Use After Free in Openvswitch
CVE-2021-36980
Open vSwitch (aka openvswitch) 2.11.0 through 2.15.0 has a use-after-free in decode_NXAST_RAW_ENCAP (called from ofpact_decode and ofpacts_decode) during the decoding of a RAW_ENCAP action.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.012 (66.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 66.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/google/oss-fuzz-vulns/blob/main/vulns/openvswitch/OSV-2020-2197.yaml (Third Party Advisory)
- bugs.chromium.org/p/oss-fuzz/issues/detail (Patch, Third Party Advisory)
- github.com/openvswitch/ovs/commit/77cccc74deede443e8b9102299efc869a52b65b2 (Patch, Third Party Advisory)
- github.com/openvswitch/ovs/commit/38744b1bcb022c611712527f039722115300f58f (Patch, Third Party Advisory)
- github.com/openvswitch/ovs/commit/65c61b0c23a0d474696d7b1cea522a5016a8aeb3 (Patch, Third Party Advisory)
- github.com/openvswitch/ovs/commit/6d67310f4d2524b466b98f05ebccc1add1e8cf35 (Patch, Third Party Advisory)
- github.com/openvswitch/ovs/commit/8ce8dc34b5f73b30ce0c1869af9947013c3c6575 (Patch, Third Party Advisory)
- github.com/openvswitch/ovs/commit/9926637a80d0d243dbf9c49761046895e9d1a8e2 (Patch, Third Party Advisory)
- security.gentoo.org/glsa/202311-16 (vendor-advisory)
Frequently asked questions
- What is CVE-2021-36980?
- CVE-2021-36980 is a medium-severity vulnerability in Openvswitch, classified under Use After Free. CVSS score: 5.5/10. Published 2021-07-20.
- How severe is CVE-2021-36980?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2021-36980 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.