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Vulnerability · Published May 20, 2026 · Assigned by isc

CVE-2026-3592Amplification vulnerabilities via self-pointed glue records

Medium 5.3

In plain English

A medium-severity security flaw in BIND 9 from ISC. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.4%top 65.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

BIND resolvers are vulnerable to an amplified resource consumption/exhaustion attack. If a victim resolver makes a query to a specially crafted zone, the resolver will consume disproportionate resources. This issue affects BIND 9 versions 9.11.0 through 9.16.50, 9.18.0 through 9.18.48, 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.48-S1, and 9.20.9-S1 through 9.20.22-S1.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.20bind9.18.49-r0ALPINE-CVE-2026-3592
Alpine:v3.21bind9.18.49-r0ALPINE-CVE-2026-3592
Alpine:v3.22bind9.20.23-r0ALPINE-CVE-2026-3592
Alpine:v3.23bind9.20.23-r0ALPINE-CVE-2026-3592
Alpine:v3.24bind9.20.23-r0ALPINE-CVE-2026-3592
Debian:12bind91:9.18.49-1~deb12u2DEBIAN-CVE-2026-3592
Debian:13bind91:9.20.23-1~deb13u1DEBIAN-CVE-2026-3592
Debian:14bind91:9.20.23-1DEBIAN-CVE-2026-3592
Ubuntu:22.04:LTSbind91:9.18.39-0ubuntu0.22.04.4UBUNTU-CVE-2026-3592
Ubuntu:24.04:LTSbind91:9.18.39-0ubuntu0.24.04.5UBUNTU-CVE-2026-3592
Ubuntu:25.10bind91:9.20.11-1ubuntu2.4UBUNTU-CVE-2026-3592
Ubuntu:26.04:LTSbind91:9.20.18-1ubuntu2.1UBUNTU-CVE-2026-3592
Ubuntu:22.04:LTSbind9-libsno fix listedUBUNTU-CVE-2026-3592
Ubuntu:24.04:LTSisc-dhcpno fix listedUBUNTU-CVE-2026-3592
Ubuntu:25.10isc-dhcpno fix listedUBUNTU-CVE-2026-3592
Ubuntu:26.04:LTSisc-dhcpno fix listedUBUNTU-CVE-2026-3592

Affected products (as reported)

VendorProductVersions
ISC BIND 9 9.11.0 – through 9.16.509.18.0 – through 9.18.489.20.0 – through 9.20.229.21.0 – through 9.21.219.11.3-S1 – through 9.16.50-S19.18.11-S1 – through 9.18.48-S19.20.9-S1 – through 9.20.22-S1

Weakness: CWE-408 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References