High severity · published Aug 23, 2022
CVE-2021-3905
A memory leak was found in Open vSwitch (OVS) during userspace IP fragmentation processing
7.5
CVSS
2.1%
EPSS
No
On KEV
Description
A memory leak was found in Open vSwitch (OVS) during userspace IP fragmentation processing. An attacker could use this flaw to potentially exhaust available memory by keeping sending packet fragments.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.1% · higher than 82% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EL
Enterprise Linux Fast Datapath · Redhat
7.0; 8.0 · source: NVD
FE
Fedora · Fedoraproject
35 · source: NVD
OP
Openvswitch · Openvswitch
before 2.17.0 · source: NVD
UL
Ubuntu Linux · Canonical
21.10 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-3905
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-3905
Third Party Advisory
https://access.redhat.com/security/cve/CVE-2021-3905
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2019692
Exploit
https://github.com/openvswitch/ovs-issues/issues/226
Patch
https://github.com/openvswitch/ovs/commit/803ed12e31b0377c37d7aa8c94b3b92f2081e349
security.gentoo.org
https://security.gentoo.org/glsa/202311-16
Patch
https://ubuntu.com/security/CVE-2021-3905
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