CVE-2019-11478

MEDIUMNVD 5.39.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because EPSS predicts 95% probability of exploitation within the next 30 days (top 0.2% of all CVEs). NVD baseline CVSS 5.3 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss, ghsa, nvd
Trending — 5 sources updated this weekElevated
5.3
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 95%
CISA-KEV: Not listedEPSS: 95%CVSS: 5.3Exploit: NoneExposed: 0

A fix is available — apply it.

Jonathan Looney discovered that the TCP retransmission queue implementation in tcp_fragment in the Linux kernel could be fragmented when handling certain TCP Selective Acknowledgment (SACK) sequences. A remote attacker could use this to cause a denial of service. This has been fixed in stable kernel releases 4.4.182, 4.9.182, 4.14.127, 4.19.52, 5.1.11, and is fixed in commit f070ef2ac66716357066b683fb0baf55f8191a2e.

CVSS v3
5.3
EG Score
9.0(high)
EG Risk
83(Track)
EG Risk 83/100SSVC: Track

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
Severity90% × 45%
Exploitation95% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
99.8%
KEV
Not listed

Published

June 19, 2019

Last Modified

November 21, 2024

References (58)

Patch Availability(17)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-image-3.2.0-141-powerpc-smp (3.2.0-141.188) @ precise2026-05-27ubuntu
ubuntulinux-image-virtual-lts-xenial (4.4.0.151.159) @ xenial2026-05-27ubuntu
redhatredhat-virtualization-host-0:4.3.4-20190620.3.el7_62019-07-08redhat
redhatredhat-virtualization-host-0:4.2-20190618.0.el7_62019-06-25redhat
redhatkernel-alt-0:4.14.0-115.8.2.el7a2019-06-25redhat
redhatkernel-0:3.10.0-514.66.2.el72019-06-17redhat
redhatkernel-0:3.10.0-957.21.3.el72019-06-17redhat
redhatkernel-0:4.18.0-80.4.2.el8_02019-06-17redhat
redhatkernel-rt-1:3.10.0-693.50.3.rt56.644.el6rt2019-06-17redhat
redhatkernel-0:2.6.32-754.15.3.el62019-06-17redhat
redhatkernel-0:2.6.32-504.79.3.el62019-06-17redhat
redhatkernel-0:3.10.0-862.34.2.el72019-06-17redhat
redhatkernel-rt-0:4.18.0-80.4.2.rt9.152.el8_02019-06-17redhat
redhatkernel-0:3.10.0-327.79.2.el72019-06-17redhat
redhatkernel-0:3.10.0-693.50.3.el72019-06-17redhat
redhatkernel-0:2.6.32-431.95.3.el62019-06-17redhat
redhatkernel-rt-0:3.10.0-957.21.3.rt56.935.el72019-06-17redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(2)

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

All Vendor Advisories

(17)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 9× in last 7d / 18× 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. 2026-07-23 01:39 UTCEG score recompute
  2. 2026-07-22 21:29 UTCEG score recompute▲ 1.50
  3. 2026-07-22 21:29 UTCVendor advisory
  4. 2026-07-22 21:29 UTCGHSA enrichment
  5. 2026-07-22 14:05 UTCEPSS rescore
  6. 2026-07-21 15:22 UTCEPSS rescore
  7. 2026-07-21 15:22 UTCEPSS rescore
  8. 2026-07-20 17:04 UTCEPSS rescore
  9. 2026-07-20 14:32 UTCOSV refresh
  10. 2026-07-13 06:10 UTCEPSS rescore
  11. 2026-07-13 06:10 UTCEPSS rescore
  12. 2026-07-03 09:56 UTCOSV refresh
  13. 2026-06-28 04:54 UTCEPSS rescore
  14. 2026-06-28 04:53 UTCEPSS rescore
  15. 2026-06-24 14:03 UTCEPSS rescore
  16. 2026-06-24 14:02 UTCEPSS rescore
  17. 2026-06-23 21:30 UTCEPSS rescore
  18. 2026-06-23 21:30 UTCEPSS rescore
  19. 2026-06-16 17:50 UTCEPSS rescore
  20. 2026-06-15 17:45 UTCEPSS rescore
  21. 2026-06-15 00:13 UTCOSV refresh
  22. 2026-06-14 23:15 UTCEPSS rescore
  23. 2026-06-14 23:15 UTCEPSS rescore
  24. 2026-06-12 23:09 UTCEPSS rescore
  25. 2026-06-11 13:58 UTCEPSS rescore
Show 26 more
  1. 2026-06-11 13:58 UTCEPSS rescore
  2. 2026-06-10 22:16 UTCEPSS rescore
  3. 2026-06-10 13:19 UTCEPSS rescore
  4. 2026-06-08 14:15 UTCEPSS rescore
  5. 2026-06-08 14:14 UTCEPSS rescore
  6. 2026-06-06 13:45 UTCEPSS rescore
  7. 2026-06-06 13:45 UTCEPSS rescore
  8. 2026-06-05 22:45 UTCEPSS rescore
  9. 2026-06-05 22:45 UTCEPSS rescore
  10. 2026-06-05 06:08 UTCEPSS rescore
  11. 2026-06-05 06:08 UTCEPSS rescore
  12. 2026-06-04 13:10 UTCEPSS rescore
  13. 2026-06-04 13:10 UTCEPSS rescore
  14. 2026-06-02 20:11 UTCEPSS rescore
  15. 2026-06-01 13:50 UTCEPSS rescore
  16. 2026-06-01 13:50 UTCEPSS rescore
  17. 2026-05-31 22:29 UTCEPSS rescore
  18. 2026-05-31 22:29 UTCEPSS rescore
  19. 2026-05-29 13:42 UTCEPSS rescore
  20. 2026-05-28 13:43 UTCEPSS rescore
  21. 2026-05-27 18:14 UTCEG score recompute
  22. 2026-05-27 18:14 UTCVendor advisory
  23. 2026-05-27 18:14 UTCGHSA enrichment
  24. 2026-05-27 13:38 UTCEPSS rescore
  25. 2026-05-26 13:42 UTCEPSS rescore
  26. 2026-05-26 13:42 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2019-11478?
CVE-2019-11478 is a medium vulnerability published on June 19, 2019. Jonathan Looney discovered that the TCP retransmission queue implementation in tcp_fragment in the Linux kernel could be fragmented when handling certain TCP Selective Acknowledgment (SACK) sequences. A remote attacker could use this to cause a denial of service. This has been fixed in stable…
When was CVE-2019-11478 disclosed?
CVE-2019-11478 was first published in the National Vulnerability Database on June 19, 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-2019-11478 actively exploited?
CVE-2019-11478 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2019-11478?
CVE-2019-11478 has a CVSS v3 base score of 5.3 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
How do I remediate CVE-2019-11478?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-11478, 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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