libevent

Version: 2.1.12-stable

Event notification library

Install package

min add libevent

Library async c cross-platform

Updated last month

Supply chain security: 78
Advisories: 10
Quality: 25
Maintenance: 100
Licence: 90

What is "libevent"?

Event notification library

How to use this package

Quick install

Installs the package into the current environment for this session. Use --build or --runtime to persist it as a build-time or runtime dependency.

min add libevent

Declare as a task dependency in minimal.toml

Listing the package under tasks.<name>.packages makes it available inside that task’s sandbox.

[tasks.dev]
packages = ["libevent"]

Build-time vs runtime

Choose build-time for tools needed during compilation, runtime for dynamic libraries loaded at runtime.

min add --build libevent
min add --runtime libevent

Compare versions

Dependencies (7)

Dependencies
Name	Version	Kind
base	—	build
glibc CVE:5	2.43	runtime
make	4.4.1	build
openssl	3.6.3	runtime
pkgconf	2.5.1	build
python CVE:7	3.14.6	build
toolchain	—	build

Dependency changes

Dependants (1)

Dependants
Name	Version
tmux	3.6a

Include transitive

Showing 14 advisories, 5 of which are transitive via libevent's dependencies

9 of 14 advisories fixed in latest

Security advisories for this package
	Status	IDs	Package	Version	Severity	Published
Critical ( 1 )
	Under investigation	CVE-2026-5450	glibc	2.42 – 2.43	Critical: 9.8	3 months ago
Summary scanf %mc off-by-one heap buffer overflow Via glibc Affected ranges 2.42 – 2.43 CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H References Advisory: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5450.json , https://nvd.nist.gov/vuln/detail/CVE-2026-5450 Report: https://sourceware.org/bugzilla/show_bug.cgi?id=CVE-2026-5450 ARTICLE: https://inbox.sourceware.org/libc-announce/b11f0003-6ec1-4bd6-b9de-9e38a4efeca3@redhat.com/T/#u
High ( 5 )
	Status	IDs	Package	Version	Severity	Published
	Resolved in release-2.2.2-alpha Fixed in release-2.2.2-alpha	GHSA-58rx-7448-jw47	libevent	release-2.1.12 – release-2.1.13, fixed in release-2.2.2-alpha	High: 7.0	13 days ago
Summary Off-by-one stack buffer overflow in dnsname_to_labels via crafted DNS server response Affected ranges release-2.1.12 – release-2.1.13, fixed in release-2.2.2-alpha Fixed in release-2.2.2-alpha CVSS vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H References Web: https://github.com/libevent/libevent/security/advisories/GHSA-58rx-7448-jw47
	Resolved in release-2.2.2-alpha Fixed in release-2.2.2-alpha	GHSA-cvq5-vrvr-j338	libevent	release-2.1.12 – release-2.1.13, fixed in release-2.2.2-alpha	High: 8.4	13 days ago
Summary Heap out-of-bounds write in bufferevent_socket_set_conn_address_ reachable via AF_UNIX accept Affected ranges release-2.1.12 – release-2.1.13, fixed in release-2.2.2-alpha Fixed in release-2.2.2-alpha CVSS vector CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H References Web: https://github.com/libevent/libevent/security/advisories/GHSA-cvq5-vrvr-j338
	Under investigation	CVE-2026-5928	glibc	2.42 – 2.43	High: 7.5	3 months ago
Summary Potential buffer under-read in ungetwc Via glibc Affected ranges 2.42 – 2.43 CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H References Advisory: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5928.json , https://nvd.nist.gov/vuln/detail/CVE-2026-5928 Report: https://sourceware.org/bugzilla/show_bug.cgi?id=33998
	Under investigation	CVE-2026-4046	glibc	2.42 – 2.43	High: 7.5	4 months ago
Summary iconv crash due to assertion failure with untrusted input Via glibc Affected ranges 2.42 – 2.43 CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H References Advisory: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4046.json , https://nvd.nist.gov/vuln/detail/CVE-2026-4046 , https://sourceware.org/git/?p=glibc.git;a=blob_plain;f=advisories/GLIBC-SA-2026-0007;hb=HEAD Report: https://sourceware.org/bugzilla/show_bug.cgi?id=33980 ARTICLE: https://inbox.sourceware.org/libc-announce/76814edf-cf7f-47ec-979d-2dce0a2c76bf@gotplt.org/T/#u
	Under investigation	CVE-2026-4437	glibc	2.42 – 2.43	High: 7.5	4 months ago
Summary gethostbyaddr and gethostbyaddr_r may incorrectly handle DNS response Via glibc Affected ranges 2.42 – 2.43 CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H References Advisory: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4437.json , https://nvd.nist.gov/vuln/detail/CVE-2026-4437 Report: https://sourceware.org/bugzilla/show_bug.cgi?id=34014
Medium ( 2 )
	Status	IDs	Package	Version	Severity	Published
	Resolved in release-2.2.2-alpha Fixed in release-2.2.2-alpha	GHSA-5rgj-2c58-7jrc	libevent	release-2.1.12 – release-2.1.13, fixed in release-2.2.2-alpha	Medium: 6.7	22 days ago
Summary Stack buffer overflow in sample/http-server via unbounded Unix socket path (strcpy) Affected ranges release-2.1.12 – release-2.1.13, fixed in release-2.2.2-alpha Fixed in release-2.2.2-alpha CVSS vector CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H References Web: https://github.com/libevent/libevent/security/advisories/GHSA-5rgj-2c58-7jrc
	Under investigation	CVE-2026-4438	glibc	2.42 – 2.43	Medium: 5.4	4 months ago
Summary gethostbyaddr and gethostbyaddr_r return invalid DNS hostnames Via glibc Affected ranges 2.42 – 2.43 CVSS vector CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N References Advisory: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4438.json , https://nvd.nist.gov/vuln/detail/CVE-2026-4438 Report: https://sourceware.org/bugzilla/show_bug.cgi?id=34015
Low ( 0 )
	Status	IDs	Package	Version	Severity	Published
Unknown ( 6 )
	Status	IDs	Package	Version	Severity	Published
	Resolved in release-2.2.2-alpha Fixed in release-2.2.2-alpha	GHSA-2gmv-p5m7-98p6	libevent	release-2.1.12 – release-2.1.13, fixed in release-2.2.2-alpha	Unknown	13 days ago
Summary HTTP Header smuggling Affected ranges release-2.1.12 – release-2.1.13, fixed in release-2.2.2-alpha Fixed in release-2.2.2-alpha References Web: https://github.com/libevent/libevent/security/advisories/GHSA-2gmv-p5m7-98p6
	Resolved in release-2.2.2-alpha Fixed in release-2.2.2-alpha	GHSA-c2pj-cg4r-88c8	libevent	release-2.1.12 – release-2.1.13, fixed in release-2.2.2-alpha	Unknown	13 days ago
Summary Dangling Pointer in `evbuffer_add_buffer_reference` Affected ranges release-2.1.12 – release-2.1.13, fixed in release-2.2.2-alpha Fixed in release-2.2.2-alpha References Web: https://github.com/libevent/libevent/security/advisories/GHSA-c2pj-cg4r-88c8
	Resolved in release-2.2.2-alpha Fixed in release-2.2.2-alpha	GHSA-q39v-w2g7-gr8j	libevent	release-2.1.12 – release-2.1.13, fixed in release-2.2.2-alpha	Unknown	13 days ago
Summary libevent evhttp: Multiple HTTP Parser Bugs Enable Request Smuggling Affected ranges release-2.1.12 – release-2.1.13, fixed in release-2.2.2-alpha Fixed in release-2.2.2-alpha References Web: https://github.com/libevent/libevent/security/advisories/GHSA-q39v-w2g7-gr8j
	Resolved in release-2.2.2-alpha Fixed in release-2.2.2-alpha	GHSA-fj29-64w6-73h6	libevent	release-2.1.12 – release-2.1.13, fixed in release-2.2.2-alpha	Unknown	13 days ago
Summary decode_tag_internal() can lead to out-of-bounds read Affected ranges release-2.1.12 – release-2.1.13, fixed in release-2.2.2-alpha Fixed in release-2.2.2-alpha References Web: https://github.com/libevent/libevent/security/advisories/GHSA-fj29-64w6-73h6
	Resolved in release-2.2.2-alpha Fixed in release-2.2.2-alpha	GHSA-45c6-qx49-89m8	libevent	release-2.1.12 – release-2.1.13, fixed in release-2.2.2-alpha	Unknown	13 days ago
Summary `evtag_unmarshal_header()` decodes a wire `uint32` length into a signed `int` return value. Affected ranges release-2.1.12 – release-2.1.13, fixed in release-2.2.2-alpha Fixed in release-2.2.2-alpha References Web: https://github.com/libevent/libevent/security/advisories/GHSA-45c6-qx49-89m8
	Resolved in release-2.2.2-alpha Fixed in release-2.2.2-alpha	GHSA-jcwh-pvf2-73p2	libevent	release-2.1.12 – release-2.1.13, fixed in release-2.2.2-alpha	Unknown	13 days ago
Summary HTTP header handling bugs create risk of access control bypass. Affected ranges release-2.1.12 – release-2.1.13, fixed in release-2.2.2-alpha Fixed in release-2.2.2-alpha References Web: https://github.com/libevent/libevent/security/advisories/GHSA-jcwh-pvf2-73p2

