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CVE-2019-6470

28
FAUCET Score

CVE-2019-6470 describes a bug in ISC dhcpd versions prior to 4.4.1 when used with specific BIND library versions (9.11.2 or later, or backported fixes), leading to a high probability of crashing the dhcpd service in DHCPv6 mode. This vulnerability primarily affects third-party repackagings of ISC software that modified the source or version matchups. With a CVSS score of 7.5 (High), it is a network-exploitable vulnerability with low attack complexity, requiring no user interaction or privileges, and resulting in high availability impact. There is no evidence of active exploitation, public exploit code, or significant community discussion, and it is not listed in CISA's KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.4.1CPE matchmatch criteria
cpe:2.3:a:isc:dhcpd:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
8.1CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_eus:8.1:*:*:*:*:*:*:*
8.2CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_eus:8.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
8.81%
Probability of exploitation in next 30 days
EPSS Percentile
94.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0881 is in the 91st percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (147)

microsoftpatch availablevia msrc
Product: bind-utils-9.19.21-1.azl3.aarch64.rpm on Azure Linux 3.0 ARMFixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: 17072-16823Fixed in: 9.16.15-3
microsoftpatch availablevia msrc
Product: 17073-16817Fixed in: 9.16.44-2
microsoftpatch availablevia msrc
Product: 17073-17084Fixed in: 9.16.44-2
microsoftpatch availablevia msrc
Product: 20269-17084Fixed in: 9.16.44-2
microsoftpatch availablevia msrc
Product: 13728-12140Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13729-12140Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13730-12140Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13703-12138Fixed in: 9.16.15-1
microsoftpatch availablevia msrc
Product: 13704-12138Fixed in: 9.16.15-1
microsoftpatch availablevia msrc
Product: 13705-12139Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13741-12356Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: 13742-12356Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: 13743-12356Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: 13744-12356Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: 13745-12356Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: 13746-12356Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: 13747-12356Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: 13748-12356Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: 13749-12356Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: 13750-12356Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: 13751-12357Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: 13752-12357Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: 13753-12357Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: 13754-12357Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: 13755-12357Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: python3-bind-9.19.21-1.azl3.noarch.rpm on Azure Linux 3.0 ARMFixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: 17071-16820Fixed in: 9.16.15-1
microsoftpatch availablevia msrc
Product: cm1 bind 9.16.15-1 on CBL Mariner 1.0Fixed in: 9.16.15-1
microsoftpatch availablevia msrc
Product: cbl2 bind 9.16.15-3 on CBL Mariner 2.0Fixed in: 9.16.15-3
microsoftpatch availablevia msrc
Product: azl3 bind 9.16.44-2 on Azure Linux 3.0Fixed in: 9.16.44-2
microsoftpatch availablevia msrc
Product: azl3 bind 9.20.5-4 on Azure Linux 3.0Fixed in: 9.16.44-2
microsoftpatch availablevia msrc
Product: 13701-12137Fixed in: 9.16.15-1
microsoftpatch availablevia msrc
Product: 13702-12137Fixed in: 9.16.15-1
microsoftpatch availablevia msrc
Product: 13706-12139Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13707-12139Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13708-12139Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13709-12139Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13710-12139Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13711-12139Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13712-12139Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13713-12139Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13714-12139Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13715-12139Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13716-12139Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13717-12139Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13718-12139Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13719-12139Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13720-12139Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13721-12139Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13722-12139Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13723-12140Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13724-12140Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13725-12140Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13726-12140Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13727-12140Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13731-12140Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13732-12140Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13715-12140Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13733-12140Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13734-12140Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13735-12140Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13719-12140Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13720-12140Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13736-12140Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13737-12140Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: 13738-12356Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: 13739-12356Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: 13740-12356Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: 13756-12357Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: 13744-12357Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: 13757-12357Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: 13758-12357Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: 13759-12357Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: 13748-12357Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: 13749-12357Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: 13760-12357Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 x64Fixed in: 9.16.15-1
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 ARMFixed in: 9.16.15-1
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 9.16.15-3
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 9.16.15-3
microsoftpatch availablevia msrc
Product: bind-utils-9.16.15-1.cm1.x86_64.rpm on CBL Mariner 1.0 x64Fixed in: 9.16.15-1
microsoftpatch availablevia msrc
Product: bind-debuginfo-9.16.15-1.cm1.x86_64.rpm on CBL Mariner 1.0 x64Fixed in: 9.16.15-1
microsoftpatch availablevia msrc
Product: bind-utils-9.16.15-1.cm1.aarch64.rpm on CBL Mariner 1.0 ARMFixed in: 9.16.15-1
microsoftpatch availablevia msrc
Product: bind-debuginfo-9.16.15-1.cm1.aarch64.rpm on CBL Mariner 1.0 ARMFixed in: 9.16.15-1
microsoftpatch availablevia msrc
Product: bind-9.16.15-4.cm2.x86_64.rpm on CBL Mariner 2.0 x64Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-dlz-filesystem-9.16.15-4.cm2.x86_64.rpm on CBL Mariner 2.0 x64Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-dlz-ldap-9.16.15-4.cm2.x86_64.rpm on CBL Mariner 2.0 x64Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-dlz-mysql-9.16.15-4.cm2.x86_64.rpm on CBL Mariner 2.0 x64Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-dlz-sqlite3-9.16.15-4.cm2.x86_64.rpm on CBL Mariner 2.0 x64Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-pkcs11-9.16.15-4.cm2.x86_64.rpm on CBL Mariner 2.0 x64Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-pkcs11-utils-9.16.15-4.cm2.x86_64.rpm on CBL Mariner 2.0 x64Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-pkcs11-libs-9.16.15-4.cm2.x86_64.rpm on CBL Mariner 2.0 x64Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-pkcs11-devel-9.16.15-4.cm2.x86_64.rpm on CBL Mariner 2.0 x64Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-libs-9.16.15-4.cm2.x86_64.rpm on CBL Mariner 2.0 x64Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-license-9.16.15-4.cm2.noarch.rpm on CBL Mariner 2.0 x64Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-devel-9.16.15-4.cm2.x86_64.rpm on CBL Mariner 2.0 x64Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-chroot-9.16.15-4.cm2.x86_64.rpm on CBL Mariner 2.0 x64Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-dnssec-utils-9.16.15-4.cm2.x86_64.rpm on CBL Mariner 2.0 x64Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-dnssec-doc-9.16.15-4.cm2.noarch.rpm on CBL Mariner 2.0 x64Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: python3-bind-9.16.15-4.cm2.noarch.rpm on CBL Mariner 2.0 x64Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-utils-9.16.15-4.cm2.x86_64.rpm on CBL Mariner 2.0 x64Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-debuginfo-9.16.15-4.cm2.x86_64.rpm on CBL Mariner 2.0 x64Fixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-9.16.15-4.cm2.aarch64.rpm on CBL Mariner 2.0 ARMFixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-dlz-filesystem-9.16.15-4.cm2.aarch64.rpm on CBL Mariner 2.0 ARMFixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-dlz-ldap-9.16.15-4.cm2.aarch64.rpm on CBL Mariner 2.0 ARMFixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-dlz-mysql-9.16.15-4.cm2.aarch64.rpm on CBL Mariner 2.0 ARMFixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-dlz-sqlite3-9.16.15-4.cm2.aarch64.rpm on CBL Mariner 2.0 ARMFixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-pkcs11-9.16.15-4.cm2.aarch64.rpm on CBL Mariner 2.0 ARMFixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-pkcs11-utils-9.16.15-4.cm2.aarch64.rpm on CBL Mariner 2.0 ARMFixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-pkcs11-libs-9.16.15-4.cm2.aarch64.rpm on CBL Mariner 2.0 ARMFixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-pkcs11-devel-9.16.15-4.cm2.aarch64.rpm on CBL Mariner 2.0 ARMFixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-libs-9.16.15-4.cm2.aarch64.rpm on CBL Mariner 2.0 ARMFixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-license-9.16.15-4.cm2.noarch.rpm on CBL Mariner 2.0 ARMFixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-devel-9.16.15-4.cm2.aarch64.rpm on CBL Mariner 2.0 ARMFixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-chroot-9.16.15-4.cm2.aarch64.rpm on CBL Mariner 2.0 ARMFixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-dnssec-utils-9.16.15-4.cm2.aarch64.rpm on CBL Mariner 2.0 ARMFixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-dnssec-doc-9.16.15-4.cm2.noarch.rpm on CBL Mariner 2.0 ARMFixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: python3-bind-9.16.15-4.cm2.noarch.rpm on CBL Mariner 2.0 ARMFixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-utils-9.16.15-4.cm2.aarch64.rpm on CBL Mariner 2.0 ARMFixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-debuginfo-9.16.15-4.cm2.aarch64.rpm on CBL Mariner 2.0 ARMFixed in: 9.16.15-4
microsoftpatch availablevia msrc
Product: bind-9.19.21-1.azl3.x86_64.rpm on Azure Linux 3.0 x64Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: bind-dlz-filesystem-9.19.21-1.azl3.x86_64.rpm on Azure Linux 3.0 x64Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: bind-dlz-ldap-9.19.21-1.azl3.x86_64.rpm on Azure Linux 3.0 x64Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: bind-dlz-mysql-9.19.21-1.azl3.x86_64.rpm on Azure Linux 3.0 x64Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: bind-dlz-sqlite3-9.19.21-1.azl3.x86_64.rpm on Azure Linux 3.0 x64Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: bind-libs-9.19.21-1.azl3.x86_64.rpm on Azure Linux 3.0 x64Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: bind-license-9.19.21-1.azl3.noarch.rpm on Azure Linux 3.0 x64Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: bind-devel-9.19.21-1.azl3.x86_64.rpm on Azure Linux 3.0 x64Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: bind-chroot-9.19.21-1.azl3.x86_64.rpm on Azure Linux 3.0 x64Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: bind-dnssec-utils-9.19.21-1.azl3.x86_64.rpm on Azure Linux 3.0 x64Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: bind-dnssec-doc-9.19.21-1.azl3.noarch.rpm on Azure Linux 3.0 x64Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: python3-bind-9.19.21-1.azl3.noarch.rpm on Azure Linux 3.0 x64Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: bind-utils-9.19.21-1.azl3.x86_64.rpm on Azure Linux 3.0 x64Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: bind-9.19.21-1.azl3.aarch64.rpm on Azure Linux 3.0 ARMFixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: bind-dlz-filesystem-9.19.21-1.azl3.aarch64.rpm on Azure Linux 3.0 ARMFixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: bind-dlz-ldap-9.19.21-1.azl3.aarch64.rpm on Azure Linux 3.0 ARMFixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: bind-dlz-mysql-9.19.21-1.azl3.aarch64.rpm on Azure Linux 3.0 ARMFixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: bind-dlz-sqlite3-9.19.21-1.azl3.aarch64.rpm on Azure Linux 3.0 ARMFixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: bind-libs-9.19.21-1.azl3.aarch64.rpm on Azure Linux 3.0 ARMFixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: bind-license-9.19.21-1.azl3.noarch.rpm on Azure Linux 3.0 ARMFixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: bind-devel-9.19.21-1.azl3.aarch64.rpm on Azure Linux 3.0 ARMFixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: bind-chroot-9.19.21-1.azl3.aarch64.rpm on Azure Linux 3.0 ARMFixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: bind-dnssec-utils-9.19.21-1.azl3.aarch64.rpm on Azure Linux 3.0 ARMFixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: bind-dnssec-doc-9.19.21-1.azl3.noarch.rpm on Azure Linux 3.0 ARMFixed in: 9.19.21-1
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: dhcp-12:4.2.5-77.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: dhcp-12:4.3.6-34.el8
View patch

Vendor Advisories (4)

microsoft2024-Jun/CVE-2019-6470

CVE-2019-6470

Jun 11, 2024
microsoft2021-Dec/CVE-2019-6470

CVE-2019-6470

Dec 14, 2021
microsoft2019-Nov/CVE-2019-6470Important

dhcpd: use-after-free error leads crash in IPv6 mode when using mismatched BIND libraries

Nov 12, 2019
redhatCVE-2019-6470Moderate

dhcp: double-deletion of the released addresses in the dhcpv6 code leading to crash and possible DoS

Jul 14, 2018

References

access.redhat.com / errata/RHSA-2019:2060
Third Party Advisory
access.redhat.com / errata/RHSA-2019:3525
Third Party Advisory
bugs.debian.org / cgi-bin/bugreport.cgi
ExploitMailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2019-10/msg00048.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2019-10/msg00049.html
Mailing ListThird Party Advisory