ALPINE-CVE-2026-40613
- Source
- https://security.alpinelinux.org/vuln/CVE-2026-40613
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-40613.json
- JSON Data
- https://api.osv.dev/v1/vulns/ALPINE-CVE-2026-40613
- Upstream
- Published
- 2026-04-21T19:16:17Z
- Modified
- 2026-11-03T06:33:02Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.10.0, the STUN/TURN attribute parsing functions in coturn perform unsafe pointer casts from uint8_t * to uint16_t * without alignment checks. When processing a crafted STUN message with odd-aligned attribute boundaries, this results in misaligned memory reads at ns_turn_msg.c. On ARM64 architectures (AArch64) with strict alignment enforcement, this causes a SIGBUS signal that immediately kills the turnserver process. An unauthenticated remote attacker can crash any ARM64 coturn deployment by sending a single crafted UDP packet. This vulnerability is fixed in 4.10.0.
- References
Affected packages
Alpine:v3.23 / coturn
Package
- Name
- coturn
- Purl
- pkg:apk/alpine/coturn?arch=source