RHEL 9 : openssl (RHSA-2026:98484)

low Nessus Plugin ID 378793

Synopsis

The remote Red Hat host is missing one or more security updates.

Description

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:98484 advisory.

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library.

Security Fix(es):

* openssl: openssl: Denial of Service via excessive memory allocation in CRL distribution point processing (CVE-2026-35189)

* openssl: openssl: Denial of Service via excessive QUIC packet buffer retention (CVE-2026-54873)

* openssl: openssl: Denial of Service via crafted CMP certificate revocation response (CVE-2026-75805)

* openssl: openssl: Denial of Service via inefficient QUIC stream reassembly (CVE-2026-42772)

* openssl: OpenSSL: Private key recovery via timing side-channel in generic elliptic curve operations (CVE-2026-54872)

* openssl: OpenSSL: Denial of Service via unenforced QUIC connection flow control (CVE-2026-75804)

* openssl: openssl: information disclosure via non-constant-time SM2 scalar multiplication on ARM64 and RISC-V (CVE-2026-54875)

* openssl: openssl: Traffic amplification Denial of Service via QUIC packet over-accounting (CVE-2026-35191)

* openssl: OpenSSL: Private key recovery via SM2 timing side-channel (CVE-2026-77696)

* openssl: openssl: Denial of Service via out-of-bounds write during TLS context switch (CVE-2026-72897)

* openssl: OpenSSL: Denial of Service via undersized DTLS record (CVE-2026-75806)

* openssl: OpenSSL: Denial of Service via unbounded QUIC connection identifier backlog (CVE-2026-84784)

Bug Fix(es) and Enhancement(s):

* [RHEL 9.9] OpenSSL silently uses default provider when `fips.so` is missing on systems in FIPS mode (JIRA:RHEL-239862)

* OpenSSL fails to initialize when automatic initialization happens in threads [RHEL 9] (JIRA:RHEL-256385)

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.

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 openssl-devel and / or openssl-perl packages.

Plugin Details

Severity: Low

ID: 378793

File Name: redhat-RHSA-2026-98484.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Red Hat Local Security Checks

Published: 11/11/2026

Updated: 11/11/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.8

Percentile: 96.1

Vendor

Vendor Severity: Moderate

CVSS v2

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4

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

CVSS Score Source: CVE-2026-77696

CVSS v3

Risk Factor: Low

Base Score: 3.7

Temporal Score: 3.2

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

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

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:redhat:enterprise_linux:openssl-devel, p-cpe:/a:redhat:enterprise_linux:openssl-libs, p-cpe:/a:redhat:enterprise_linux:openssl-perl, p-cpe:/a:redhat:enterprise_linux:openssl

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

Exploit Ease: No known exploits are available

Patch Publication Date: 11/11/2026

Vulnerability Publication Date: 9/29/2026

Reference Information

CVE: CVE-2026-35189, CVE-2026-35191, CVE-2026-42772, CVE-2026-54872, CVE-2026-54873, CVE-2026-54875, CVE-2026-72897, CVE-2026-75804, CVE-2026-75805, CVE-2026-75806, CVE-2026-77696, CVE-2026-84784

CWE: 1284, 208, 407, 440, 476, 770, 787

RHSA: 2026:98484

Detections

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