CVE intelligence and bounded remediation

CVE-2019-3900 — Linux Linux Kernel security vulnerability

High CVSS 7.7

An infinite loop issue was found in the vhost_net kernel module in Linux Kernel up to and including v5.1-rc6, while handling incoming packets in handle_rx(). It could occur if one end sends packets faster than the other end can process them. A guest user, maybe remote one, could use this flaw to stall the vhost_net kernel thread, resulting in a DoS scenario.

Severity
High
CVSS
7.7 (3.1)
Published
2019-04-25
CISA KEV
Not currently listed
Ecosystem
linux/kernel
Weaknesses
CWE-835

Affected products

  • linux / linux_kernel
  • fedoraproject / fedora / 29
  • fedoraproject / fedora / 30
  • redhat / enterprise_linux / 6.0
  • redhat / enterprise_linux / 7.0
  • debian / debian_linux / 8.0

Showing 6 representative product identities from 28 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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