DEBIAN-CVE-2025-40775: bind9 security update

DEBIAN-CVE-2025-40775, released May 21, 2025, fixes 1 CVE in bind9 (version 1:9.20.9-1). None of them is reported as exploited. Patch Radar priority: High.

High

CVEs closed

None rated Critical

Exploited

None reported

Highest CVSS

7.5

Base score, 0 to 10

Highest EPSS

0.1531

96th percentile

Fixed package versions

Product	Release	Fixed in
bind9	Debian 13.5 (trixie)	1:9.20.9-1
bind9	Debian 14	1:9.20.9-1

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
High	CVE-2025-40775	DNS message with invalid TSIG causes an assertion failure	7.5	0.1531	None reported

Also fixes CVE-2025-40775

SUSE-SU-2025:01787-1
bind on sles 15.7
bind9 1:9.20.0-2ubuntu3.2
bind9 on Ubuntu 24.10 (oracular)
bind9 1:9.20.4-3ubuntu1.1
bind9 on Ubuntu 25.04 (plucky)
bind9-dnsutils 1:9.20.0-2ubuntu3.2
bind9-dnsutils on Ubuntu 24.10 (oracular)
bind9-dnsutils 1:9.20.4-3ubuntu1.1
bind9-dnsutils on Ubuntu 25.04 (plucky)
bind9-host 1:9.20.0-2ubuntu3.2
bind9-host on Ubuntu 24.10 (oracular)
bind9-host 1:9.20.4-3ubuntu1.1
bind9-host on Ubuntu 25.04 (plucky)
bind9-libs 1:9.20.0-2ubuntu3.2
bind9-libs on Ubuntu 24.10 (oracular)

Vendor advisory

https://security-tracker.debian.org/tracker/CVE-2025-40775

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