DEBIAN-CVE-2026-50161
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-50161
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-50161.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-50161
- Upstream
- Published
- 2026-08-18T18:17:53Z
- Modified
- 2026-09-19T22:47:43Z
- Severity
-
- 9.3 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS Calculator
- Summary
- [none]
- Details
-
libre is a generic library for real-time communications with asynchronous input and output support. Prior to 4.8.1, the websock_decode() function in src/websock/websock.c contains an integer overflow when validating a masked WebSocket frame that uses the 64-bit extended length encoding. The expression 4 + hdr->len can wrap when hdr->len is close to UINT64_MAX, causing the mbuf_get_left() bounds check to pass. The subsequent XOR unmasking loop then writes beyond the heap buffer. Applications using websock_accept() or websock_accept_proto() to implement a WebSocket server are affected, and exploitation can cause attacker-controlled heap corruption or denial of service after the HTTP WebSocket upgrade handshake. This issue is fixed in version 4.8.1.
- References
Affected packages
Debian:12 / libre
Package
- Name
- libre
- Purl
- pkg:deb/debian/libre?arch=source&distro=bookworm
Debian:13 / libre
Package
- Name
- libre
- Purl
- pkg:deb/debian/libre?arch=source&distro=trixie
Debian:14 / libre
Package
- Name
- libre
- Purl
- pkg:deb/debian/libre?arch=source&distro=forky