CVE-2021-36980

Name: CVE-2021-36980
Creator: NVD / NIST
Published: 2021-07-20T07:15:08.113+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 1.18%

Last modified Jun 17, 2026

CVE-2021-36980 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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.. EPSS estimates a 1.18% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS Probability

1.18%

63.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Openvswitch	Openvswitch	>= 2.11.0, <= 2.15.0

References

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=27851Patch, Third Party Advisory
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/openvswitch/OSV-2020-2197.yamlThird Party Advisory
https://github.com/openvswitch/ovs/commit/38744b1bcb022c611712527f039722115300f58fPatch, Third Party Advisory
https://github.com/openvswitch/ovs/commit/65c61b0c23a0d474696d7b1cea522a5016a8aeb3Patch, Third Party Advisory
https://github.com/openvswitch/ovs/commit/6d67310f4d2524b466b98f05ebccc1add1e8cf35Patch, Third Party Advisory
https://github.com/openvswitch/ovs/commit/77cccc74deede443e8b9102299efc869a52b65b2Patch, Third Party Advisory
https://github.com/openvswitch/ovs/commit/8ce8dc34b5f73b30ce0c1869af9947013c3c6575Patch, Third Party Advisory
https://github.com/openvswitch/ovs/commit/9926637a80d0d243dbf9c49761046895e9d1a8e2Patch, Third Party Advisory
https://security.gentoo.org/glsa/202311-16
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=27851Patch, Third Party Advisory
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/openvswitch/OSV-2020-2197.yamlThird Party Advisory
https://github.com/openvswitch/ovs/commit/38744b1bcb022c611712527f039722115300f58fPatch, Third Party Advisory
https://github.com/openvswitch/ovs/commit/65c61b0c23a0d474696d7b1cea522a5016a8aeb3Patch, Third Party Advisory
https://github.com/openvswitch/ovs/commit/6d67310f4d2524b466b98f05ebccc1add1e8cf35Patch, Third Party Advisory
https://github.com/openvswitch/ovs/commit/77cccc74deede443e8b9102299efc869a52b65b2Patch, Third Party Advisory
https://github.com/openvswitch/ovs/commit/8ce8dc34b5f73b30ce0c1869af9947013c3c6575Patch, Third Party Advisory
https://github.com/openvswitch/ovs/commit/9926637a80d0d243dbf9c49761046895e9d1a8e2Patch, Third Party Advisory
https://security.gentoo.org/glsa/202311-16

Timeline

Published: Jul 20, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is 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.

How severe is CVE-2021-36980?

CVE-2021-36980 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 1.18% probability of exploitation in the next 30 days.

How do I fix CVE-2021-36980?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-36980?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST