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Vulnerability from cleanstart
Published
2026-09-04 00:59
Modified
2026-09-03 10:27
Summary
dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-...
Details
Multiple security vulnerabilities affect the dnsmasq package. dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP address, or to cause a DoS. See references for individual vulnerability details.
Severity
9.8 (Critical)
References
{
"affected": [
{
"package": {
"ecosystem": "CleanStart",
"name": "dnsmasq"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.92_p2-r0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"credits": [],
"database_specific": {},
"details": "Multiple security vulnerabilities affect the dnsmasq package. dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP address, or to cause a DoS. See references for individual vulnerability details.",
"id": "CLEANSTART-2026-KY78316",
"modified": "2026-09-03T10:27:17Z",
"published": "2026-09-04T00:59:50.930698Z",
"references": [
{
"type": "ADVISORY",
"url": "https://github.com/cleanstart-dev/cleanstart-security-advisories/tree/main/advisories/2026/CLEANSTART-2026-KY78316.json"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2017-13704"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2017-14491"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2017-14492"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2017-14493"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2017-14494"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2017-14495"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2017-14496"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2017-15107"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2019-14834"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2020-25681"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2020-25682"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2020-25683"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2020-25684"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2020-25685"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2020-25686"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2020-25687"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2021-3448"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2022-0934"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2023-28450"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2023-50387"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2023-50868"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-2291"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-4890"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-4891"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-4892"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-4893"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-5172"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-13704"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-14491"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-14492"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-14493"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-14494"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-14495"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-14496"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-15107"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-14834"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-25681"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-25682"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-25683"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-25684"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-25685"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-25686"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-25687"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-3448"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-0934"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-28450"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-50387"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-50868"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-2291"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4890"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4891"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4892"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4893"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-5172"
}
],
"related": [],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-...",
"upstream": [
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"CVE-2017-14491",
"CVE-2017-14492",
"CVE-2017-14493",
"CVE-2017-14494",
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"CVE-2017-14496",
"CVE-2017-15107",
"CVE-2019-14834",
"CVE-2020-25681",
"CVE-2020-25682",
"CVE-2020-25683",
"CVE-2020-25684",
"CVE-2020-25685",
"CVE-2020-25686",
"CVE-2020-25687",
"CVE-2021-3448",
"CVE-2022-0934",
"CVE-2023-28450",
"CVE-2023-50387",
"CVE-2023-50868",
"CVE-2026-2291",
"CVE-2026-4890",
"CVE-2026-4891",
"CVE-2026-4892",
"CVE-2026-4893",
"CVE-2026-5172"
]
}
CVE-2023-50868 (GCVE-0-2023-50868)
Vulnerability from cvelistv5 – Published: 2024-02-14 00:00 – Updated: 2025-11-04 18:20
VLAI
EPSS
VEX
Summary
The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC responses in a random subdomain attack, aka the "NSEC3" issue. The RFC 5155 specification implies that an algorithm must perform thousands of iterations of a hash function in certain situations.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-02-19 20:27 UTC
CWE
- n/a
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
29 references
| URL | Tags |
|---|---|
| https://nlnetlabs.nl/news/2024/Feb/13/unbound-1.1… | |
| https://docs.powerdns.com/recursor/security-advis… | |
| https://www.isc.org/blogs/2024-bind-security-release/ | |
| https://datatracker.ietf.org/doc/html/rfc5155 | |
| https://kb.isc.org/docs/cve-2023-50868 | |
| https://gitlab.nic.cz/knot/knot-resolver/-/releas… | |
| https://lists.thekelleys.org.uk/pipermail/dnsmasq… | |
| https://access.redhat.com/security/cve/CVE-2023-50868 | |
| https://bugzilla.suse.com/show_bug.cgi?id=1219826 | |
| http://www.openwall.com/lists/oss-security/2024/02/16/2 | mailing-list |
| http://www.openwall.com/lists/oss-security/2024/02/16/3 | mailing-list |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisory |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisory |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisory |
| https://lists.debian.org/debian-lts-announce/2024… | mailing-list |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisory |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisory |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisory |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisory |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisory |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisory |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisory |
| https://security.netapp.com/advisory/ntap-2024030… | |
| https://lists.debian.org/debian-lts-announce/2024… | mailing-list |
| https://lists.debian.org/debian-lts-announce/2024… | |
| https://lists.debian.org/debian-lts-announce/2024… | |
| https://lists.fedoraproject.org/archives/list/pac… | |
| https://lists.fedoraproject.org/archives/list/pac… | |
| https://lists.fedoraproject.org/archives/list/pac… |
{
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"title": "CVE Program Container"
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"metrics": [
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"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
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CVE-2026-2291 (GCVE-0-2026-2291)
Vulnerability from cvelistv5 – Published: 2026-05-11 16:47 – Updated: 2026-07-20 20:30
VLAI
EPSS
VEX
Title
CVE-2026-2291
Summary
dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP address, or to cause a DoS.
