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CVE Record

CVE-2022-0934: A single-byte, non-arbitrary write/use-after-free flaw was found in dnsmasq.

A single-byte, non-arbitrary write/use-after-free flaw was found in dnsmasq. This flaw allows an attacker who sends a crafted packet processed by dnsmasq, potentially causing a denial of service.

HighCVSS 7.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2022-0934 is a dnsmasq memory-safety flaw that can let an unauthenticated network attacker crash the service with a crafted packet. The business risk is service disruption, not confirmed data theft or system takeover, based on the supplied sources.

Executive priority

Treat this as a high-priority availability risk for infrastructure relying on dnsmasq. Prioritize internet-facing or untrusted-network deployments first, then internal services where DNS or DHCP disruption would affect operations.

Technical view

The issue is described as a single-byte, non-arbitrary write/use-after-free in dnsmasq. CVSS 3.1 is 7.5: network attack vector, low complexity, no privileges, no user interaction, and high availability impact only. The supplied bundle does not provide an exact affected version range.

Likely exposure

Exposure is most relevant where dnsmasq processes packets from untrusted or broadly reachable networks. Red Hat and Debian references indicate distribution-level tracking, but the supplied data lists dnsmasq versions as unknown.

Exploitation context

The source bundle supports potential denial of service from crafted packets processed by dnsmasq. It does not cite CISA KEV listing, public exploitation, exploit availability, or confirmed real-world attacks.

Researcher notes

Evidence is adequate for classification as a network-triggerable dnsmasq denial-of-service issue, but incomplete for affected version boundaries. The upstream commit and vendor advisories should be used to confirm fix inclusion without inferring exploitability beyond the supplied description.

Mitigation direction

  • Apply vendor dnsmasq updates from the relevant Linux distribution or product maintainer.
  • Review Red Hat, Debian, and upstream dnsmasq guidance for fixed package status.
  • Restrict dnsmasq exposure to trusted networks and required interfaces only.
  • Monitor dnsmasq crashes, restarts, and availability alerts until remediation is complete.

Validation and detection

  • Inventory systems, containers, and images where dnsmasq is installed or bundled.
  • Map which dnsmasq instances receive traffic from untrusted networks.
  • Compare installed packages against vendor advisories and fixed update channels.
  • Confirm remediation through package status, service restart history, and change records.
Prepared
Confidence
medium
Sources
7

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-416: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2022-0934 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
6Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

7.5High
CVSS 3.1 vector shape for CVE-2022-0934Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/adnsmasqNot-KnownListed
Weakness

CWE details

CWE-416

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-416 · source CWE mapping

Use After Free

Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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