ALPINE-CVE-2022-43552 — Vulnetix

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ALPINE-CVE-2022-43552 PUBLISHED CVSS 5.900000095367432 MEDIUM

A use after free vulnerability exists in curl <7.87.0. Curl can be asked to *tunnel* virtually all protocols it supports through an HTTP proxy. HTTP proxies can (and often do) deny such tunnel operations. When getting denied to tunnel the specific protocols SMB or TELNET, curl would use a heap-allocated struct after it had been freed, in its transfer shutdown code path.

Risk Scores

CVSS v3.1

5.900000095367432

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

Affected Products

Vendor	Product	Versions
Alpine:v3.16	curl	7.52.1-r0, 7.23.1-r0, 7.22.0-r0
Alpine:v3.14	curl	7.19.2-r0, 7.19.2-r1, 7.19.4-r0
Alpine:v3.20	curl	7.19.2-r0, 7.86.0-r1, 7.86.0-r0
Alpine:v3.22	curl	7.86.0-r1, 7.66.0-r0, 7.67.0-r0
Alpine:v3.21	curl	7.53.1-r1, 0, 7.19.2-r0
Alpine:v3.17	curl	7.66.0-r0, 7.86.0-r1, 7.86.0-r0
Alpine:v3.18	curl	0, 7.86.0-r1, 7.86.0-r0
Alpine:v3.15	curl	0, 7.80.0-r4, 7.80.0-r3
Alpine:v3.23	curl	7.86.0-r1, 7.65.3-r0, 7.65.1-r0
Alpine:v3.19	curl	7.34.0-r1, 7.86.0-r1, 7.86.0-r0

Timeline

Feb 9, 2023 CVE Published
Dec 3, 2025 CVE Updated
Apr 30, 2026 Distribution Patch

References

https://security.alpinelinux.org/vuln/CVE-2022-43552 advisory

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