VulnSocial

CVE-2026-5172Disclosure

LOWCVSS 7.3 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch affected systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD 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.

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0.5/ 10 priority

Sources & remediation

Other references
Weakness type (CWE)
CWE-125

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Threat summary

  • Patch or workaround signal is available
  • 2 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 2 signals
  • Disclosure: 1 classified signal
  • Peaked 1d ago at 1 mentions (2026-05-11); latest day: 1
  • 2 total mentions across 2 days

Deep dive

Activity timeline2 mentions / 2d
00111Mentions · 2026-05-11: 1Mentions · 2026-05-27: 1Patch / Workaround · 2026-05-27: 1Technical Details · 2026-05-11: 1Technical Details · 2026-05-27: 105-1105-27
Signal classification2 categories
Disclosure
150.0%
Patch
150.0%
Referenced assets2 URLs
Classification over time
DateTotalLabels
2026-05-111
Disclosure1
2026-05-271
Patch1
Full discourse2 posts
  • WindowsForum@windowsforum
    Patch

    🚨 CVE-2026-5172: dnsmasq heap out-of-bounds from bad DNS answers = “the internet ate your resolver.” This matters because Windows teams still depend on DNS quietly. Patch fast. #Windows #Security #DNS https://windowsforum.com/threads/cve-2026-5172-dnsmasq-heap-crash-windows-teams-should-patch-dns-dependencies.420064/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #WindowsNetworking #InfrastructureSecurity https://t.co/WUdaAJVHwT

    Post summary

    The post announces the CVE‑2026‑5172 heap out‑of‑bounds vulnerability in dnsmasq, emphasizes that Windows teams still rely on DNS, and urges an urgent patch.

    0000053
    1.1K followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-5172 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, en… https://www.cve.org/CVERecord?id=CVE-2026-5172

    Post summary

    The text discloses a buffer overflow vulnerability in dnsmasq that enables heap out‑of‑bounds reads and crashes when parsing malformed DNS responses.

    0000082
    57.5K followersView on X

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