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:8	2.43	runtime
make	4.4.1	build
openssl	3.6.3	runtime
pkgconf	2.5.1	build
python CVE:8	3.14.6	build
toolchain	—	build

Dependency changes

Dependants (1)

Dependants
Name	Version
tmux	3.6a

Include transitive

Showing 17 advisories, 8 of which are transitive via libevent's dependencies

9 of 17 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 ( 7 )
	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-2026-5435	glibc	2.42 – 2.43	High: 7.3	3 months ago
Summary The deprecated functions ns_printrrf, ns_printrr and fp_nquery in the GNU C Library version 2.2 and newer fail to enforce the caller-supplied buffer length, and can result in an out-of-bounds write when printing TSIG records. Via glibc Affected ranges 2.42 – 2.43 CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
	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
	Affected: 2.43	CVE-2013-4412	glibc	2.42 – 2.43	High: 7.5	7 years ago
Summary slim has NULL pointer dereference when using crypt() method from glibc 2.17 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
Medium ( 3 )
	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	23 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-2026-6238	glibc	2.42 – 2.43	Medium: 6.5	3 months ago
Summary The deprecated functions ns_printrrf, ns_printrr and fp_nquery in the GNU C Library version 2.0.1 to version 2.43 fail to validate the RDATA content against the RDATA length in a DNS response when processing A6, CERT, LOC, TKEY or TSIG records, which may allow an attacker to craft a DNS response, causing a target application to crash or read uninitialized memory. These functions are for application debugging only and hence not in the path of code executed by the DNS resolver. Further, they have been deprecated since version 2.34 and should not be used by any new applications. Applications should consider porting away from these interfaces since they may be removed in future versions. Via glibc Affected ranges 2.42 – 2.43 CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
	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)

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