# CVE-2023-28450: dnsmasq: This update for dnsmasq fixes the following issues: - Version update to 2.90: - CVE-2023-50387: Fixed a Denial Of Se... CVE-2023-28450 is fixed in 7 products on 1 platform, first by dnsmasq 2.79-1ubuntu0.7, released March 15, 2023. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2023-28450 - Priority: High - CVSS: 7.5 (Moderate) - EPSS: 0.0184 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Mar 15, 2023 ## Description This update for dnsmasq fixes the following issues: - Version update to 2.90: - CVE-2023-50387: Fixed a Denial Of Service while trying to validate specially crafted DNSSEC responses. (bsc#1219823) - CVE-2023-50868: Fixed a Denial Of Service while trying to validate specially crafted DNSSEC responses. (bsc#1219826) - CVE-2023-28450: Default maximum EDNS.0 UDP packet size should be 1232. (bsc#1209358) ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | dnsmasq Debian 12.15 (bookworm) | 2.90-4~deb12u1 | [DEBIAN-CVE-2023-28450](https://patchblox.com/security/data/fix/linux/debian-cve-2023-28450.md) | Mar 15, 2023 | | Linux | dnsmasq Debian 13.5 (trixie) | 2.90-1 | [DEBIAN-CVE-2023-28450](https://patchblox.com/security/data/fix/linux/debian-cve-2023-28450.md) | Mar 15, 2023 | | Linux | dnsmasq Debian 14 | 2.90-1 | [DEBIAN-CVE-2023-28450](https://patchblox.com/security/data/fix/linux/debian-cve-2023-28450.md) | Mar 15, 2023 | | Linux | dnsmasq RHEL 8 | 0:2.79-31.el8 | [RHSA-2023:7046](https://patchblox.com/security/data/fix/linux/rhsa-2023-7046.md) | Nov 14, 2023 | | Linux | dnsmasq RHEL 9 | 0:2.85-14.el9 | [RHSA-2023:6524](https://patchblox.com/security/data/fix/linux/rhsa-2023-6524.md) | Nov 7, 2023 | | Linux | dnsmasq Ubuntu 18.04.6 LTS (bionic) | 2.79-1ubuntu0.7 | [dnsmasq 2.79-1ubuntu0.7](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-dnsmasq-2.79-1ubuntu0.7.md) | Mar 15, 2023 | | Linux | dnsmasq Ubuntu 20.04 LTS (focal) | 2.80-1.1ubuntu1.7 | [dnsmasq 2.80-1.1ubuntu1.7](https://patchblox.com/security/data/fix/linux/ubuntu-focal-dnsmasq-2.80-1.1ubuntu1.7.md) | Mar 15, 2023 | | Linux | dnsmasq Ubuntu 22.04.1 LTS (jammy) | 2.86-1.1ubuntu0.3 | [dnsmasq 2.86-1.1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-dnsmasq-2.86-1.1ubuntu0.3.md) | Mar 15, 2023 | | Linux | dnsmasq almalinux 8 | 2.79-31.el8 | [ALSA-2023:7046](https://patchblox.com/security/data/fix/linux/alsa-2023-7046.md) | Nov 14, 2023 | | Linux | dnsmasq almalinux 9 | 2.85-14.el9 | [ALSA-2023:6524](https://patchblox.com/security/data/fix/linux/alsa-2023-6524.md) | Nov 7, 2023 | | Linux | dnsmasq amzn 2023 | 2.86-10.amzn2023.0.3 | [ALAS2023-2023-192](https://patchblox.com/security/data/fix/linux/alas2023-2023-192.md) | Jun 5, 2023 | | Linux | dnsmasq ol 8 | 0:2.79-31.el8 | [ELSA-2023-7046](https://patchblox.com/security/data/fix/linux/elsa-2023-7046.md) | Nov 17, 2023 | | Linux | dnsmasq ol 9 | 0:2.85-14.el9 | [ELSA-2023-6524](https://patchblox.com/security/data/fix/linux/elsa-2023-6524.md) | Nov 11, 2023 | | Linux | dnsmasq opensuse-leap 15.6 | 2.90-150400.16.3.1 | [SUSE-SU-2025:0071-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0071-1.md) | Jan 10, 2025 | | Linux | dnsmasq sles 15.6 | 2.90-150400.16.3.1 | [SUSE-SU-2025:0071-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0071-1.md) | Jan 10, 2025 | | Linux | dnsmasq-base Ubuntu 18.04.6 LTS (bionic) | 2.79-1ubuntu0.7 | [dnsmasq-base 2.79-1ubuntu0.7](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-dnsmasq-base-2.79-1ubuntu0.7.md) | Mar 15, 2023 | | Linux | dnsmasq-base Ubuntu 20.04 LTS (focal) | 2.80-1.1ubuntu1.7 | [dnsmasq-base 2.80-1.1ubuntu1.7](https://patchblox.com/security/data/fix/linux/ubuntu-focal-dnsmasq-base-2.80-1.1ubuntu1.7.md) | Mar 15, 2023 | | Linux | dnsmasq-base Ubuntu 22.04.1 LTS (jammy) | 2.86-1.1ubuntu0.3 | [dnsmasq-base 2.86-1.1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-dnsmasq-base-2.86-1.1ubuntu0.3.md) | Mar 15, 2023 | | Linux | dnsmasq-base-lua Ubuntu 18.04.6 LTS (bionic) | 2.79-1ubuntu0.7 | [dnsmasq-base-lua 2.79-1ubuntu0.7](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-dnsmasq-base-lua-2.79-1ubuntu0.7.md) | Mar 15, 2023 | | Linux | dnsmasq-base-lua Ubuntu 20.04 LTS (focal) | 2.80-1.1ubuntu1.7 | [dnsmasq-base-lua 2.80-1.1ubuntu1.7](https://patchblox.com/security/data/fix/linux/ubuntu-focal-dnsmasq-base-lua-2.80-1.1ubuntu1.7.md) | Mar 15, 2023 | | Linux | dnsmasq-base-lua Ubuntu 22.04.1 LTS (jammy) | 2.86-1.1ubuntu0.3 | [dnsmasq-base-lua 2.86-1.1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-dnsmasq-base-lua-2.86-1.1ubuntu0.3.md) | Mar 15, 2023 | | Linux | dnsmasq-debuginfo amzn 2023 | 2.86-10.amzn2023.0.3 | [ALAS2023-2023-192](https://patchblox.com/security/data/fix/linux/alas2023-2023-192.md) | Jun 5, 2023 | | Linux | dnsmasq-debugsource amzn 2023 | 2.86-10.amzn2023.0.3 | [ALAS2023-2023-192](https://patchblox.com/security/data/fix/linux/alas2023-2023-192.md) | Jun 5, 2023 | | Linux | dnsmasq-utils RHEL 8 | 0:2.79-31.el8 | [RHSA-2023:7046](https://patchblox.com/security/data/fix/linux/rhsa-2023-7046.md) | Nov 14, 2023 | | Linux | dnsmasq-utils RHEL 9 | 0:2.85-14.el9 | [RHSA-2023:6524](https://patchblox.com/security/data/fix/linux/rhsa-2023-6524.md) | Nov 7, 2023 | | Linux | dnsmasq-utils Ubuntu 18.04.6 LTS (bionic) | 2.79-1ubuntu0.7 | [dnsmasq-utils 2.79-1ubuntu0.7](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-dnsmasq-utils-2.79-1ubuntu0.7.md) | Mar 15, 2023 | | Linux | dnsmasq-utils Ubuntu 20.04 LTS (focal) | 2.80-1.1ubuntu1.7 | [dnsmasq-utils 2.80-1.1ubuntu1.7](https://patchblox.com/security/data/fix/linux/ubuntu-focal-dnsmasq-utils-2.80-1.1ubuntu1.7.md) | Mar 15, 2023 | | Linux | dnsmasq-utils Ubuntu 22.04.1 LTS (jammy) | 2.86-1.1ubuntu0.3 | [dnsmasq-utils 2.86-1.1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-dnsmasq-utils-2.86-1.1ubuntu0.3.md) | Mar 15, 2023 | | Linux | dnsmasq-utils almalinux 8 | 2.79-31.el8 | [ALSA-2023:7046](https://patchblox.com/security/data/fix/linux/alsa-2023-7046.md) | Nov 14, 2023 | | Linux | dnsmasq-utils almalinux 9 | 2.85-14.el9 | [ALSA-2023:6524](https://patchblox.com/security/data/fix/linux/alsa-2023-6524.md) | Nov 7, 2023 | | Linux | dnsmasq-utils amzn 2023 | 2.86-10.amzn2023.0.3 | [ALAS2023-2023-192](https://patchblox.com/security/data/fix/linux/alas2023-2023-192.md) | Jun 5, 2023 | | Linux | dnsmasq-utils ol 8 | 0:2.79-31.el8 | [ELSA-2023-7046](https://patchblox.com/security/data/fix/linux/elsa-2023-7046.md) | Nov 17, 2023 | | Linux | dnsmasq-utils ol 9 | 0:2.85-14.el9 | [ELSA-2023-6524](https://patchblox.com/security/data/fix/linux/elsa-2023-6524.md) | Nov 11, 2023 | | Linux | dnsmasq-utils-debuginfo amzn 2023 | 2.86-10.amzn2023.0.3 | [ALAS2023-2023-192](https://patchblox.com/security/data/fix/linux/alas2023-2023-192.md) | Jun 5, 2023 | --- Data as of 2026-11-08T19:12:23Z UTC. 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