CVE-2026-68434

UNRATEDCVSS · not yet scoredTrending — 5 sources updated this week
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EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No CVSS published and no exploitation signals yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS v2: —Exploit: 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:

serial: 8250_mid: Fix NULL function pointer dereference on DNV/ICX-D/SNR platforms

Commit b1b4efea05a5 ("serial: 8250_mid: Disable DMA for selected platforms") replaced the dnv_board setup and exit callbacks with PTR_IF(false, ...), which evaluates to NULL. However, the three call sites in mid8250_probe() and mid8250_remove() unconditionally dereference these function pointers without NULL checks, causing a NULL pointer dereference (kernel oops) on any Denverton (DNV), Ice Lake Xeon D (ICX-D/CDF), or Snowridge (SNR) platform.

Fix this by adding the missing NULL checks before calling the setup and exit callbacks.

CVSS v3
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EchelonGraph score
Not yet assessedNo source has published severity data for this CVE yet — no CVSS score from NVD or a CNA, no GitHub advisory, and it is not in CISA KEV. This is not a rating of zero; we cannot assess it yet.
EG Score
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EG Risk
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EPSS PROB
0%
EPSS %ILE
7%
KEV
Not listed

Published

August 12, 2026

Last Modified

August 19, 2026

References (6)

Vendor Advisories for CVE-2026-68434(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 16× in last 7d / 20× 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. 2026-08-20 22:56 UTCEPSS rescore
  2. 2026-08-19 17:33 UTCGHSA enrichment
  3. 2026-08-19 17:32 UTCNVD update
  4. 2026-08-19 17:04 UTCEPSS rescore
  5. 2026-08-19 16:47 UTCGHSA enrichment
  6. 2026-08-19 16:43 UTCMITRE cvelistV5
  7. 2026-08-17 13:47 UTCEPSS rescore
  8. 2026-08-17 06:31 UTCGHSA enrichment
  9. 2026-08-17 06:18 UTCNVD update
  10. 2026-08-17 05:35 UTCGHSA enrichment
  11. 2026-08-17 05:24 UTCMITRE cvelistV5
  12. 2026-08-16 14:56 UTCEPSS rescore
  13. 2026-08-16 14:56 UTCEPSS rescore
  14. 2026-08-15 01:30 UTCEPSS rescore
  15. 2026-08-14 19:07 UTCEG score recompute
  16. 2026-08-14 19:07 UTCGHSA enrichment
  17. 2026-08-12 13:51 UTCEPSS rescore
  18. 2026-08-12 00:19 UTCNVD update
  19. 2026-08-12 00:15 UTCEG score recompute
  20. 2026-08-12 00:15 UTCMITRE cvelistV5first tracked

Frequently asked(4)

What is CVE-2026-68434?
CVE-2026-68434 is a publicly disclosed vulnerability published on August 12, 2026. In the Linux kernel, the following vulnerability has been resolved: serial: 8250_mid: Fix NULL function pointer dereference on DNV/ICX-D/SNR platforms Commit b1b4efea05a5 ("serial: 8250_mid: Disable DMA for selected platforms") replaced the dnv_board setup and exit callbacks with PTR_IF(false,…
When was CVE-2026-68434 disclosed?
CVE-2026-68434 was first published in the National Vulnerability Database on August 12, 2026, with the most recent update on August 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-68434 actively exploited?
CVE-2026-68434 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 92.9% of all scored CVEs.
How do I remediate CVE-2026-68434?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-68434, 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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