CVE-2021-3517 @ morris

"CVE-2021-3517"
"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-libxml2-devel-2.10.2-9.el7"
"ea-libxml2-2.15.4-1.el7.cloudlinux"
"Am I vulnerable?"

Status

new

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

2026-10-15T10:20:42Z

Updated

2026-10-20T10:18:50Z

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-libxml2-devel-2.10.2-9.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

Same product CVEs in your queue

Other open tickets that look like the same product. Closed tickets are omitted unless they are already pegged to this CVE.

CVE	CVSS	Systems	Status	Matched	Already related
CVE-2021-3518	8.8	Archive, Janus, Library, Saiph, morris …	new	libxml2-devel	—
CVE-2022-40304	7.8	Archive, Janus, Library, Saiph, morris …	new	libxml2-devel	—
CVE-2024-34459	7.5	Archive, Janus, Library, Saiph, morris …	new	libxml2-devel	—
CVE-2022-23308	7.5	Archive, Janus, Library, Saiph, morris …	new	libxml2-devel	—
CVE-2022-40303	7.5	Archive, Janus, Library, Saiph, morris …	new	libxml2-devel	—
CVE-2024-25062	7.5	Archive, Janus, Library, Saiph, morris …	new	libxml2-devel	—

Related CVE (same fix)

Point this ticket’s CVE at a higher-priority / same-fix primary so you only triage one.

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
mufasa	new	8.1	2026-10-20T10:18:50Z	Open
Library	new	2.08	2026-10-20T10:18:50Z	Open
Archive	new	0.79	2026-10-20T10:18:50Z	Open
Janus	new	0.79	2026-10-20T10:18:50Z	Open
Saiph	new	0.79	2026-10-20T10:18:50Z	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

References

NVD: CVE-2021-3517