CVE-2021-3517 @ mufasa

Status

not_applicable

Priority

8.1

Match score

4.0

Risk

DoS Remote

CVSS

8.6 HIGH

Reason

cpe: libxml2; pkgs: libxml2, libxml2-devel, libxml2-python; version: in-range: libxml2-2.9.1-6.0.13.el7_9.6.tuxcare.els2, libxml2-devel-2.9.1-6.0.13.el7_9.6.tuxcare.els2, libxml2-python-2.9.1-6.0.13.el7_9.6.tuxcare.els2; risk:dos

Created

2026-10-20T18:18:18Z

Updated

2026-10-20T19:09:19Z

Closed

2026-10-20T18:38:24Z

Package interrogation (copy)

Run on the host — click to copy a command. RPM

Package	Commands
libxml2-2.9.1-6.0.13.el7_9.6.tuxcare.els2
libxml2-devel-2.9.1-6.0.13.el7_9.6.tuxcare.els2
libxml2-python-2.9.1-6.0.13.el7_9.6.tuxcare.els2
alt-libxml2-2.10.2-9.el7
alt-python27-libxml2-2.9.2-4.1.el7
ea-libxml2-2.15.4-1.el7.cloudlinux

Inventory lookup

Search package inventory across systems, then return here. Create a ticket on systems the matcher missed.

Suggestions: libxml2 · libxml2-devel · libxml2-python

System	Matches	Ticket for CVE-2021-3517
morris	alt-libxml2-devel 2.10.2; libxml2-devel 2.9.1	not_applicable open
mufasa	libxml2-devel 2.9.1	not_applicable open

Related CVE (same fix)

This CVE is subordinated to primary CVE-2021-3518 — same product as CVE-2021-3518

Host OS / kernel

CloudLinux release 7.9 (Boris Yegorov) (7.9) · cloudlinux

Arch

x86_64

kernel_release

uname -r → 3.10.0-962.3.2.lve1.5.89.el7.x86_64

kernel_version

uname -v → #1 SMP Thu Jul 9 15:55:31 UTC 2026

For Linux kernel CVEs, kernel_version (Debian packaging / build string) often decides fixed vs not; kernel_release is used for upstream NVD range compares.

Same CVE on other hosts

Open the ticket for this CVE on another system.

System	Status	Priority	Updated
morris	not_applicable	8.1	2026-10-20T19:09:19Z	Open
Library	not_applicable	2.08	2026-10-20T19:09:19Z	Open
Archive	not_applicable	0.79	2026-10-20T19:09:19Z	Open
Janus	not_applicable	0.79	2026-10-20T19:09:19Z	Open
Saiph	not_applicable	0.79	2026-10-20T19:09:19Z	Open

Description

There is a flaw in the xml entity encoding functionality of libxml2 in versions before 2.9.11. An attacker who is able to supply a crafted file to be processed by an application linked with the affected functionality of libxml2 could trigger an out-of-bounds read. The most likely impact of this flaw is to application availability, with some potential impact to confidentiality and integrity if an attacker is able to use memory information to further exploit the application.

Update status

Add note only