An issue was discovered in Dnsmasq before 2.90.
Priority MEDIUM 43Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 5 fixed, 3 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.
Summary
An issue was discovered in Dnsmasq before 2.90. The default maximum EDNS.0 UDP packet size was set to 4096 but should be 1232 because of DNS Flag Day 2020.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01838 79th percentileScored 2026-11-07
Fix Partial Red Hat: 5 advisoriesRed Hat: 5 fixed, 3 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:* | before 2.90 | Vulnerable | Thekelleys |
- cpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:* Versions before 2.90 Vulnerable ·Thekelleys
Remediation
Red Hat 5 advisories
- RHSA-2024:4052 Released 2024-06-23 · Red Hat rating Moderatednsmasq security update
- Red Hat Enterprise Linux AppStream EUS (v.9.2) dnsmasq-2.85-6.el9_2.4, dnsmasq-utils-2.85-6.el9_2.4
- RHSA-2024:1545 Released 2024-03-27 · Red Hat rating Importantdnsmasq security update
- Red Hat Enterprise Linux AppStream EUS (v.8.6) dnsmasq-2.79-21.el8_6.5, dnsmasq-utils-2.79-21.el8_6.5
- RHSA-2024:1544 Released 2024-03-27 · Red Hat rating Importantdnsmasq security and bug fix update
- Red Hat Enterprise Linux AppStream EUS (v.8.8) dnsmasq-2.79-26.el8_8.4, dnsmasq-utils-2.79-26.el8_8.4
Show 2 more Red Hat advisories
- RHSA-2023:7046 Released 2023-11-14 · Red Hat rating Moderatednsmasq security and bug fix update
- Red Hat Enterprise Linux AppStream (v. 8) dnsmasq-2.79-31.el8, dnsmasq-utils-2.79-31.el8
- RHSA-2023:6524 Released 2023-11-07 · Red Hat rating Moderatednsmasq security and bug fix update
- Red Hat Enterprise Linux AppStream (v. 9) dnsmasq-2.85-14.el9, dnsmasq-utils-2.85-14.el9
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat OpenStack Platform 13 (Queens) | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2023:7046 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2023:6524 |
| Red Hat Enterprise Linux AppStream EUS (v.8.6) | Fixed | RHSA-2024:1545 |
| Red Hat Enterprise Linux AppStream EUS (v.8.8) | Fixed | RHSA-2024:1544 |
| Red Hat Enterprise Linux AppStream EUS (v.9.2) | Fixed | RHSA-2024:4052 |
Timeline
- 2026-10-02 Threatist record created from CVE-2023-28450
- 2026-10-03 Alias added: GHSA-vgrx-vhjf-p7wv
References
More Thekelleys Dnsmasq vulnerabilities
- TI-2017-10595 Heap-based buffer overflow in dnsmasq before 2.78 allows remote attackers to cause a… CVSS 3.0CRITICAL 9.8
- TI-2023-27571 Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related… CVSS 3.1HIGH 7.5
- TI-2017-10596 Stack-based buffer overflow in dnsmasq before 2.78 allows remote attackers to cause a… CVSS 3.0CRITICAL 9.8
- TI-2017-10594 Heap-based buffer overflow in dnsmasq before 2.78 allows remote attackers to cause a… CVSS 3.1CRITICAL 9.8
- TI-2021-20958 Dnsmasq 2.86 has a heap-based buffer overflow in resize_packet (called from… CVSS 3.1CRITICAL 9.8
- TI-2020-15697 Heap-based buffer overflow in dnsmasq CVSS 3.1HIGH 8.1
Sources
- CVE-2023-28450 · CVE Program
- CVE-2023-28450 · NVD
- FIRST EPSS
- GHSA-vgrx-vhjf-p7wv · GitHub Advisory Database · CC BY 4.0
- CVE-2023-28450 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences