ALPINE-CVE-2023-4236 — Vulnetix

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ALPINE-CVE-2023-4236 PUBLISHED CVSS 7.5 HIGH

A flaw in the networking code handling DNS-over-TLS queries may cause `named` to terminate unexpectedly due to an assertion failure. This happens when internal data structures are incorrectly reused under significant DNS-over-TLS query load. This issue affects BIND 9 versions 9.18.0 through 9.18.18 and 9.18.11-S1 through 9.18.18-S1.

Risk Scores

CVSS v3.1

7.5

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Products

Vendor	Product	Versions
Alpine:v3.20	bind	, , 0
Alpine:v3.19	bind	9.16.20-r1, 9.10.0_p2-r0, 9.10.0_p2-r1
Alpine:v3.21	bind	*, 9.18.10-r0, 9.14.4-r2
Alpine:v3.17	bind	*, 0, 9.10.0-r0
Alpine:v3.22	bind	9.9.5-r0, 0, 9.10.0-r0
Alpine:v3.23	bind	9.10.3, 9.10.3, 9.10.3
Alpine:v3.18	bind	9.18.14-r0, 9.10.0-r0, 9.10.0_p1-r0

Timeline

Sep 20, 2023 CVE Published
Dec 3, 2025 CVE Updated
Apr 30, 2026 Distribution Patch

References

https://security.alpinelinux.org/vuln/CVE-2023-4236 advisory

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