Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2019-18806

CVE-2019-18806MEDIUM

n/a n/a — A memory leak in the ql_alloc_large_buffers() function in drivers/net/ethernet/qlogic/qla3xxx.c in the Linux kernel before 5.3.5 allows l…

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   L   N  U  N  N  H    5.5   .0035   26.9     —

AFFECTED
  Product  Versions  Fixed
  n/a      n/a –     —

TIMELINE
  Nov 7   Reserved by mitre
  Nov 7   Published (CNA: mitre)
  Oct 8   ENRICHED — CVE-2019-18806. Received CVSS 5.5 and CPE data from NVD.

CWE-401 · CNA: mitre · CVSS v3.1 · 2 references · NVD status: Modified

Description

A memory leak in the ql_alloc_large_buffers() function in drivers/net/ethernet/qlogic/qla3xxx.c in the Linux kernel before 5.3.5 allows local users to cause a denial of service (memory consumption) by triggering pci_dma_mapping_error() failures, aka CID-1acb8f2a7a9f.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
November 7, 2019	Reserved	Reserved by mitre
November 7, 2019	Published	Published (CNA: mitre)
October 8, 2026	ENRICHED	ENRICHED — CVE-2019-18806. Received CVSS 5.5 and CPE data from NVD.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
n/a	n/a	—	n/a	—

Weaknesses

CWE-401

References (2)

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.5 [Mailing List, Vendor Advisory]
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1acb8f2a7a9f10543868ddd737e37424d5c36cf4 [Mailing List, Patch, Third Party Advisory]

Authoritative record: CVE-2019-18806 at cve.org

Weaknesses: CWE-401

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2019-18806 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.