CVE-2026-4893
CVE-2026-4893
CVE-2026-4893 is fixed in 7 products on 1 platform, first by dnsmasq 2.92-1ubuntu0.2, released May 11, 2026. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
8.8
Moderate
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0178
78th percentile
An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| dnsmasq · Debian 12.15 (bookworm) | 2.90-4~deb12u2 | DEBIAN-CVE-2026-4893 | May 15, 2026 |
| dnsmasq · Debian 13.5 (trixie) | 2.91-1+deb13u1 | DEBIAN-CVE-2026-4893 | May 15, 2026 |
| dnsmasq · Debian 14 | 2.92-5 | DEBIAN-CVE-2026-4893 | May 15, 2026 |
| dnsmasq · RHEL 10 | 2.90-4.el10_0.1 | RHSA-2026:92677 | May 27, 2026 |
| dnsmasq · RHEL 8 | 0:2.79-36.el8_10 | RHSA-2026:20589 | May 27, 2026 |
| dnsmasq · RHEL 9 | 0:2.85-18.el9_8.1 | RHSA-2026:19373 | May 27, 2026 |
| dnsmasq · Ubuntu 18.04.6 LTS (bionic) | 2.90-0ubuntu0.18.04.1+esm3 | dnsmasq 2.90-0ubuntu0.18.04.1+esm3 | May 27, 2026 |
| dnsmasq · Ubuntu 20.04 LTS (focal) | 2.90-0ubuntu0.20.04.1+esm2 | dnsmasq 2.90-0ubuntu0.20.04.1+esm2 | May 27, 2026 |
| dnsmasq · Ubuntu 22.04.1 LTS (jammy) | 2.90-0ubuntu0.22.04.3 | dnsmasq 2.90-0ubuntu0.22.04.3 | May 27, 2026 |
| dnsmasq · Ubuntu 24.04.5 LTS (noble) | 2.90-2ubuntu0.3 | dnsmasq 2.90-2ubuntu0.3 | May 27, 2026 |
| dnsmasq · Ubuntu 25.10 (questing) | 2.91-1ubuntu0.2 | dnsmasq 2.91-1ubuntu0.2 | May 27, 2026 |
| dnsmasq · Ubuntu 26.04.1 LTS (resolute) | 2.92-1ubuntu0.2 | dnsmasq 2.92-1ubuntu0.2 | May 11, 2026 |
| dnsmasq · almalinux 10 | 2.90-7.el10_2 | ALSA-2026:19158 | May 19, 2026 |
| dnsmasq · almalinux 8 | 2.79-36.el8_10 | ALSA-2026:20589 | May 26, 2026 |
| dnsmasq · almalinux 9 | 2.85-18.el9_8.1 | ALSA-2026:19373 | May 19, 2026 |
| dnsmasq · amzn 2023 | 2.90-1.amzn2023.0.3 | ALAS2023-2026-1729 | May 25, 2026 |
| dnsmasq · ol 10 | 0:2.90-7.el10_2 | ELSA-2026-19158 | Jul 16, 2026 |
| dnsmasq · ol 8 | 0:2.79-36.el8_10 | ELSA-2026-20589 | May 26, 2026 |
| dnsmasq · ol 9 | 0:2.85-18.el9_8.1 | ELSA-2026-19373 | Jun 23, 2026 |
| dnsmasq · rocky 10 | 0:2.90-7.el10_2 | RLSA-2026:19158 | May 29, 2026 |
| dnsmasq · rocky 8 | 0:2.79-36.el8_10 | RLSA-2026:20589 | May 29, 2026 |
| dnsmasq · rocky 9 | 0:2.85-18.el9_8.1 | RLSA-2026:19373 | May 28, 2026 |
| dnsmasq-base · Ubuntu 18.04.6 LTS (bionic) | 2.90-0ubuntu0.18.04.1+esm3 | dnsmasq-base 2.90-0ubuntu0.18.04.1+esm3 | May 27, 2026 |
| dnsmasq-base · Ubuntu 20.04 LTS (focal) | 2.90-0ubuntu0.20.04.1+esm2 | dnsmasq-base 2.90-0ubuntu0.20.04.1+esm2 | May 27, 2026 |
| dnsmasq-base · Ubuntu 22.04.1 LTS (jammy) | 2.90-0ubuntu0.22.04.3 | dnsmasq-base 2.90-0ubuntu0.22.04.3 | May 27, 2026 |
| dnsmasq-base · Ubuntu 24.04.5 LTS (noble) | 2.90-2ubuntu0.3 | dnsmasq-base 2.90-2ubuntu0.3 | May 27, 2026 |
