CVE-2026-74225

HIGHPre-NVD 7.17.1—
EchelonGraph scoreHIGH confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-09-30. A secondary CVSS source baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.1EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.1Exploit: None knownExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

U-Boot before 2026.10-rc5 contains out-of-bounds memory access in dhcp6_parse_options() that fails to validate SERVERID and CLIENTID option lengths from DHCPv6 packets. Attackers on the local network can send crafted DHCPv6 ADVERTISE or REPLY packets during netboot to corrupt memory and crash the bootloader.

CVSS v3
7.1
EG Score
7.1HIGHhigh confidence
EG Risk
32
EG Risk 32/100CISA 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
Severity71% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.
EPSS PROB
0.2%
EPSS %ILE
12th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). 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 29, 2026

Last Modified

September 30, 2026

Advisory Details (4)

Auto-updated Sep 29, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

U-Boot before 2026.10-rc5 Out-of-Bounds Write via DHCPv6 | Advisories | VulnCheck

https://www.vulncheck.com/advisories/u-boot-before-2026.10-rc5-out-of-bounds-write-via-dhcpv6
generic

GitHub - u-boot/u-boot: "Das U-Boot" Source Tree · GitHub

https://github.com/u-boot/u-boot
generic

u-boot/net/dhcpv6.c at v2026.07 · u-boot/u-boot · GitHub

https://github.com/u-boot/u-boot/blob/v2026.07/net/dhcpv6.c#L304
github_commit

commit 20209a62bc85 (u-boot/u-boot)

Fix landed in u-boot/u-boot commit 20209a62bc85 — awaiting tagged release

https://github.com/u-boot/u-boot/commit/20209a62bc8565fc1e040882bc03c71ff0d73076

Vendor Advisories for CVE-2026-74225(1)

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

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 23× in last 7d / 23× 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. 2026-10-04 11:09 UTCGHSA enrichment
  2. 2026-10-03 22:46 UTCEG score recompute
  3. 2026-10-03 22:46 UTCGHSA enrichment
  4. 2026-10-03 14:26 UTCEPSS rescore
  5. 2026-10-03 10:22 UTCGHSA enrichment
  6. 2026-10-02 21:58 UTCEG score recompute
  7. 2026-10-02 21:58 UTCGHSA enrichment
  8. 2026-10-02 09:34 UTCGHSA enrichment
  9. 2026-10-01 21:10 UTCEG score recompute
  10. 2026-10-01 21:10 UTCGHSA enrichment
  11. 2026-10-01 19:50 UTCEPSS rescore
  12. 2026-10-01 08:46 UTCGHSA enrichment
  13. 2026-09-30 20:23 UTCEG score recompute
  14. 2026-09-30 20:23 UTCGHSA enrichment
  15. 2026-09-30 19:26 UTCEG score recompute
  16. 2026-09-30 19:26 UTCGHSA enrichment
  17. 2026-09-30 16:45 UTCEG score recompute
  18. 2026-09-30 16:45 UTCGHSA enrichment
  19. 2026-09-30 10:51 UTCEG score recompute
  20. 2026-09-30 10:51 UTCGHSA enrichment
  21. 2026-09-29 22:25 UTCEG score recompute
  22. 2026-09-29 21:37 UTCEG score recompute
  23. 2026-09-29 21:33 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-74225?
CVE-2026-74225 is a high vulnerability published on September 29, 2026. U-Boot before 2026.10-rc5 contains out-of-bounds memory access in dhcp6parseoptions() that fails to validate SERVERID and CLIENTID option lengths from DHCPv6 packets. Attackers on the local network can send crafted DHCPv6 ADVERTISE or REPLY packets during netboot to corrupt memory and crash the…
When was CVE-2026-74225 disclosed?
CVE-2026-74225 was first published on September 29, 2026, with the most recent update on September 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74225 actively exploited?
CVE-2026-74225 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (12th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-74225?
CVE-2026-74225 has a CVSS base score of 7.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-74225?
An upstream fix for CVE-2026-74225 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-74225 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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