VulnSocial

CVE-2026-4893Disclosure

LOWCVSS 5.3 · MEDIUM

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

An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information.

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0.5/ 10 priority

Sources & remediation

Other references

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Threat summary

  • Patch or workaround signal is available
  • 3 mentions across 3 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 3 signals
  • Disclosure: 2 classified signals
  • Peaked 2d ago at 1 mentions (2026-05-11); latest day: 1
  • 3 total mentions across 3 days

Deep dive

Activity timeline3 mentions / 3d
00111Mentions · 2026-05-11: 1Mentions · 2026-05-13: 1Mentions · 2026-05-27: 1Patch / Workaround · 2026-05-27: 1Technical Details · 2026-05-11: 1Technical Details · 2026-05-13: 1Technical Details · 2026-05-27: 105-1105-1305-27
Signal classification2 categories
Disclosure
266.7%
Patch
133.3%
Referenced assets3 URLs
Classification over time
DateTotalLabels
2026-05-111
Disclosure1
2026-05-131
Disclosure1
2026-05-271
Patch1
Full discourse3 posts
  • kokumօtօ@__kokumoto
    Disclosure

    Dnsmasqに複数のメモリ脆弱性。CVE-2026-2291, CVE-2026-4890, CVE-2026-4891, CVE-2026-4892, CVE-2026-4893, CVE-2026-5172の6件。CVE-2026-4892はDHCPv6パケットでのroot権限任意コード実行。他の影響はキャッシュポイズニング、DoS、情報漏洩。 https://securityonline.info/multiple-memory-flaws-in-dnsmasq-threaten-millions-of-connected-devices/

    Post summary

    Six memory‑related vulnerabilities disclosed for dnsmasq, including one that allows root privilege escalation via DHCPv6; additional CVEs pose cache poisoning, DoS, and information leakage risks.

    010521.2K
    7.6K followersView on X
  • WindowsForum@windowsforum
    Patch

    🪟 CVE-2026-4893 is “medium” severity, aka the sneaky leak. DNS is the back door to everything—patching dnsmasq still matters for Windows teams running mixed networks. #Windows #Security https://windowsforum.com/threads/cve-2026-4893-dnsmasq-dns-info-leak-why-windows-teams-still-must-patch.420058/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #WindowsSecurity #VulnerabilityManagement #Dnsmasq #EdnsClientSubnet https://t.co/HKidYkFDZa

    Post summary

    The tweet warns that CVE‑2026‑4893 is a medium‑severity DNS information leak affecting dnsmasq, and stresses that Windows teams should still patch dnsmasq, despite no active exploitation or PoC being reported.

    00000102
    1.1K followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-4893 An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information. https://www.cve.org/CVERecord?id=CVE-2026-4893

    Post summary

    The post announces an information‑disclosure flaw in dnsmasq, noting that remote attackers can bypass source checks with a crafted DNS packet that includes RFC 7871 client subnet information.

    00000100
    57.5K followersView on X

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