CVE-2026-80685

HIGHPre-NVD 7.17.1—
EchelonGraph scoreHIGH confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-08-28. a secondary CVSS source baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this week
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: None knownExposed: 0

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

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

mm/util: don't read __page_2 for order-1 folios in snapshot_page()

snapshot_page() currently reads __page_2 after checking nr_pages > 1, but it should only do so when nr_pages > 2.

If an order-1 folio is allocated at the end of a vmemmap section, __page_2 will not exist and reading it will cause a fault.

During DLPAR memory remove on a 22 TB ppc64le LPAR, snapshot_page() oopsed on the page isolation path while reading an order-1 folio's __page_2 from an adjacent absent section (unmapped vmemmap).

Fix this to avoid reading memmap that doesn't exist (e.g., a vmemmap hole).

CVSS v3
7.1
EG Score
7.1(high)
EG Risk
37(Track)
EG Risk 37/100SSVC: Track

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
Severity71% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

August 28, 2026

Last Modified

August 29, 2026

Advisory Details (3)

Auto-updated Aug 29, 2026
No patch confirmed yet.
generic

mm/util: don't read __page_2 for order-1 folios in snapshot_page() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7441d6348c70738e9ed307510db171c7a9b3f4bf
generic

mm/util: don't read __page_2 for order-1 folios in snapshot_page() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c649324571206a30949765320b91ccdb4c1722dc
generic

mm/util: don't read __page_2 for order-1 folios in snapshot_page() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9668ffe0e2a5e2399dce281620198a2e415871fc

Vendor Advisories for CVE-2026-80685(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 12× 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. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 19:18 UTCEG score recompute
  3. 2026-08-29 19:18 UTCGHSA enrichment
  4. 2026-08-29 07:26 UTCEG score recompute
  5. 2026-08-29 07:26 UTCGHSA enrichment
  6. 2026-08-29 06:36 UTCEG score recompute▲ 7.10
  7. 2026-08-29 06:35 UTCGHSA enrichment
  8. 2026-08-29 06:33 UTCMITRE cvelistV5CVSS v3 → 7.1 · severity → HIGH
  9. 2026-08-28 21:42 UTCEPSS rescore
  10. 2026-08-28 08:20 UTCNVD update
  11. 2026-08-28 07:34 UTCEG score recompute
  12. 2026-08-28 07:32 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-80685?
CVE-2026-80685 is a high vulnerability published on August 28, 2026. In the Linux kernel, the following vulnerability has been resolved: mm/util: don't read page2 for order-1 folios in snapshotpage() snapshotpage() currently reads page2 after checking nr_pages > 1, but it should only do so when nr_pages > 2. If an order-1 folio is allocated at the end of a vmemmap…
When was CVE-2026-80685 disclosed?
CVE-2026-80685 was first published in the National Vulnerability Database on August 28, 2026, with the most recent update on August 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-80685 actively exploited?
CVE-2026-80685 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 97.6% of all scored CVEs.
What is the CVSS score of CVE-2026-80685?
CVE-2026-80685 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-80685?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-80685, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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