CVE-2026-4891

Published May 11, 2026

Last updated a day ago

CVSS medium 5.3
Dns
Port (53)

Overview

Description
A heap-based out-of-bounds read vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet.
Source
cret@cert.org
NVD status
Awaiting Analysis

Risk scores

CVSS 3.1

Type
Secondary
Base score
5.3
Impact score
1.4
Exploitability score
3.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Severity
MEDIUM

Weaknesses

0b0ca135-0b70-47e7-9f44-1890c2a1c46c
CWE-125

Social media

Hype score
Not currently trending

  1. 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

    @__kokumoto

    13 May 2026

    959 Impressions

    1 Retweet

    4 Likes

    2 Bookmarks

    0 Replies

    0 Quotes

Related CVEs

  1. Numeric truncation error in Windows DNS allows an authorized attacker to elevate privileges locally.•CVE-2026-65797
  2. Use after free in Windows DNS allows an unauthorized attacker to execute code over a network.•CVE-2026-65789
  3. Stack-based buffer overflow in Windows DNS allows an unauthorized attacker to execute code over a network.•CVE-2026-62878
  4. Concurrent execution using shared resource with improper synchronization ('race condition') in Windows DNS allows an unauthorized attacker to execute code over a network.•CVE-2026-62820
  5. Out-of-bounds write in Windows DNS allows an unauthorized attacker to execute code over an adjacent network.•CVE-2026-62817

References

Sources include official advisories and independent security research.