What’s Vulnerable › Vulnerabilities

CVE-2022-0396: DoS from specifically crafted TCP packets

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-03-23 · updated 2026-06-17
• Weakness: CWE-404

Description

BIND 9.16.11 -> 9.16.26, 9.17.0 -> 9.18.0 and versions 9.16.11-S1 -> 9.16.26-S1 of the BIND Supported Preview Edition. Specifically crafted TCP streams can cause connections to BIND to remain in CLOSE_WAIT status for an indefinite period of time, even after the client has terminated the connection.

Affected products

• Fedoraproject Fedora: 34, 35, 36
• ISC BIND: from 9.16.11 before 9.16.27; from 9.17.0 through 9.18.0 — fixed in 9.16.27
• NetApp H300E Firmware: all versions
• NetApp H300S Firmware: all versions
• NetApp H410C Firmware: all versions
• NetApp H410S Firmware: all versions
• NetApp H500E Firmware: all versions
• NetApp H500S Firmware: all versions
• NetApp H700E Firmware: all versions
• NetApp H700S Firmware: all versions
• Siemens SINEC INS: before 1.0; 1.0, 1.0-sp1 — fixed in 1.0

How to fix

Upgrade to a fixed version: ISC BIND 9.16.27; Siemens SINEC INS 1.0. Check the vendor advisory for mitigations.

References

• https://cert-portal.siemens.com/productcert/pdf/ssa-637483.pdf
• https://kb.isc.org/v1/docs/cve-2022-0396
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NYD7US4HZRFUGAJ66ZTHFBYVP5N3OQBY/
• https://security.gentoo.org/glsa/202210-25
• https://security.netapp.com/advisory/ntap-20220408-0001/
• https://cert-portal.siemens.com/productcert/pdf/ssa-637483.pdf
• https://kb.isc.org/v1/docs/cve-2022-0396
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NYD7US4HZRFUGAJ66ZTHFBYVP5N3OQBY/
• https://security.gentoo.org/glsa/202210-25
• https://security.netapp.com/advisory/ntap-20220408-0001/

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