Severity
7.3 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-13 12:38 UTC
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://www.suse.com/security/cve/CVE-2026-2291.html | |
| https://www.kb.cert.org/vuls/id/471747 | |
| https://thekelleys.org.uk/dnsmasq/CVE/ | |
| https://lists.thekelleys.org.uk/pipermail/dnsmasq… | |
| https://github.com/NixOS/nixpkgs/pull/519082 | |
| https://github.com/NixOS/nixpkgs/pull/519093 | |
| https://github.com/pi-hole/FTL/releases/tag/v6.6.2 | |
| http://www.openwall.com/lists/oss-security/2026/0… |
Impacted products
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CVE-2026-4890 (GCVE-0-2026-4890)
Vulnerability from cvelistv5 – Published: 2026-05-11 16:47 – Updated: 2026-09-01 12:05
VLAI
EPSS
VEX
Title
CVE-2026-4890
Summary
A Denial of Service (DoS) vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-11 18:28 UTC
CWE
Assigner
References
14 references
| URL | Tags |
|---|---|
| https://www.kb.cert.org/vuls/id/471747 | |
| https://lists.thekelleys.org.uk/pipermail/dnsmasq… | |
| https://thekelleys.org.uk/dnsmasq/CVE/ | |
| https://github.com/NixOS/nixpkgs/pull/519093 | |
| https://github.com/NixOS/nixpkgs/pull/519082 | |
| https://github.com/pi-hole/FTL/releases/tag/v6.6.2 | |
| https://access.redhat.com/security/cve/CVE-2026-4890 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2458516 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:40762 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:19158 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:20589 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:34508 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:19373 | vendor-advisoryx_refsource_REDHAT |
Impacted products
8 products
| Vendor | Product | Version | |
|---|---|---|---|
| dnsmasq | dnsmasq |
Affected:
0 , < 2.92rel2
(custom)
|
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:2.90-7.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:2.79-36.el8_10 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:2.85-18.el9_8.1 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support |
Unaffected:
0:2.85-17.el9_6.1 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.6 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.19 |
Unaffected:
4.19.9.6.202607151909-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.19::el9 |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
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CVE-2026-4891 (GCVE-0-2026-4891)
Vulnerability from cvelistv5 – Published: 2026-05-11 16:47 – Updated: 2026-09-01 12:04
VLAI
EPSS
VEX
Title
CVE-2026-4891
Summary
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.
