CVE-2022-0897
low-risk
Published 2022-03-25
A flaw was found in the libvirt nwfilter driver. The virNWFilterObjListNumOfNWFilters method failed to acquire the driver->nwfilters mutex before iterating over virNWFilterObj instances. There was no protection to stop another thread from concurrently modifying the driver->nwfilters object. This flaw allows a malicious, unprivileged user to exploit this issue via libvirt's API virConnectNumOfNWFilters to crash the network filter management daemon (libvirtd/virtnwfilterd).
Do I need to act?
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0.08% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.3/10
Medium
NETWORK
/ LOW complexity
Affected Products (2)
References (6)
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2063883
Third Party Advisory
https://security.gentoo.org/glsa/202210-06
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2063883
Third Party Advisory
https://security.gentoo.org/glsa/202210-06
25
/ 100
low-risk
Severity
18/34 · Moderate
Exploitability
0/34 · Minimal
Exposure
7/34 · Low