CVE-2021-3518 @ mufasa
Status
does_not_affect
Priority
8.8
Match score
4.0
Risk
MemCorrupt
Remote
priv:user
CVSS
8.8 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:memory_corruption
Created
2026-10-20T18:18:18Z
Updated
2026-10-20T19:09:19Z
Closed
2026-10-20T18:38:42Z
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-2021-3518 | |
|---|---|---|---|
| morris | libxml2-python 2.9.1 | does_not_affect open | |
| mufasa | libxml2-python 2.9.1 | does_not_affect open |
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 | KEV | Systems | Status | Matched | Already related | |
|---|---|---|---|---|---|---|---|
| CVE-2021-3517 | 8.6 | Archive, Janus, Library, Saiph, morris … | not_applicable | libxml2-devel | → CVE-2021-3518 | linked here | |
| CVE-2022-40304 | 7.8 | Archive, Janus, Library, Saiph, morris … | not_applicable | libxml2-devel | → CVE-2021-3518 | linked here | |
| CVE-2024-34459 | 7.5 | Archive, Janus, Library, Saiph, morris … | not_applicable | libxml2-devel | → CVE-2021-3518 | linked here | |
| CVE-2022-23308 | 7.5 | Archive, Janus, Library, Saiph, morris … | not_applicable | libxml2-devel | → CVE-2021-3518 | linked here | |
| CVE-2022-40303 | 7.5 | Archive, Janus, Library, Saiph, morris … | not_applicable | libxml2-devel | → CVE-2021-3518 | linked here | |
| CVE-2024-25062 | 7.5 | Archive, Janus, Library, Saiph, morris … | not_applicable | libxml2-devel | → CVE-2021-3518 | linked here |
Related CVE (same fix)
Point this ticket’s CVE at a higher-priority / same-fix primary so you only triage one.
Other CVEs related to this one as primary:
| Related CVE | Note | Tickets |
|---|---|---|
| CVE-2021-3517 | same product as CVE-2021-3518 | morris, mufasa, Library, Archive, Janus, Saiph |
| CVE-2022-23308 | same product as CVE-2021-3518 | morris, mufasa, Library, Archive, Janus, Saiph |
| CVE-2022-40303 | same product as CVE-2021-3518 | morris, mufasa, Library, Archive, Janus, Saiph |
| CVE-2022-40304 | same product as CVE-2021-3518 | morris, mufasa, Library, Archive, Janus, Saiph |
| CVE-2024-25062 | same product as CVE-2021-3518 | morris, mufasa, Library, Archive, Janus, Saiph |
| CVE-2024-34459 | same product as CVE-2021-3518 | morris, mufasa, Library, Archive, Janus, Saiph |
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 | does_not_affect | 8.8 | 2026-10-20T19:09:19Z | Open |
| Library | does_not_affect | 2.64 | 2026-10-20T19:09:19Z | Open |
| Archive | does_not_affect | 1.32 | 2026-10-20T19:09:19Z | Open |
| Janus | does_not_affect | 1.32 | 2026-10-20T19:09:19Z | Open |
| Saiph | does_not_affect | 1.32 | 2026-10-20T19:09:19Z | Open |
Description
There's a flaw in libxml2 in versions before 2.9.11. An attacker who is able to submit a crafted file to be processed by an application linked with libxml2 could trigger a use-after-free. The greatest impact from this flaw is to confidentiality, integrity, and availability.
Determination
rpm -q --changelog libxml2 | grep -i 3518 | head - CVE-2021-3518: fix dangling pointers in entity reference nodes
Update status
Add note only
Mitigation log
2026-10-20T18:38:42Z — does_not_affect
rpm -q --changelog libxml2 | grep -i 3518 | head
- CVE-2021-3518: fix dangling pointers in entity reference nodes
References
- http://seclists.org/fulldisclosure/2021/Jul/54
- http://seclists.org/fulldisclosure/2021/Jul/55
- http://seclists.org/fulldisclosure/2021/Jul/58
- http://seclists.org/fulldisclosure/2021/Jul/59
- https://bugzilla.redhat.com/show_bug.cgi?id=1954242
- 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://support.apple.com/kb/HT212601
- https://support.apple.com/kb/HT212602
- https://support.apple.com/kb/HT212604
NVD: CVE-2021-3518