Severity
5.3 (Medium)
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-11 18:27 UTC
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
14 references
| URL | Tags |
|---|---|
| https://lists.thekelleys.org.uk/pipermail/dnsmasq… | |
| https://www.kb.cert.org/vuls/id/471747 | |
| https://thekelleys.org.uk/dnsmasq/CVE/ | |
| https://github.com/NixOS/nixpkgs/pull/519082 | |
| https://github.com/NixOS/nixpkgs/pull/519093 | |
| https://github.com/pi-hole/FTL/releases/tag/v6.6.2 | |
| https://access.redhat.com/security/cve/CVE-2026-4891 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2458517 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:40762 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:19158 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:20589 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:34508 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:19373 | vendor-advisoryx_refsource_REDHAT |
Impacted products
8 products
| Vendor | Product | Version | |
|---|---|---|---|
| dnsmasq | dnsmasq |
Affected:
0 , < 2.92rel2
(custom)
|
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:2.90-7.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:2.79-36.el8_10 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:2.85-18.el9_8.1 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support |
Unaffected:
0:2.85-17.el9_6.1 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.6 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.19 |
Unaffected:
4.19.9.6.202607151909-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.19::el9 |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
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CVE-2026-4892 (GCVE-0-2026-4892)
Vulnerability from cvelistv5 – Published: 2026-05-11 16:47 – Updated: 2026-09-01 12:04
VLAI
EPSS
VEX
Title
CVE-2026-4892
Summary
A heap-based out-of-bounds write vulnerability in the DHCPv6 implementation of dnsmasq allows local attackers to execute arbitrary code with root privileges via a crafted DHCPv6 packet.
Severity
8.4 (High)
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-11 18:26 UTC
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
14 references
| URL | Tags |
|---|---|
| https://lists.thekelleys.org.uk/pipermail/dnsmasq… | |
| https://www.kb.cert.org/vuls/id/471747 | |
| https://thekelleys.org.uk/dnsmasq/CVE/ | |
| https://github.com/NixOS/nixpkgs/pull/519082 | |
| https://github.com/NixOS/nixpkgs/pull/519093 | |
| https://github.com/pi-hole/FTL/releases/tag/v6.6.2 | |
| https://access.redhat.com/security/cve/CVE-2026-4892 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2458518 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:40762 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:19158 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:20589 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:34508 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:19373 | vendor-advisoryx_refsource_REDHAT |
Impacted products
8 products
| Vendor | Product | Version | |
|---|---|---|---|
| dnsmasq | dnsmasq |
Affected:
0 , < 2.92rel2
(custom)
|
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:2.90-7.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:2.79-36.el8_10 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:2.85-18.el9_8.1 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support |
Unaffected:
0:2.85-17.el9_6.1 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.6 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.19 |
Unaffected:
4.19.9.6.202607151909-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.19::el9 |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
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CVE-2026-4893 (GCVE-0-2026-4893)
Vulnerability from cvelistv5 – Published: 2026-05-11 16:48 – Updated: 2026-05-20 14:09
VLAI
EPSS
VEX
Title
CVE-2026-4893
Summary
An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-11 18:28 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
Impacted products
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CVE-2026-5172 (GCVE-0-2026-5172)
Vulnerability from cvelistv5 – Published: 2026-05-11 16:48 – Updated: 2026-09-01 12:04
VLAI
EPSS
VEX
Title
CVE-2026-5172
Summary
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.
Severity
7.3 (High)
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-13 12:47 UTC
Assigner
References
10 references
| URL | Tags |
|---|---|
| https://www.kb.cert.org/vuls/id/471747 | |
| https://lists.thekelleys.org.uk/pipermail/dnsmasq… | |
| https://thekelleys.org.uk/dnsmasq/CVE/ | |
| https://github.com/NixOS/nixpkgs/pull/519082 | |
| https://github.com/NixOS/nixpkgs/pull/519093 | |
| https://github.com/pi-hole/FTL/releases/tag/v6.6.2 | |
| https://access.redhat.com/security/cve/CVE-2026-5172 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2458521 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:19158 | vendor-advisoryx_refsource_REDHAT |
Impacted products
7 products
| Vendor | Product | Version | |
|---|---|---|---|
| dnsmasq | dnsmasq |
Affected:
0 , < 2.92rel2
(custom)
|
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:2.90-7.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9
|
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4
|
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Loading…
Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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