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Linux Distros Unpatched Vulnerability : CVE-2026-28532

high Nessus Plugin ID 311657

Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

 - FRRouting before 10.5.3 contains an integer overflow vulnerability in seven OSPF Traffic Engineering and Segment Routing TLV parser functions where a uint16_t accumulator variable truncates uint32_t values returned by the TLV_SIZE() macro, causing the loop termination condition to fail while pointer advancement continues unchecked. Attackers with an established OSPF adjacency can send a crafted LS Update packet with a malicious Type 10 or Type 11 Opaque LSA to trigger out-of-bounds memory reads and crash all affected routers in the OSPF area or autonomous system. (CVE-2026-28532)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2026-28532

https://security-tracker.debian.org/tracker/CVE-2026-28532

Plugin Details

Severity: High

ID: 311657

File Name: unpatched_CVE_2026_28532.nasl

Version: 1.2

Type: Local

Agent: unix

Family: Misc.

Published: 5/2/2026

Updated: 5/2/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 4.3

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

CVSS Score Source: CVE-2026-28532

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.9

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

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, p-cpe:/a:redhat:enterprise_linux:frr10, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:centos:centos:frr-selinux, p-cpe:/a:centos:centos:frr, cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:debian:debian_linux:frr, p-cpe:/a:redhat:enterprise_linux:frr-selinux, p-cpe:/a:redhat:enterprise_linux:frr-contrib, p-cpe:/a:centos:centos:frr10, cpe:/o:centos:centos:8, p-cpe:/a:centos:centos:frr-contrib, p-cpe:/a:redhat:enterprise_linux:frr, cpe:/o:debian:debian_linux:12.0, cpe:/o:redhat:enterprise_linux:10, cpe:/o:debian:debian_linux:13.0

Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 4/30/2026

Reference Information

CVE: CVE-2026-28532