
  6. 2026-10-03 22:55 UTCGHSA enrichment
  7. 2026-10-03 10:02 UTCGHSA enrichment
  8. 2026-10-02 20:43 UTCEG score recompute
  9. 2026-10-02 20:43 UTCGHSA enrichment
  10. 2026-10-02 07:49 UTCEG score recompute
  11. 2026-10-02 07:49 UTCGHSA enrichment
  12. 2026-10-01 19:51 UTCEPSS rescore
  13. 2026-10-01 18:53 UTCGHSA enrichment
  14. 2026-10-01 05:51 UTCGHSA enrichment
  15. 2026-09-30 16:58 UTCEG score recompute
  16. 2026-09-30 16:58 UTCGHSA enrichment
  17. 2026-09-30 15:04 UTCEPSS rescore
  18. 2026-09-30 03:57 UTCEG score recompute
  19. 2026-09-30 03:57 UTCGHSA enrichment
  20. 2026-09-29 15:04 UTCGHSA enrichment
  21. 2026-09-29 02:11 UTCEG score recompute
  22. 2026-09-29 02:11 UTCGHSA enrichment
  23. 2026-09-28 13:52 UTCEPSS rescore
  24. 2026-09-28 13:52 UTCEPSS rescore
  25. 2026-09-28 13:18 UTCGHSA enrichment
Show 48 more
  1. 2026-09-28 00:25 UTCEG score recompute
  2. 2026-09-28 00:25 UTCGHSA enrichment
  3. 2026-09-27 13:49 UTCEPSS rescore
  4. 2026-09-27 11:31 UTCGHSA enrichment
  5. 2026-09-26 22:15 UTCEG score recompute
  6. 2026-09-26 22:15 UTCGHSA enrichment
  7. 2026-09-26 15:59 UTCEPSS rescore
  8. 2026-09-26 09:22 UTCEG score recompute
  9. 2026-09-26 09:22 UTCGHSA enrichment
  10. 2026-09-25 20:29 UTCGHSA enrichment
  11. 2026-09-25 06:59 UTCGHSA enrichment
  12. 2026-09-24 18:06 UTCEG score recompute
  13. 2026-09-24 18:06 UTCGHSA enrichment
  14. 2026-09-24 14:04 UTCEPSS rescore
  15. 2026-09-24 04:58 UTCGHSA enrichment
  16. 2026-09-23 16:05 UTCGHSA enrichment
  17. 2026-09-23 03:12 UTCEG score recompute
  18. 2026-09-23 03:12 UTCGHSA enrichment
  19. 2026-09-22 16:01 UTCEPSS rescore
  20. 2026-09-22 14:18 UTCGHSA enrichment
  21. 2026-09-22 01:25 UTCEG score recompute
  22. 2026-09-22 01:25 UTCGHSA enrichment
  23. 2026-09-21 21:09 UTCEPSS rescore
  24. 2026-09-21 12:32 UTCGHSA enrichment
  25. 2026-09-20 23:39 UTCEG score recompute
  26. 2026-09-20 23:39 UTCGHSA enrichment
  27. 2026-09-20 20:16 UTCEPSS rescore
  28. 2026-09-20 10:46 UTCGHSA enrichment
  29. 2026-09-19 21:53 UTCEG score recompute
  30. 2026-09-19 21:53 UTCGHSA enrichment
  31. 2026-09-19 08:59 UTCGHSA enrichment
  32. 2026-09-18 20:06 UTCEG score recompute
  33. 2026-09-18 20:05 UTCGHSA enrichment
  34. 2026-09-18 19:28 UTCEPSS rescore
  35. 2026-09-18 07:12 UTCEG score recompute
  36. 2026-09-18 07:12 UTCGHSA enrichment
  37. 2026-09-17 19:32 UTCEPSS rescore
  38. 2026-09-17 18:19 UTCGHSA enrichment
  39. 2026-09-17 04:16 UTCEG score recompute
  40. 2026-09-17 04:16 UTCGHSA enrichment
  41. 2026-09-16 15:23 UTCEG score recompute
  42. 2026-09-16 15:23 UTCGHSA enrichment
  43. 2026-09-16 14:47 UTCEG score recompute▲ 7.80
  44. 2026-09-16 14:47 UTCGHSA enrichment
  45. 2026-09-16 14:45 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  46. 2026-09-16 11:21 UTCNVD update
  47. 2026-09-16 10:38 UTCEG score recompute
  48. 2026-09-16 10:36 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-89967?
CVE-2026-89967 is a high vulnerability published on September 16, 2026. In the Linux kernel, the following vulnerability has been resolved: mm/migrate_device: avoid out-of-bounds writes for compound folios migratedevicerange() and migratedevicepfns() clear the entries following a compound folio so that the PFN arrays retain their page-granular representation. If a…
When was CVE-2026-89967 disclosed?
CVE-2026-89967 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-2026-89967 actively exploited?
CVE-2026-89967 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (5th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-89967?
CVE-2026-89967 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-2026-89967?
No fix for CVE-2026-89967 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-2026-89967 are linked in the Vendor Advisories panel on this page.

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