Detections
Analytics
Linux Distros Unpatched Vulnerability : CVE-2026-15813
medium Nessus Plugin ID 327974
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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.- A vulnerability was found in the network packet de-fragmentation engine of kronosnet (Version affected <= 1.34). The internal reassembly code does not properly validate sequence numbers of incoming payload fragments. An attacker can exploit this lack of verification by transmitting malformed packets with corrupted sequence parameters. Under specific conditions, this forces the packet processing layer to parse data outside the designated bounds of the internal memory structures, causing an out-of-bounds memory access or heap corruption. This behavior can result in sudden application crashes or system instability.
(CVE-2026-15813)
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-2026-15813
Plugin Details
Severity: Medium
ID: 327974
File Name: unpatched_CVE_2026_15813.nasl
Version: 1.6
Type: Local
Agent: unix
Family: Misc.
Published: 7/20/2026
Updated: 7/30/2026
Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5.5
Percentile: 96.29
CVSS v2
Risk Factor: Medium
Base Score: 6.1
Temporal Score: 5.2
Vector: CVSS2#AV:N/AC:H/Au:N/C:N/I:P/A:C
CVSS Score Source: CVE-2026-15813
CVSS v3
Risk Factor: Medium
Base Score: 6.5
Temporal Score: 6
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
Temporal Vector: CVSS:3.0/E:U/RL:U/RC:C
Vulnerability Information
CPE: cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, cpe:/o:canonical:ubuntu_linux:26.04:-:lts, cpe:/o:centos:centos:8, cpe:/o:debian:debian_linux:11.0, cpe:/o:debian:debian_linux:12.0, cpe:/o:debian:debian_linux:13.0, cpe:/o:debian:debian_linux:14.0, cpe:/o:redhat:enterprise_linux:10, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:canonical:ubuntu_linux:kronosnet, p-cpe:/a:centos:centos:libknet1-compress-bzip2-plugin, p-cpe:/a:centos:centos:libknet1-compress-lz4-plugin, p-cpe:/a:centos:centos:libknet1-compress-lzma-plugin, p-cpe:/a:centos:centos:libknet1-compress-lzo2-plugin, p-cpe:/a:centos:centos:libknet1-compress-plugins-all, p-cpe:/a:centos:centos:libknet1-compress-zlib-plugin, p-cpe:/a:centos:centos:libknet1-compress-zstd-plugin, p-cpe:/a:centos:centos:libknet1-crypto-nss-plugin, p-cpe:/a:centos:centos:libknet1-crypto-openssl-plugin, p-cpe:/a:centos:centos:libknet1-crypto-plugins-all, p-cpe:/a:centos:centos:libknet1-devel, p-cpe:/a:centos:centos:libknet1-plugins-all, p-cpe:/a:centos:centos:libknet1, p-cpe:/a:centos:centos:libnozzle1, p-cpe:/a:debian:debian_linux:kronosnet, p-cpe:/a:redhat:enterprise_linux:libknet1-compress-bzip2-plugin, p-cpe:/a:redhat:enterprise_linux:libknet1-compress-lz4-plugin, p-cpe:/a:redhat:enterprise_linux:libknet1-compress-lzma-plugin, p-cpe:/a:redhat:enterprise_linux:libknet1-compress-lzo2-plugin, p-cpe:/a:redhat:enterprise_linux:libknet1-compress-plugins-all, p-cpe:/a:redhat:enterprise_linux:libknet1-compress-zlib-plugin, p-cpe:/a:redhat:enterprise_linux:libknet1-compress-zstd-plugin, p-cpe:/a:redhat:enterprise_linux:libknet1-crypto-nss-plugin, p-cpe:/a:redhat:enterprise_linux:libknet1-crypto-openssl-plugin, p-cpe:/a:redhat:enterprise_linux:libknet1-crypto-plugins-all, p-cpe:/a:redhat:enterprise_linux:libknet1-devel, p-cpe:/a:redhat:enterprise_linux:libknet1-plugins-all, p-cpe:/a:redhat:enterprise_linux:libknet1, p-cpe:/a:redhat:enterprise_linux:libnozzle1
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: 7/20/2026
Reference Information
CVE: CVE-2026-15813