RHEL 9 : libevent (RHSA-2026:67910)
| Reporter | Title | Published | Views | Family All 292 |
|---|---|---|---|---|
| Security Bulletin: IBM i is Affected By Multiple Vulnerabilities in NTP | 17 Sep 202622:42 | – | ibm | |
| Amazon Linux 2023 : libevent, libevent-devel (ALAS2023-2026-2128) | 14 Sep 202600:00 | – | nessus | |
| Amazon Linux 2 : libevent (ALAS-2026-3902) | 14 Sep 202600:00 | – | nessus | |
| AlmaLinux 8 : libevent (ALSA-2026:67908) | 17 Sep 202600:00 | – | nessus | |
| AlmaLinux 10 : libevent (ALSA-2026:67909) | 17 Sep 202600:00 | – | nessus | |
| AlmaLinux 9 : libevent (ALSA-2026:67910) | 17 Sep 202600:00 | – | nessus | |
| Debian dsa-6493 : libevent-2.1-7t64 - security update | 11 Sep 202600:00 | – | nessus | |
| Fedora 45 : libevent (2026-0a83f1b852) | 11 Sep 202600:00 | – | nessus | |
| Fedora 43 : libevent (2026-728dd9f704) | 11 Sep 202600:00 | – | nessus | |
| Fedora 44 : libevent (2026-72d10c874d) | 9 Sep 202600:00 | – | nessus |
10
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#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2026:67910. The text
# itself is copyright (C) Red Hat, Inc.
##
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The libevent packages provide an abstract asynchronous event notification library.
Security Fix(es):
* libevent: Libevent: Denial of Service via malformed RPC data (CVE-2026-63383)
* libevent: Libevent: Off-by-one stack buffer overflow leading to denial of service or data corruption
(CVE-2026-63387)
* libevent: Libevent: Memory corruption due to use-after-free (CVE-2026-63381)
* libevent: Libevent: Denial of Service via integer conversion error in `evtag_unmarshal_header`
(CVE-2026-63384)
* libevent evhttp: Multiple HTTP Parser Bugs Enable Request Smuggling (CVE-2026-63382)
* libevent: Libevent: Arbitrary code execution via heap out-of-bounds write in AF_UNIX handling
(CVE-2026-63388)
* libevent: Libevent: HTTP header handling bugs create risk of access control bypass. (CVE-2026-63385)
* libevent: Libevent: HTTP header smuggling allows authorization bypass or cache poisoning
(CVE-2026-63379)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and
other related information, refer to the CVE page(s) listed in the References section.
Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.
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'content/dist/rhel9/9.4/s390x/baseos/os',
'content/dist/rhel9/9.4/s390x/baseos/source/SRPMS',
'content/dist/rhel9/9.4/x86_64/baseos/debug',
'content/dist/rhel9/9.4/x86_64/baseos/os',
'content/dist/rhel9/9.4/x86_64/baseos/source/SRPMS',
'content/dist/rhel9/9.5/aarch64/baseos/debug',
'content/dist/rhel9/9.5/aarch64/baseos/os',
'content/dist/rhel9/9.5/aarch64/baseos/source/SRPMS',
'content/dist/rhel9/9.5/ppc64le/baseos/debug',
'content/dist/rhel9/9.5/ppc64le/baseos/os',
'content/dist/rhel9/9.5/ppc64le/baseos/source/SRPMS',
'content/dist/rhel9/9.5/s390x/baseos/debug',
'content/dist/rhel9/9.5/s390x/baseos/os',
'content/dist/rhel9/9.5/s390x/baseos/source/SRPMS',
'content/dist/rhel9/9.5/x86_64/baseos/debug',
'content/dist/rhel9/9.5/x86_64/baseos/os',
'content/dist/rhel9/9.5/x86_64/baseos/source/SRPMS',
'content/dist/rhel9/9.6/aarch64/baseos/debug',
'content/dist/rhel9/9.6/aarch64/baseos/os',