| dnsmasq-base · Ubuntu 25.10 (questing) | 2.91-1ubuntu0.2 | dnsmasq-base 2.91-1ubuntu0.2 | May 27, 2026 |
| dnsmasq-base · Ubuntu 26.04.1 LTS (resolute) | 2.92-1ubuntu0.2 | dnsmasq-base 2.92-1ubuntu0.2 | May 11, 2026 |
| dnsmasq-base-lua · Ubuntu 18.04.6 LTS (bionic) | 2.90-0ubuntu0.18.04.1+esm3 | dnsmasq-base-lua 2.90-0ubuntu0.18.04.1+esm3 | May 27, 2026 |
| dnsmasq-base-lua · Ubuntu 20.04 LTS (focal) | 2.90-0ubuntu0.20.04.1+esm2 | dnsmasq-base-lua 2.90-0ubuntu0.20.04.1+esm2 | May 27, 2026 |
| dnsmasq-base-lua · Ubuntu 22.04.1 LTS (jammy) | 2.90-0ubuntu0.22.04.3 | dnsmasq-base-lua 2.90-0ubuntu0.22.04.3 | May 27, 2026 |
| dnsmasq-base-lua · Ubuntu 24.04.5 LTS (noble) | 2.90-2ubuntu0.3 | dnsmasq-base-lua 2.90-2ubuntu0.3 | May 27, 2026 |
| dnsmasq-base-lua · Ubuntu 25.10 (questing) | 2.91-1ubuntu0.2 | dnsmasq-base-lua 2.91-1ubuntu0.2 | May 27, 2026 |
| dnsmasq-base-lua · Ubuntu 26.04.1 LTS (resolute) | 2.92-1ubuntu0.2 | dnsmasq-base-lua 2.92-1ubuntu0.2 | May 11, 2026 |
| dnsmasq-debuginfo · amzn 2023 | 2.90-1.amzn2023.0.3 | ALAS2023-2026-1729 | May 25, 2026 |
| dnsmasq-debugsource · amzn 2023 | 2.90-1.amzn2023.0.3 | ALAS2023-2026-1729 | May 25, 2026 |
| dnsmasq-utils · RHEL 8 | 0:2.79-36.el8_10 | RHSA-2026:20589 | May 27, 2026 |
| dnsmasq-utils · RHEL 9 | 0:2.85-18.el9_8.1 | RHSA-2026:19373 | May 27, 2026 |
| dnsmasq-utils · Ubuntu 18.04.6 LTS (bionic) | 2.90-0ubuntu0.18.04.1+esm3 | dnsmasq-utils 2.90-0ubuntu0.18.04.1+esm3 | May 27, 2026 |
| dnsmasq-utils · Ubuntu 20.04 LTS (focal) | 2.90-0ubuntu0.20.04.1+esm2 | dnsmasq-utils 2.90-0ubuntu0.20.04.1+esm2 | May 27, 2026 |
| dnsmasq-utils · Ubuntu 22.04.1 LTS (jammy) | 2.90-0ubuntu0.22.04.3 | dnsmasq-utils 2.90-0ubuntu0.22.04.3 | May 27, 2026 |
| dnsmasq-utils · Ubuntu 24.04.5 LTS (noble) | 2.90-2ubuntu0.3 | dnsmasq-utils 2.90-2ubuntu0.3 | May 27, 2026 |
| dnsmasq-utils · Ubuntu 25.10 (questing) | 2.91-1ubuntu0.2 | dnsmasq-utils 2.91-1ubuntu0.2 | May 27, 2026 |
| dnsmasq-utils · Ubuntu 26.04.1 LTS (resolute) | 2.92-1ubuntu0.2 | dnsmasq-utils 2.92-1ubuntu0.2 | May 11, 2026 |
| dnsmasq-utils · almalinux 10 | 2.90-7.el10_2 | ALSA-2026:19158 | May 19, 2026 |
| dnsmasq-utils · almalinux 8 | 2.79-36.el8_10 | ALSA-2026:20589 | May 26, 2026 |
| dnsmasq-utils · almalinux 9 | 2.85-18.el9_8.1 | ALSA-2026:19373 | May 19, 2026 |
| dnsmasq-utils · amzn 2023 | 2.90-1.amzn2023.0.3 | ALAS2023-2026-1729 | May 25, 2026 |
| dnsmasq-utils · ol 10 | 0:2.90-7.el10_2 | ELSA-2026-19158 | Jul 16, 2026 |
| dnsmasq-utils · ol 8 | 0:2.79-36.el8_10 | ELSA-2026-20589 | May 26, 2026 |
| dnsmasq-utils · ol 9 | 0:2.85-18.el9_8.1 | ELSA-2026-19373 | Jun 23, 2026 |
| dnsmasq-utils-debuginfo · amzn 2023 | 2.90-1.amzn2023.0.3 | ALAS2023-2026-1729 | May 25, 2026 |
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