CVE-2026-89898

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-09-16. A secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.8EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 8.8Exploit: 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:

media: cec: extron-da-hd-4k-plus: add sanity check

Add check to prevent overflowing msg.msg[] in case the incoming data is malformed.

CVSS v3
8.8
EG Score
8.8HIGHhigh confidence
EG Risk
44
EG Risk 44/100CISA 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
Severity88% × 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
0.4%
EPSS %ILE
29th
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 (4)

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

media: cec: extron-da-hd-4k-plus: add sanity check - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/abac9820b26b5cfcb01eb79efe2abdd0ac7e07c3
generic

media: cec: extron-da-hd-4k-plus: add sanity check - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7ad2fec276946a0dedfa54eb26fc38c4fc6a6034
generic

media: cec: extron-da-hd-4k-plus: add sanity check - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/673611cc2ab9769929644ce879f7ea34932a3011
generic

media: cec: extron-da-hd-4k-plus: add sanity check - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/00c13b4ab481a09d915d099815cff1b10926ddd9

Vendor Advisories for CVE-2026-89898(1)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
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 / 75× 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 00:11 UTCEG score recompute
  2. 2026-10-05 00:10 UTCGHSA enrichment
  3. 2026-10-04 23:22 UTCEPSS rescore
  4. 2026-10-04 11:01 UTCGHSA enrichment
  5. 2026-10-03 21:56 UTCEG score recompute
  6. 2026-10-03 21:56 UTCGHSA enrichment
  7. 2026-10-03 08:40 UTCGHSA enrichment
  8. 2026-10-02 18:48 UTCEG score recompute
  9. 2026-10-02 18:48 UTCGHSA enrichment
  10. 2026-10-02 05:42 UTCEG score recompute
  11. 2026-10-02 05:42 UTCGHSA enrichment
  12. 2026-10-01 19:51 UTCEPSS rescore
  13. 2026-10-01 16:15 UTCGHSA enrichment
  14. 2026-10-01 03:07 UTCEG score recompute
  15. 2026-10-01 03:07 UTCGHSA enrichment
  16. 2026-09-30 15:04 UTCEPSS rescore
  17. 2026-09-30 14:02 UTCGHSA enrichment
  18. 2026-09-30 00:55 UTCEG score recompute
  19. 2026-09-30 00:55 UTCGHSA enrichment
  20. 2026-09-29 07:31 UTCEG score recompute
  21. 2026-09-29 07:31 UTCGHSA enrichment
  22. 2026-09-28 18:25 UTCEG score recompute
  23. 2026-09-28 18:25 UTCGHSA enrichment
  24. 2026-09-28 13:52 UTCEPSS rescore
  25. 2026-09-28 13:52 UTCEPSS rescore
Show 50 more
  1. 2026-09-28 04:27 UTCGHSA enrichment
  2. 2026-09-27 15:22 UTCEG score recompute
  3. 2026-09-27 15:22 UTCGHSA enrichment
  4. 2026-09-27 13:49 UTCEPSS rescore
  5. 2026-09-27 02:16 UTCEG score recompute
  6. 2026-09-27 02:16 UTCGHSA enrichment
  7. 2026-09-26 15:59 UTCEPSS rescore
  8. 2026-09-26 13:10 UTCEG score recompute
  9. 2026-09-26 13:09 UTCGHSA enrichment
  10. 2026-09-25 23:56 UTCGHSA enrichment
  11. 2026-09-25 10:50 UTCGHSA enrichment
  12. 2026-09-24 21:32 UTCEG score recompute
  13. 2026-09-24 21:32 UTCGHSA enrichment
  14. 2026-09-24 14:04 UTCEPSS rescore
  15. 2026-09-24 08:19 UTCGHSA enrichment
  16. 2026-09-23 19:14 UTCEG score recompute
  17. 2026-09-23 19:14 UTCGHSA enrichment
  18. 2026-09-23 17:54 UTCEPSS rescore
  19. 2026-09-23 05:34 UTCGHSA enrichment
  20. 2026-09-22 16:28 UTCEG score recompute
  21. 2026-09-22 16:28 UTCGHSA enrichment
  22. 2026-09-22 16:01 UTCEPSS rescore
  23. 2026-09-22 03:16 UTCEG score recompute
  24. 2026-09-22 03:15 UTCGHSA enrichment
  25. 2026-09-21 21:09 UTCEPSS rescore
  26. 2026-09-21 14:09 UTCGHSA enrichment
  27. 2026-09-21 01:03 UTCEG score recompute
  28. 2026-09-21 01:02 UTCGHSA enrichment
  29. 2026-09-20 20:16 UTCEPSS rescore
  30. 2026-09-20 11:56 UTCGHSA enrichment
  31. 2026-09-19 22:50 UTCEG score recompute
  32. 2026-09-19 22:50 UTCGHSA enrichment
  33. 2026-09-19 09:44 UTCGHSA enrichment
  34. 2026-09-18 20:38 UTCEG score recompute
  35. 2026-09-18 20:38 UTCGHSA enrichment
  36. 2026-09-18 19:28 UTCEPSS rescore
  37. 2026-09-18 07:25 UTCEG score recompute
  38. 2026-09-18 07:25 UTCGHSA enrichment
  39. 2026-09-17 19:32 UTCEPSS rescore
  40. 2026-09-17 18:19 UTCGHSA enrichment
  41. 2026-09-17 04:26 UTCEG score recompute
  42. 2026-09-17 04:26 UTCGHSA enrichment
  43. 2026-09-16 15:20 UTCEG score recompute
  44. 2026-09-16 15:19 UTCGHSA enrichment
  45. 2026-09-16 14:48 UTCEG score recompute▲ 8.80
  46. 2026-09-16 14:48 UTCGHSA enrichment
  47. 2026-09-16 14:45 UTCMITRE cvelistV5CVSS v3 → 8.8 · severity → HIGH
  48. 2026-09-16 11:21 UTCNVD update
  49. 2026-09-16 10:39 UTCEG score recompute
  50. 2026-09-16 10:36 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-89898?
CVE-2026-89898 is a high vulnerability published on September 16, 2026. In the Linux kernel, the following vulnerability has been resolved: media: cec: extron-da-hd-4k-plus: add sanity check Add check to prevent overflowing msg.msg[] in case the incoming data is malformed.
When was CVE-2026-89898 disclosed?
CVE-2026-89898 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-2026-89898 actively exploited?
CVE-2026-89898 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (29th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-89898?
CVE-2026-89898 has a CVSS base score of 8.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-89898?
No fix for CVE-2026-89898 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-2026-89898 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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