'content/dist/rhel9/9.6/aarch64/baseos/source/SRPMS',
'content/dist/rhel9/9.6/ppc64le/baseos/debug',
'content/dist/rhel9/9.6/ppc64le/baseos/os',
'content/dist/rhel9/9.6/ppc64le/baseos/source/SRPMS',
'content/dist/rhel9/9.6/s390x/baseos/debug',
'content/dist/rhel9/9.6/s390x/baseos/os',
'content/dist/rhel9/9.6/s390x/baseos/source/SRPMS',
'content/dist/rhel9/9.6/x86_64/baseos/debug',
'content/dist/rhel9/9.6/x86_64/baseos/os',
'content/dist/rhel9/9.6/x86_64/baseos/source/SRPMS',
'content/dist/rhel9/9.7/aarch64/baseos/debug',
'content/dist/rhel9/9.7/aarch64/baseos/os',
'content/dist/rhel9/9.7/aarch64/baseos/source/SRPMS',
'content/dist/rhel9/9.7/ppc64le/baseos/debug',
'content/dist/rhel9/9.7/ppc64le/baseos/os',
'content/dist/rhel9/9.7/ppc64le/baseos/source/SRPMS',
'content/dist/rhel9/9.7/s390x/baseos/debug',
'content/dist/rhel9/9.7/s390x/baseos/os',
'content/dist/rhel9/9.7/s390x/baseos/source/SRPMS',
'content/dist/rhel9/9.7/x86_64/baseos/debug',
'content/dist/rhel9/9.7/x86_64/baseos/os',
'content/dist/rhel9/9.7/x86_64/baseos/source/SRPMS',
'content/dist/rhel9/9.8/aarch64/baseos/debug',
'content/dist/rhel9/9.8/aarch64/baseos/os',
'content/dist/rhel9/9.8/aarch64/baseos/source/SRPMS',
'content/dist/rhel9/9.8/ppc64le/baseos/debug',
'content/dist/rhel9/9.8/ppc64le/baseos/os',
'content/dist/rhel9/9.8/ppc64le/baseos/source/SRPMS',
'content/dist/rhel9/9.8/s390x/baseos/debug',
'content/dist/rhel9/9.8/s390x/baseos/os',
'content/dist/rhel9/9.8/s390x/baseos/source/SRPMS',
'content/dist/rhel9/9.8/x86_64/baseos/debug',
'content/dist/rhel9/9.8/x86_64/baseos/os',
'content/dist/rhel9/9.8/x86_64/baseos/source/SRPMS',
'content/dist/rhel9/9.9/aarch64/baseos/debug',
'content/dist/rhel9/9.9/aarch64/baseos/os',
'content/dist/rhel9/9.9/aarch64/baseos/source/SRPMS',
'content/dist/rhel9/9.9/ppc64le/baseos/debug',
'content/dist/rhel9/9.9/ppc64le/baseos/os',
'content/dist/rhel9/9.9/ppc64le/baseos/source/SRPMS',
'content/dist/rhel9/9.9/s390x/baseos/debug',
'content/dist/rhel9/9.9/s390x/baseos/os',
'content/dist/rhel9/9.9/s390x/baseos/source/SRPMS',
'content/dist/rhel9/9.9/x86_64/baseos/debug',
'content/dist/rhel9/9.9/x86_64/baseos/os',
'content/dist/rhel9/9.9/x86_64/baseos/source/SRPMS',
'content/dist/rhel9/9/aarch64/baseos/debug',
'content/dist/rhel9/9/aarch64/baseos/os',
'content/dist/rhel9/9/aarch64/baseos/source/SRPMS',
'content/dist/rhel9/9/ppc64le/baseos/debug',
'content/dist/rhel9/9/ppc64le/baseos/os',
'content/dist/rhel9/9/ppc64le/baseos/source/SRPMS',
'content/dist/rhel9/9/s390x/baseos/debug',
'content/dist/rhel9/9/s390x/baseos/os',
'content/dist/rhel9/9/s390x/baseos/source/SRPMS',
'content/dist/rhel9/9/x86_64/baseos/debug',
'content/dist/rhel9/9/x86_64/baseos/os',
'content/dist/rhel9/9/x86_64/baseos/source/SRPMS',
'content/public/ubi/dist/ubi9/9/aarch64/baseos/debug',
'content/public/ubi/dist/ubi9/9/aarch64/baseos/os',
'content/public/ubi/dist/ubi9/9/aarch64/baseos/source/SRPMS',
'content/public/ubi/dist/ubi9/9/ppc64le/baseos/debug',
'content/public/ubi/dist/ubi9/9/ppc64le/baseos/os',
'content/public/ubi/dist/ubi9/9/ppc64le/baseos/source/SRPMS',
'content/public/ubi/dist/ubi9/9/s390x/baseos/debug',
'content/public/ubi/dist/ubi9/9/s390x/baseos/os',
'content/public/ubi/dist/ubi9/9/s390x/baseos/source/SRPMS',
