CVE-2026-90341

HIGHPre-NVD 7.77.7—
EchelonGraph scoreHIGH confidence

Score 7.7 from GitHub Security Advisory (severity: HIGH) published 2026-09-17. A secondary CVSS source baseline 7.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.7EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.7Exploit: 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:

firmware: coreboot: Validate table bounds

The existing coreboot_table_populate() bounds checks limit individual entries to the mapped length. However, coreboot_table_probe() replaces the platform resource length with header and table sizes supplied by firmware before mapping the full table.

A malformed table can overflow the 32-bit size addition or advertise an extent beyond the resource, causing the driver to map and parse memory outside the resource. A resource shorter than the fixed header is also mapped as though it contained a complete header.

Reject resources shorter than the fixed header. After validating the signature, require a complete header, calculate the advertised extent with overflow checking, and reject extents beyond the resource before remapping the table.

CVSS v3
7.7
EG Score
7.7HIGHhigh confidence
EG Risk
39
EG Risk 39/100CISA 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
Severity77% × 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
7th
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 17, 2026

Last Modified

September 18, 2026

Advisory Details (8)

Auto-updated Sep 18, 2026
No patch confirmed yet.
generic

firmware: coreboot: Validate table bounds - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fd93859ecfa5b6495a6863c18fd923a7666def26
generic

firmware: coreboot: Validate table bounds - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f79f621215a0944c4a0e1b3b86b99e433ae8c527
generic

firmware: coreboot: Validate table bounds - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e82f260a74dea8cdd7857f2cc66f73d0da522bb3
generic

firmware: coreboot: Validate table bounds - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d848fac90c6f0566e7b93066b0b86024f65f395e
generic

firmware: coreboot: Validate table bounds - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a58a57a1076f8c5dae0327e3710899478c3be901
generic

firmware: coreboot: Validate table bounds - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/88027241c1d2c3213bac937a1c2cb89a5775a413
generic

firmware: coreboot: Validate table bounds - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3cca0d6dd4c2636d2514234233cb02db76621607
generic

firmware: coreboot: Validate table bounds - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2d98a3b89394f283f054a4a54587c14ee89acaf9

Vendor Advisories for CVE-2026-90341(1)

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

Affected Packages

(4 across 3 ecosystems)
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 7.2~rc7-1~exp1 (360 versions)
  • every version on: no fix on record
—
linux-6.126.12.100-1~deb12u1, 6.12.101-1~deb12u1, 6.12.107-1~deb12u1
  • every version up to 6.12.111-1~deb12u1: fixed in 6.12.111-1~deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.12.96-1 (35 versions)
  • every version up to 6.12.111-1: fixed in 6.12.111-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.2~rc7-1~exp1 (179 versions)
  • every version up to 7.2.6-1: fixed in 7.2.6-1
—

