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 | libxml2-python 2.9.1 | not_applicable open | |
| mufasa | libxml2-python 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
OS
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_64kernel_version
uname -v → #1 SMP Thu Jul 9 15:55:31 UTC 2026For 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.
Determination
Related to primary CVE-2021-3518: same product as CVE-2021-3518
Update status
Add note only
Mitigation log
2026-10-20T18:38:24Z — not_applicable
Related to primary CVE-2021-3518: same product as CVE-2021-3518
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1954232
- https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
- https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2021/05/msg00008.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BZOMV5J4PMZAORVT64BKLV6YIZAFDGX6/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QVM4UJ3376I6ZVOYMHBNX4GY3NIV52WV/
- https://security.gentoo.org/glsa/202107-05
- https://security.netapp.com/advisory/ntap-20210625-0002/
- https://security.netapp.com/advisory/ntap-20211022-0004/
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1954232
- https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
NVD: CVE-2021-3517