'content/public/ubi/dist/ubi9/9/x86_64/baseos/debug',
'content/public/ubi/dist/ubi9/9/x86_64/baseos/os',
'content/public/ubi/dist/ubi9/9/x86_64/baseos/source/SRPMS'
],
'pkgs': [
{'reference':'libevent-2.1.13-1.el9_8', 'rpm_spec_vers_cmp':TRUE}
]
},
{
'release': '9',
'sp': '8',
'repo_relative_urls': [
'content/e4s/rhel9/9.8/aarch64/appstream/debug',
'content/e4s/rhel9/9.8/aarch64/appstream/os',
'content/e4s/rhel9/9.8/aarch64/appstream/source/SRPMS',
'content/e4s/rhel9/9.8/ppc64le/appstream/debug',
'content/e4s/rhel9/9.8/ppc64le/appstream/os',
'content/e4s/rhel9/9.8/ppc64le/appstream/source/SRPMS',
'content/e4s/rhel9/9.8/s390x/appstream/debug',
'content/e4s/rhel9/9.8/s390x/appstream/os',
'content/e4s/rhel9/9.8/s390x/appstream/source/SRPMS',
'content/e4s/rhel9/9.8/x86_64/appstream/debug',
'content/e4s/rhel9/9.8/x86_64/appstream/os',
'content/e4s/rhel9/9.8/x86_64/appstream/source/SRPMS',
'content/e6s/rhel9/9.8/aarch64/appstream/debug',
'content/e6s/rhel9/9.8/aarch64/appstream/os',
'content/e6s/rhel9/9.8/aarch64/appstream/source/SRPMS',
'content/e6s/rhel9/9.8/ppc64le/appstream/debug',
'content/e6s/rhel9/9.8/ppc64le/appstream/os',
'content/e6s/rhel9/9.8/ppc64le/appstream/source/SRPMS',
'content/e6s/rhel9/9.8/s390x/appstream/debug',
'content/e6s/rhel9/9.8/s390x/appstream/os',
'content/e6s/rhel9/9.8/s390x/appstream/source/SRPMS',
'content/e6s/rhel9/9.8/x86_64/appstream/debug',
'content/e6s/rhel9/9.8/x86_64/appstream/os',
'content/e6s/rhel9/9.8/x86_64/appstream/source/SRPMS',
'content/eus/rhel9/9.8/aarch64/appstream/debug',
'content/eus/rhel9/9.8/aarch64/appstream/os',
'content/eus/rhel9/9.8/aarch64/appstream/source/SRPMS',
'content/eus/rhel9/9.8/ppc64le/appstream/debug',
'content/eus/rhel9/9.8/ppc64le/appstream/os',
'content/eus/rhel9/9.8/ppc64le/appstream/source/SRPMS',
'content/eus/rhel9/9.8/s390x/appstream/debug',
'content/eus/rhel9/9.8/s390x/appstream/os',
'content/eus/rhel9/9.8/s390x/appstream/source/SRPMS',
'content/eus/rhel9/9.8/x86_64/appstream/debug',
'content/eus/rhel9/9.8/x86_64/appstream/os',
'content/eus/rhel9/9.8/x86_64/appstream/source/SRPMS'
],
'pkgs': [
{'reference':'libevent-devel-2.1.13-1.el9_8', 'sp':'8', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libevent-doc-2.1.13-1.el9_8', 'sp':'8', 'rpm_spec_vers_cmp':TRUE}
]
},
{
'release': '9',
'sp': '8',
'repo_relative_urls': [
'content/e4s/rhel9/9.8/aarch64/baseos/debug',
'content/e4s/rhel9/9.8/aarch64/baseos/os',
'content/e4s/rhel9/9.8/aarch64/baseos/source/SRPMS',
'content/e4s/rhel9/9.8/ppc64le/baseos/debug',
'content/e4s/rhel9/9.8/ppc64le/baseos/os',
'content/e4s/rhel9/9.8/ppc64le/baseos/source/SRPMS',
'content/e4s/rhel9/9.8/s390x/baseos/debug',
'content/e4s/rhel9/9.8/s390x/baseos/os',
'content/e4s/rhel9/9.8/s390x/baseos/source/SRPMS',
'content/e4s/rhel9/9.8/x86_64/baseos/debug',
'content/e4s/rhel9/9.8/x86_64/baseos/os',
'content/e4s/rhel9/9.8/x86_64/baseos/source/SRPMS',
'content/e6s/rhel9/9.8/aarch64/baseos/debug',
'content/e6s/rhel9/9.8/aarch64/baseos/os',
'content/e6s/rhel9/9.8/aarch64/baseos/source/SRPMS',
'content/e6s/rhel9/9.8/ppc64le/baseos/debug',
'content/e6s/rhel9/9.8/ppc64le/baseos/os',
'content/e6s/rhel9/9.8/ppc64le/baseos/source/SRPMS',
'content/e6s/rhel9/9.8/s390x/baseos/debug',