Data Freshness Timeline

(refreshed 25× in last 7d / 68× 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 01:04 UTCEG score recompute
  2. 2026-10-05 01:04 UTCGHSA enrichment
  3. 2026-10-04 23:22 UTCEPSS rescore
  4. 2026-10-04 11:55 UTCGHSA enrichment
  5. 2026-10-03 22:58 UTCEG score recompute
  6. 2026-10-03 22:58 UTCGHSA enrichment
  7. 2026-10-03 10:00 UTCGHSA enrichment
  8. 2026-10-02 20:46 UTCEG score recompute
  9. 2026-10-02 20:46 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 18:52 UTCGHSA enrichment
  14. 2026-10-01 05:50 UTCGHSA enrichment
  15. 2026-09-30 16:53 UTCEG score recompute
  16. 2026-09-30 16:53 UTCGHSA enrichment
  17. 2026-09-30 15:04 UTCEPSS rescore
  18. 2026-09-30 03:04 UTCEG score recompute
  19. 2026-09-30 03:04 UTCGHSA enrichment
  20. 2026-09-29 14:07 UTCGHSA enrichment
  21. 2026-09-29 01:11 UTCEG score recompute
  22. 2026-09-29 01:11 UTCGHSA enrichment
  23. 2026-09-28 13:52 UTCEPSS rescore
  24. 2026-09-28 13:52 UTCEPSS rescore
  25. 2026-09-28 12:13 UTCGHSA enrichment
Show 43 more
  1. 2026-09-27 23:16 UTCEG score recompute
  2. 2026-09-27 23:16 UTCGHSA enrichment
  3. 2026-09-27 13:49 UTCEPSS rescore
  4. 2026-09-27 10:19 UTCGHSA enrichment
  5. 2026-09-26 21:19 UTCEG score recompute
  6. 2026-09-26 21:19 UTCGHSA enrichment
  7. 2026-09-26 15:59 UTCEPSS rescore
  8. 2026-09-26 08:22 UTCEG score recompute
  9. 2026-09-26 08:21 UTCGHSA enrichment
  10. 2026-09-25 19:19 UTCGHSA enrichment
  11. 2026-09-25 05:55 UTCGHSA enrichment
  12. 2026-09-24 16:58 UTCEG score recompute
  13. 2026-09-24 16:58 UTCGHSA enrichment
  14. 2026-09-24 14:04 UTCEPSS rescore
  15. 2026-09-24 04:01 UTCEG score recompute
  16. 2026-09-24 04:01 UTCGHSA enrichment
  17. 2026-09-23 17:54 UTCEPSS rescore
  18. 2026-09-23 15:04 UTCGHSA enrichment
  19. 2026-09-23 02:07 UTCEG score recompute
  20. 2026-09-23 02:07 UTCGHSA enrichment
  21. 2026-09-22 16:01 UTCEPSS rescore
  22. 2026-09-22 13:09 UTCGHSA enrichment
  23. 2026-09-22 00:12 UTCEG score recompute
  24. 2026-09-22 00:12 UTCGHSA enrichment
  25. 2026-09-21 21:09 UTCEPSS rescore
  26. 2026-09-21 11:15 UTCGHSA enrichment
  27. 2026-09-20 22:19 UTCEG score recompute
  28. 2026-09-20 22:19 UTCGHSA enrichment
  29. 2026-09-20 20:16 UTCEPSS rescore
  30. 2026-09-20 09:22 UTCGHSA enrichment
  31. 2026-09-19 20:25 UTCEG score recompute
  32. 2026-09-19 20:25 UTCGHSA enrichment
  33. 2026-09-19 07:28 UTCEG score recompute
  34. 2026-09-19 07:27 UTCGHSA enrichment
  35. 2026-09-18 19:28 UTCEPSS rescore
  36. 2026-09-18 18:30 UTCEG score recompute
  37. 2026-09-18 18:30 UTCGHSA enrichment
  38. 2026-09-18 18:02 UTCEG score recompute▲ 7.70
  39. 2026-09-18 18:02 UTCGHSA enrichment
  40. 2026-09-18 17:59 UTCMITRE cvelistV5CVSS v3 → 7.7 · severity → HIGH
  41. 2026-09-17 17:24 UTCNVD update
  42. 2026-09-17 16:28 UTCEG score recompute
  43. 2026-09-17 16:19 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-90341?
CVE-2026-90341 is a high vulnerability published on September 17, 2026. In the Linux kernel, the following vulnerability has been resolved: firmware: coreboot: Validate table bounds The existing coreboottablepopulate() bounds checks limit individual entries to the mapped length. However, coreboottableprobe() replaces the platform resource length with header and table…
When was CVE-2026-90341 disclosed?
CVE-2026-90341 was first published on September 17, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-90341 actively exploited?
CVE-2026-90341 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (7th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-90341?
CVE-2026-90341 has a CVSS base score of 7.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-90341?
No fix for CVE-2026-90341 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-2026-90341 are linked in the Vendor Advisories panel on this page.

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