CVE-2026-80723

HIGHPre-NVD 8.48.4—
EchelonGraph scoreHIGH confidence

Score 8.4 from GitHub Security Advisory (severity: HIGH) published 2026-08-28. a secondary CVSS source baseline 8.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this week
8.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.4Exploit: 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:

of: reserved_mem: prevent OOB when too many dynamic regions are defined

On boot, fdt_scan_reserved_mem() saves each dynamically-placed /reserved-memory subnode into a local array of size MAX_RESERVED_REGIONS.

If the device tree defines more than MAX_RESERVED_REGIONS dynamically-placed regions, fdt_scan_reserved_mem() writes past the end of the local array.

Add a bounds check that logs an error and skips the excess regions, restoring the original behavior.

CVSS v3
8.4
EG Score
8.4(high)
EG Risk
42(Track)
EG Risk 42/100SSVC: 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
Severity84% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

August 28, 2026

Last Modified

August 29, 2026

Advisory Details (4)

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

of: reserved_mem: prevent OOB when too many dynamic regions are defined - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/db3dbdfea1b8f38774419c5c2c14e4b81c48708d
generic

of: reserved_mem: prevent OOB when too many dynamic regions are defined - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/de8ccbd6bf4efe7a059e2c483789936009e10f42
generic

of: reserved_mem: prevent OOB when too many dynamic regions are defined - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/cfa7e2734877330d6c10e0f33953905486c4530c
generic

of: reserved_mem: prevent OOB when too many dynamic regions are defined - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/68d27250c9e81ab7764603e346c2b1017cb53adf

Vendor Advisories for CVE-2026-80723(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 14× in last 7d / 14× 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 05:28 UTCEG score recompute
  2. 2026-08-30 05:28 UTCGHSA enrichment
  3. 2026-08-30 01:22 UTCEPSS rescore
  4. 2026-08-29 18:26 UTCEG score recompute
  5. 2026-08-29 18:26 UTCGHSA enrichment
  6. 2026-08-29 07:24 UTCEG score recompute
  7. 2026-08-29 07:24 UTCGHSA enrichment
  8. 2026-08-29 06:35 UTCEG score recompute▲ 8.40
  9. 2026-08-29 06:35 UTCGHSA enrichment
  10. 2026-08-29 06:33 UTCMITRE cvelistV5CVSS v3 → 8.4 · severity → HIGH
  11. 2026-08-28 21:42 UTCEPSS rescore
  12. 2026-08-28 08:20 UTCNVD update
  13. 2026-08-28 07:33 UTCEG score recompute
  14. 2026-08-28 07:32 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-80723?
CVE-2026-80723 is a high vulnerability published on August 28, 2026. In the Linux kernel, the following vulnerability has been resolved: of: reserved_mem: prevent OOB when too many dynamic regions are defined On boot, fdtscanreserved_mem() saves each dynamically-placed /reserved-memory subnode into a local array of size MAXRESERVEDREGIONS. If the device tree defines…
When was CVE-2026-80723 disclosed?
CVE-2026-80723 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-2026-80723 actively exploited?
CVE-2026-80723 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 96.8% of all scored CVEs.
What is the CVSS score of CVE-2026-80723?
CVE-2026-80723 has a CVSS v3 base score of 8.4 (NVD).
How do I remediate CVE-2026-80723?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-80723, 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.

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