DEBIAN-CVE-2026-63388
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-63388
- Import Source
- https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-63388.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2026-63388
- Upstream
- Published
- 2026-08-20T18:16:36Z
- Modified
- 2026-09-18T16:00:07Z
- Severity
-
- 8.4 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent has a heap out-of-bounds write in bufferevent_sock.c when bufferevent_socket_set_conn_address_ copies a kernel-supplied AF_UNIX peer address into bufferevent_private.conn_address. Release builds compiled with NDEBUG disable the EVUTIL_ASSERT length guard, and the evhttp accept path can pass a 110-byte sockaddr from accept() into the 28-byte field. An unauthenticated local peer able to connect to an AF_UNIX listener can overwrite the adjacent dns_request pointer and heap data, causing memory corruption with confidentiality, integrity, and availability impact. This issue is fixed in versions 2.1.13 and 2.2.2-alpha.
- References
Affected packages
Debian:12 / libevent
Package
- Name
- libevent
- Purl
- pkg:deb/debian/libevent?arch=source&distro=bookworm
Debian:13 / libevent
Package
- Name
- libevent
- Purl
- pkg:deb/debian/libevent?arch=source&distro=trixie
Debian:14 / libevent
Package
- Name
- libevent
- Purl
- pkg:deb/debian/libevent?arch=source&distro=forky