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Alerts This Week
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Debian LTS: DLA-4364-1 bind9 High Cache Poisoning Risks CVE-2025-8677

debian lts
Calendar Grey November 4, 2025
Dist Debian Esm H88
Debian LTS issued DLA-4364-1 for bind9 resolving critical cache poisoning and resource exhaustion issues.
Brief introduction CVE-2025-8677
Topics%20covered

Topics Covered

security advisory debian high cache poisoning DNS resource exhaustion

Summary

CVE-2025-8677

Resource exhaustion via malformed DNSKEY handling

CVE-2025-40778

Cache poisoning attacks with unsolicited RRs

CVE-2025-40780

Cache poisoning due to weak PRNG

For Debian 11 bullseye, these problems have been fixed in version
1:9.16.50-1~deb11u4.

We recommend that you upgrade your bind9 packages.

For the detailed security status of bind9 please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/bind9

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS


Severity
critical
Lowest
Low
Medium
High
Critical

Package: bind9
Version: 1:9.16.50-1~deb11u4
CVE ID: CVE-2025-8677 CVE-2025-40778 CVE-2025-40780
Debian Bug:

Topics%20covered

Topics Covered

security advisory debian high cache poisoning DNS resource exhaustion

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