CVE intelligence and bounded remediation

CVE-2019-16275 — W1.Fi Hostapd security vulnerability

Medium CVSS 6.5

hostapd before 2.10 and wpa_supplicant before 2.10 allow an incorrect indication of disconnection in certain situations because source address validation is mishandled. This is a denial of service that should have been prevented by PMF (aka management frame protection). The attacker must send a crafted 802.11 frame from a location that is within the 802.11 communications range.

Severity
Medium
CVSS
6.5 (3.1)
Published
2019-09-12
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-346

Affected products

  • w1.fi / hostapd
  • w1.fi / wpa_supplicant
  • debian / debian_linux / 8.0
  • debian / debian_linux / 10.0
  • canonical / ubuntu_linux / 12.04
  • canonical / ubuntu_linux / 14.04

Showing 6 representative product identities from 9 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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