44 components

Software Bill of Materials — every package this build depends on
Packages	Version	Repository	Licence
libevent ROOT	2.1.12-stable	github.com/libevent/libevent	BSD-3-Clause
acl	2.4.0	https://storage.googleapis.com/minimal-staging-archives/acl-2.4.0.tar.xz MIRROR	(GPL-2.0-only AND LGPL-2.1-only)
attr	2.6.0	https://storage.googleapis.com/minimal-staging-archives/attr-2.6.0.tar.gz MIRROR	(GPL-2.0-only AND LGPL-2.1-only)
bash	5.3	www.gnu.org/software/bash	GPL-3.0-only
bash-bootstrap	5.3	www.gnu.org/software/bash	GPL-3.0-only
binutils	2.46.1	www.gnu.org/software/binutils	(GPL-2.0-only AND GPL-3.0-only AND LGPL-2.0-only)
bison	3.8.2	www.gnu.org/software/bison	GPL-3.0-only
bzip2	1.0.8	github.com/libarchive/bzip2	bzip2-1.0.6
coreutils	9.11	www.gnu.org/software/coreutils	GPL-3.0-only
diffutils	3.12	www.gnu.org/software/diffutils	GPL-3.0-only
expat	2.8.2	github.com/libexpat/libexpat	MIT
file	5.48	https://storage.googleapis.com/minimal-staging-archives/file-5.48.tar.gz MIRROR	BSD-2-Clause-Darwin
findutils	4.10.0	www.gnu.org/software/findutils	GPL-3.0-only
flex	2.6.4	github.com/westes/flex	BSD-3-Clause-flex
gawk	5.4.0	www.gnu.org/software/gawk	GPL-3.0-only
gawk-bootstrap	5.3.2	www.gnu.org/software/gawk	GPL-3.0-only
gcc	15.2.0	www.gnu.org/software/gcc	(GPL-2.0-only AND GPL-3.0-only AND LGPL-2.1-only)
gdbm	1.26	www.gnu.org/software/gdbm	GPL-3.0-only
glibc	2.43	www.gnu.org/software/glibc	(GPL-2.0-only AND LGPL-2.1-only)
gmp	6.3.0	www.gnu.org/software/gmp	LGPL-3.0-or-later OR GPL-2.0-or-later
grep	3.12	www.gnu.org/software/grep	GPL-3.0-only
gzip	1.14	www.gnu.org/software/gzip	GPL-3.0-only
libcap	2.78	https://storage.googleapis.com/minimal-staging-archives/libcap-2.78.tar.xz MIRROR	BSD-3-Clause OR GPL-2.0-only
libffi	3.6.0	github.com/libffi/libffi	MIT
linux_headers	6.12.43	github.com/torvalds/linux	GPL-2.0-only WITH Linux-syscall-note
lz4	1.10.0	github.com/lz4/lz4	BSD-2-Clause AND GPL-2.0-or-later
m4	1.4.21	www.gnu.org/software/m4	GPL-3.0-only
make	4.4.1	www.gnu.org/software/make	GPL-3.0-only
mpc	1.4.0	www.gnu.org/software/mpc	LGPL-3.0-or-later
mpfr	4.2.2	www.gnu.org/software/mpfr	GPL-3.0-only
ncurses	6.6	www.gnu.org/software/ncurses	X11-distribute-modifications-variant
openssl	3.6.3	github.com/openssl/openssl	Apache-2.0
pcre2	10.47	github.com/PCRE2Project/pcre2	BSD-3-Clause WITH PCRE2-exception
perl	5.42.2	github.com/Perl/perl5	Artistic-1.0-Perl OR GPL-1.0-or-later
pkgconf	2.5.1	github.com/pkgconf/pkgconf	pkgconf
python	3.14.6	github.com/python/cpython	Python-2.0.1
readline	8.3	www.gnu.org/software/readline	GPL-3.0-only
sed	4.10	www.gnu.org/software/sed	GPL-3.0-only
sqlite	3.50.4	github.com/sqlite/sqlite	blessing
tar	1.35	www.gnu.org/software/tar	GPL-3.0-only
util-linux	2.42.2	github.com/util-linux/util-linux	GPL-2.0-or-later AND LGPL-2.1-or-later AND BSD-3-Clause
xz	5.8.3	github.com/tukaani-project/xz	(0BSD AND GPL-2.0-only AND GPL-3.0-only AND LGPL-2.1-only)
zlib	1.3.2	github.com/madler/zlib	Zlib
zstd	1.5.7	github.com/facebook/zstd	BSD-3-Clause OR GPL-2.0-only

libevent

Install package

What is "libevent"?

How to use this package

Quick install

Declare as a task dependency in minimal.toml

Build-time vs runtime

Dependencies (7)

Dependency changes

Dependants (1)

Summary

Via

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CVSS vector

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44 components