CVE-2021-3537

Description

A vulnerability found in libxml2 in versions before 2.9.11 shows that it did not propagate errors while parsing XML mixed content, causing a NULL dereference. If an untrusted XML document was parsed in recovery mode and post-validated, the flaw could be used to crash the application. The highest threat from this vulnerability is to system availability.

Category

5.9
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.13%
Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org
Affected: n/a libxml2
Published at:
Updated at:

References

Link Tags
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QVM4UJ3376I6ZVOYMHBNX4GY3NIV52WV/ vendor advisory
https://lists.debian.org/debian-lts-announce/2021/05/msg00008.html third party advisory mailing list
https://bugzilla.redhat.com/show_bug.cgi?id=1956522 issue tracking third party advisory patch
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BZOMV5J4PMZAORVT64BKLV6YIZAFDGX6/ vendor advisory
https://security.gentoo.org/glsa/202107-05 third party advisory vendor advisory
https://security.netapp.com/advisory/ntap-20210625-0002/ third party advisory
https://www.oracle.com/security-alerts/cpuoct2021.html third party advisory patch
https://www.oracle.com/security-alerts/cpuapr2022.html third party advisory patch
https://www.oracle.com/security-alerts/cpujul2022.html not applicable

Frequently Asked Questions

What is the severity of CVE-2021-3537?
CVE-2021-3537 has been scored as a medium severity vulnerability.
How to fix CVE-2021-3537?
To fix CVE-2021-3537, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-3537 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-3537 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-3537?
CVE-2021-3537 affects n/a libxml2.
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