CVE intelligence and bounded remediation

CVE-2019-3882 — A flaw was found in the Linux kernel's vfio interface implementation that permits violation of the user's locked memory limit

Medium CVSS 5.5

A flaw was found in the Linux kernel's vfio interface implementation that permits violation of the user's locked memory limit. If a device is bound to a vfio driver, such as vfio-pci, and the local attacker is administratively granted ownership of the device, it may cause a system memory exhaustion and thus a denial of service (DoS). Versions 3.10, 4.14 and 4.18 are vulnerable.

Severity
Medium
CVSS
5.5 (3.1)
Published
2019-04-24
CISA KEV
Not currently listed
Ecosystem
linux/kernel
Weaknesses
CWE-770

Affected products

  • linux / linux_kernel / 3.10
  • linux / linux_kernel / 4.14
  • linux / linux_kernel / 4.18
  • fedoraproject / fedora
  • debian / debian_linux / 8.0
  • debian / debian_linux / 9.0

Showing 6 representative product identities from 23 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Resource exhaustion and denial of service

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Identify attacker-influenced work factors including input size, nesting, compression, fan-out, regex cost, allocation, recursion, retries, and connection lifetime.
  • Map per-request and shared CPU, memory, disk, descriptor, thread, queue, and downstream-service limits.
  • Determine whether authentication, tenancy, quotas, and rate controls apply before expensive processing begins.

Remediate safely

  • Bound input size, nesting, expansion, work, concurrency, queue depth, retries, and execution time before resource-intensive processing.
  • Release resources on every success, error, cancellation, and timeout path and use backpressure instead of unbounded buffering.
  • Update affected components and add small deterministic tests that assert resource ceilings rather than exhausting a host.

Authoritative sources

Complete CVE record and remediation plan

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