CVE-2022-2906

Memory leaks in code handling Diffie-Hellman key exchange via TKEY RRs (OpenSSL 3.0.0+ only)

Description

An attacker can leverage this flaw to gradually erode available memory to the point where named crashes for lack of resources. Upon restart the attacker would have to begin again, but nevertheless there is the potential to deny service.

Remediation

Solution:

  • Upgrade to the patched release most closely related to your current version of BIND: BIND 9.18.7 or BIND 9.19.5.

Workaround:

  • There are no known workarounds. TKEY record processing in GSS-TSIG mode is not affected by this defect. The memory leak impacts authoritative DNS server TKEY record processing only. Client processing (resolver functions) do not trigger this defect.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.19%
Vendor Advisory gentoo.org Vendor Advisory isc.org
Affected: ISC BIND9
Published at:
Updated at:

References

Link Tags
https://kb.isc.org/docs/cve-2022-2906 vendor advisory patch
http://www.openwall.com/lists/oss-security/2022/09/21/3 third party advisory mailing list patch
https://security.gentoo.org/glsa/202210-25 vendor advisory third party advisory

Frequently Asked Questions

What is the severity of CVE-2022-2906?
CVE-2022-2906 has been scored as a high severity vulnerability.
How to fix CVE-2022-2906?
To fix CVE-2022-2906: Upgrade to the patched release most closely related to your current version of BIND: BIND 9.18.7 or BIND 9.19.5.
Is CVE-2022-2906 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-2906 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-2906?
CVE-2022-2906 affects ISC BIND9.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.