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Date: Wed, 21 Sep 2022 11:46:28 +0200
From: Michał Kępień <>
Subject: ISC has disclosed six vulnerabilities in BIND (CVE-2022-2795,
 CVE-2022-2881, CVE-2022-2906, CVE-2022-3080, CVE-2022-38177, CVE-2022-38178)

On 21 September 2022 we (Internet Systems Consortium) disclosed six vulnerabilities affecting our BIND 9 software:

- CVE-2022-2795:	Processing large delegations may severely degrade resolver performance
- CVE-2022-2881:	Buffer overread in statistics channel code
- CVE-2022-2906:	Memory leaks in code handling Diffie-Hellman key exchange via TKEY RRs (OpenSSL 3.0.0+ only)
- CVE-2022-3080:	BIND 9 resolvers configured to answer from stale cache with zero stale-answer-client-timeout may terminate unexpectedly
- CVE-2022-38177:	Memory leak in ECDSA DNSSEC verification code
- CVE-2022-38178:	Memory leaks in EdDSA DNSSEC verification code

New versions of BIND are available from

Operators and package maintainers who prefer to apply patches selectively can find individual vulnerability-specific patches in the "patches" subdirectory of the release directories for our stable release branches (9.16 and 9.18):


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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