Vulnerability in Openvswitch
CVE-2021-3905
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.021 (81.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 81.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.020 · newest: 0.021 · change: +0.001
Affected products
- Openvswitch
- Canonical Ubuntu Linux — versions 21.10
- Fedoraproject Fedora — versions 35
- Red Hat Enterprise Linux Fast Datapath — versions 7.0, 8.0
- Openvswitch (Ovs) — versions Fixed in v2.17.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- access.redhat.com/security/cve/CVE-2021-3905 (Third Party Advisory)
- ubuntu.com/security/CVE-2021-3905 (Patch, Third Party Advisory)
- github.com/openvswitch/ovs-issues/issues/226 (Exploit, Patch, Third Party Advisory, Issue Tracking)
- github.com/openvswitch/ovs/commit/803ed12e31b0377c37d7aa8c94b3b92f2081e349 (Patch, Third Party Advisory)
- security.gentoo.org/glsa/202311-16 (vendor-advisory)
Frequently asked questions
- What is CVE-2021-3905?
- CVE-2021-3905 is a high-severity vulnerability in Openvswitch, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 7.5/10. Published 2022-08-23.
- How severe is CVE-2021-3905?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-3905 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.