'content/e6s/rhel9/9.8/s390x/baseos/os',
'content/e6s/rhel9/9.8/s390x/baseos/source/SRPMS',
'content/e6s/rhel9/9.8/x86_64/baseos/debug',
'content/e6s/rhel9/9.8/x86_64/baseos/os',
'content/e6s/rhel9/9.8/x86_64/baseos/source/SRPMS',
'content/eus/rhel9/9.8/aarch64/baseos/debug',
'content/eus/rhel9/9.8/aarch64/baseos/os',
'content/eus/rhel9/9.8/aarch64/baseos/source/SRPMS',
'content/eus/rhel9/9.8/ppc64le/baseos/debug',
'content/eus/rhel9/9.8/ppc64le/baseos/os',
'content/eus/rhel9/9.8/ppc64le/baseos/source/SRPMS',
'content/eus/rhel9/9.8/s390x/baseos/debug',
'content/eus/rhel9/9.8/s390x/baseos/os',
'content/eus/rhel9/9.8/s390x/baseos/source/SRPMS',
'content/eus/rhel9/9.8/x86_64/baseos/debug',
'content/eus/rhel9/9.8/x86_64/baseos/os',
'content/eus/rhel9/9.8/x86_64/baseos/source/SRPMS'
],
'pkgs': [
{'reference':'libevent-2.1.13-1.el9_8', 'sp':'8', 'rpm_spec_vers_cmp':TRUE}
]
}
];
var applicable_repo_urls = rhel_determine_applicable_repository_urls(constraints:constraints);
if(applicable_repo_urls == RHEL_REPOS_NO_OVERLAP_MESSAGE) exit(0, RHEL_REPO_NOT_ENABLED);
var os_release = get_one_kb_item('installed_os/local/SSH/0/release');
var os_sp = get_one_kb_item('Host/*/minor_release');
var flag = 0;
var repo_relative_urls;
var reference;
var sp;
var _cpu;
var el_string;
var rpm_spec_vers_cmp;
var epoch;
var allowmaj;
var exists_check;
var cves;
foreach var constraint ( constraints ) {
# Check that the target release is equal to the affected release
if (!empty_or_null(constraint['release'])){
if (constraint['release'] != os_release) continue;
}
if (!empty_or_null(constraint['sp'])){
if (constraint['sp'] != os_sp) continue;
}
if (!empty_or_null(constraint['repo_relative_urls'])) repo_relative_urls = constraint['repo_relative_urls'];
foreach var pkg ( constraint['pkgs'] ) {
reference = NULL;
sp = NULL;
_cpu = NULL;
el_string = NULL;
rpm_spec_vers_cmp = NULL;
epoch = NULL;
allowmaj = NULL;
exists_check = NULL;
cves = NULL;
if (!empty_or_null(pkg['reference'])) reference = pkg['reference'];
if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];
if (!empty_or_null(pkg['cpu'])) _cpu = pkg['cpu'];
if (!empty_or_null(pkg['el_string'])) el_string = pkg['el_string'];
if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];
if (!empty_or_null(pkg['epoch'])) epoch = pkg['epoch'];
if (!empty_or_null(pkg['allowmaj'])) allowmaj = pkg['allowmaj'];
if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];
if (!empty_or_null(pkg['cves'])) cves = pkg['cves'];
if (reference &&
rhel_decide_repo_relative_url_check(required_repo_url_list:repo_relative_urls) &&
(applicable_repo_urls || (!exists_check || rpm_exists(rpm:exists_check))) &&
rpm_check(sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj, cves:cves)) flag++;
}
}
if (flag)
{
var extra = NULL;
if (isnull(applicable_repo_urls) || !applicable_repo_urls) extra = rpm_report_get() + redhat_report_repo_caveat();
else extra = rpm_report_get();
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : extra
);
exit(0);
}
else
{
var tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'libevent / libevent-devel / libevent-doc');
}
Data
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16 Sep 2026 00:00Current
CVSS 49.2
CVSS 3.18.4
EPSS0.00587
SSVC