CVE-2026-5172

CVE-2026-5172

HIGH
7.3
CVSS Score
Published: May 11, 2026 at 04:48 PM UTC
Updated: September 1, 2026 at 12:28 PM UTC
2 products affected across 2 vendorsEnterprise LinuxDnsmasq

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Severity
HIGH7.3
Exploit prediction
EPSS 3%
SSVC
No known exploit

Description

A buffer overflow in dnsmasq’s extract_addresses() function allows an attacker to trigger a heap out-of-bounds read and crash by exploiting a malformed DNS response, enabling extract_name() to advance the pointer past the record’s end.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 2.92rel2
Affected range stops below 2.92rel2, so it looks safe — our inference, not a vendor statement
Vendor states this is fixed in 0:2.90-7.el10_2 (unaffected)
Vendor states this is fixed in 7 (unaffected)
Vendor states this is fixed in 6 (unknown)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.3HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
LOW
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-125

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