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NVD Vulnerability Details :
CVE-2026-4891
Awaiting Analysis
More InfoOfficial Page
Source-cret@cert.org
View Known Exploited Vulnerability (KEV) details
Published At-11 May, 2026 | 18:16
Updated At-30 Jun, 2026 | 03:20

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.15.3MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Secondary3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
N/A
Type: Secondary
Version: 3.1
Base score: 5.3
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Type: Secondary
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Type: N/A
Version:
Base score:
Base severity: N/A
Vector:
CPE Matches
Weaknesses
CWE IDTypeSource
CWE-125Secondary0b0ca135-0b70-47e7-9f44-1890c2a1c46c
CWE ID: CWE-125
Type: Secondary
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/NixOS/nixpkgs/pull/519082cret@cert.org
N/A
https://github.com/NixOS/nixpkgs/pull/519093cret@cert.org
N/A
https://github.com/pi-hole/FTL/releases/tag/v6.6.2cret@cert.org
N/A
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.htmlcret@cert.org
N/A
https://thekelleys.org.uk/dnsmasq/CVE/cret@cert.org
N/A
https://www.kb.cert.org/vuls/id/471747cret@cert.org
N/A
https://access.redhat.com/errata/RHSA-2026:191580b0ca135-0b70-47e7-9f44-1890c2a1c46c
N/A
https://access.redhat.com/errata/RHSA-2026:193730b0ca135-0b70-47e7-9f44-1890c2a1c46c
N/A
https://access.redhat.com/errata/RHSA-2026:205890b0ca135-0b70-47e7-9f44-1890c2a1c46c
N/A
https://access.redhat.com/security/cve/CVE-2026-48910b0ca135-0b70-47e7-9f44-1890c2a1c46c
N/A
https://bugzilla.redhat.com/show_bug.cgi?id=24585170b0ca135-0b70-47e7-9f44-1890c2a1c46c
N/A
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4891.json0b0ca135-0b70-47e7-9f44-1890c2a1c46c
N/A
Hyperlink: https://github.com/NixOS/nixpkgs/pull/519082
Source: cret@cert.org
Resource: N/A
Hyperlink: https://github.com/NixOS/nixpkgs/pull/519093
Source: cret@cert.org
Resource: N/A
Hyperlink: https://github.com/pi-hole/FTL/releases/tag/v6.6.2
Source: cret@cert.org
Resource: N/A
Hyperlink: https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html
Source: cret@cert.org
Resource: N/A
Hyperlink: https://thekelleys.org.uk/dnsmasq/CVE/
Source: cret@cert.org
Resource: N/A
Hyperlink: https://www.kb.cert.org/vuls/id/471747
Source: cret@cert.org
Resource: N/A
Hyperlink: https://access.redhat.com/errata/RHSA-2026:19158
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Resource: N/A
Hyperlink: https://access.redhat.com/errata/RHSA-2026:19373
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Resource: N/A
Hyperlink: https://access.redhat.com/errata/RHSA-2026:20589
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Resource: N/A
Hyperlink: https://access.redhat.com/security/cve/CVE-2026-4891
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Resource: N/A
Hyperlink: https://bugzilla.redhat.com/show_bug.cgi?id=2458517
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Resource: N/A
Hyperlink: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4891.json
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Resource: N/A
Change History
0Changes found
Details not found