CVE-2019-8460

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2022-05-24. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 2%CVSS: 7.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

OpenBSD kernel version <= 6.5 can be forced to create long chains of TCP SACK holes that causes very expensive calls to tcp_sack_option() for every incoming SACK packet which can lead to a denial of service.

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
80.3%
KEV
Not listed

Published

August 26, 2019

Last Modified

November 21, 2024

References (10)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 43× 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. 2026-07-11 08:24 UTCEPSS rescore
  2. 2026-07-11 08:24 UTCEPSS rescore
  3. 2026-07-09 19:06 UTCEPSS rescore
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  19. 2026-06-27 03:06 UTCEPSS rescore
  20. 2026-06-25 13:47 UTCEPSS rescore
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  22. 2026-06-24 14:03 UTCEPSS rescore
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  24. 2026-06-23 21:31 UTCEPSS rescore
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  1. 2026-06-22 14:23 UTCEPSS rescore
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  3. 2026-06-21 14:54 UTCEPSS rescore
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  5. 2026-06-21 01:57 UTCEPSS rescore
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  7. 2026-06-19 19:23 UTCEPSS rescore
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  9. 2026-06-18 17:50 UTCEPSS rescore
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  11. 2026-06-17 17:50 UTCEPSS rescore
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  17. 2026-06-12 23:09 UTCEPSS rescore
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  19. 2026-06-11 13:58 UTCEPSS rescore
  20. 2026-06-10 22:16 UTCEPSS rescore
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  22. 2026-06-10 13:19 UTCEPSS rescore
  23. 2026-06-08 14:15 UTCEPSS rescore
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  26. 2026-06-07 15:23 UTCEPSS rescore
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  28. 2026-06-06 13:45 UTCEPSS rescore
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  30. 2026-06-05 22:45 UTCEPSS rescore
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  36. 2026-06-01 13:50 UTCEPSS rescore
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  40. 2026-05-31 00:14 UTCEPSS rescore
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  42. 2026-05-29 13:42 UTCEPSS rescore
  43. 2026-05-28 13:43 UTCEPSS rescore
  44. 2026-05-28 13:43 UTCEPSS rescore
  45. 2026-05-27 15:13 UTCEG score recompute
  46. 2026-05-27 15:13 UTCGHSA enrichment
  47. 2026-05-27 13:39 UTCEPSS rescore
  48. 2026-05-27 13:38 UTCEPSS rescore
  49. 2026-05-26 13:42 UTCEPSS rescore
  50. 2026-05-26 07:17 UTCEPSS rescore
  51. 2026-05-26 07:17 UTCEPSS rescore
  52. 2026-05-26 07:17 UTCEPSS rescore
  53. 2026-05-24 16:47 UTCEPSS rescore

Frequently asked(5)

What is CVE-2019-8460?
CVE-2019-8460 is a high vulnerability published on August 26, 2019. OpenBSD kernel version <= 6.5 can be forced to create long chains of TCP SACK holes that causes very expensive calls to tcpsackoption() for every incoming SACK packet which can lead to a denial of service.
When was CVE-2019-8460 disclosed?
CVE-2019-8460 was first published in the National Vulnerability Database on August 26, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2019-8460 actively exploited?
CVE-2019-8460 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 80.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2019-8460?
CVE-2019-8460 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2019-8460?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-8460, 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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