RockyLinux 8 : libevent (RLSA-2026:67908)

critical Nessus Plugin ID 346838

Synopsis

The remote RockyLinux host is missing one or more security updates.

Description

The remote RockyLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:67908 advisory.

* 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: 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)

Tenable has extracted the preceding description block directly from the RockyLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

Plugin Details

Severity: Critical

ID: 346838

File Name: rocky_linux_RLSA-2026-67908.nasl

Version: 1.1

Type: Local

Family: Rocky Linux Local Security Checks

Published: 9/17/2026

Updated: 9/17/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.17

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 6.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:C

CVSS Score Source: CVE-2026-63387

CVSS v3

Risk Factor: High

Base Score: 8.4

Temporal Score: 7.3

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS Score Source: CVE-2026-63388

CVSS v4

Risk Factor: Critical

Base Score: 9.2

Threat Score: 7.1

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:L/SI:L/SA:N

CVSS Score Source: CVE-2026-63385

Vulnerability Information

CPE: cpe:/o:rocky:linux:8, p-cpe:/a:rocky:linux:libevent-debuginfo, p-cpe:/a:rocky:linux:libevent-debugsource, p-cpe:/a:rocky:linux:libevent-devel, p-cpe:/a:rocky:linux:libevent-doc, p-cpe:/a:rocky:linux:libevent

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/RockyLinux/release, Host/RockyLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 9/17/2026

Vulnerability Publication Date: 8/20/2026

Reference Information

CVE: CVE-2026-63382, CVE-2026-63383, CVE-2026-63384, CVE-2026-63385, CVE-2026-63387, CVE-2026-63388

Detections

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