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Date: Wed, 21 Jun 2023 18:12:26 +0200
From: Michał Kępień <>
Subject: ISC has disclosed two vulnerabilities in BIND 9 (CVE-2023-2828,

On 21 June 2023 we (Internet Systems Consortium) disclosed two vulnerabilities affecting our BIND 9 software:

- CVE-2023-2828:        named's configured cache size limit can be significantly exceeded
- CVE-2023-2911:        Exceeding the recursive-clients quota may cause named to terminate unexpectedly when stale-answer-client-timeout is set to 0

New versions of BIND 9 are available from

Operators and package maintainers who prefer to apply patches selectively can find individual vulnerability-specific patches in the "patches" subdirectory of each published release directory:


With the public announcement of these vulnerabilities, the embargo period is ended and any updated software packages that have been prepared may be released.

Best regards,
Michał Kępień

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