5.5

CVE-2021-36980: openvswitch Use After Free

Modified
AliasesSUSE-SU-2022:3098-1SUSE-SU-2022:3099-1SUSE-SU-2022:3116-1
Published 20-07-2021Last modified 05-05-2025

Vulnerability summary

CVE-2021-36980 is a medium (CVSS 5.5) Use After Free vulnerability in openvswitch. EPSS estimates a 1.18% chance of exploitation in the next 30 days, higher than 67.8% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
1.18%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3 · Related 2
RHSA-2021:3758SUSE-SU-2023:1795-1SUSE-SU-2023:2360-1

Timeline

  1. 20-07-2021
    PublishedVulnerability first disclosed.
  2. 05-05-2025
    Last modifiedVulnerability information updated.

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.

CVSS metrics

7 scores · 6 sources · 2 versions

EPSS trend

Probability

1.18%

Chance of exploitation in the next 30 days

Percentile

68%

Versus all other CVEs

30-day change

No change 0.00 pp

From 1.18% on 05-10-2026

05-10-202604-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.

Redhat27 products
  • network-scripts-openvswitch2.11< 0:2.11.3-86.el8fdp
  • network-scripts-openvswitch2.13< 0:2.13.0-114.el8fdp
  • network-scripts-openvswitch2.15< 0:2.15.0-24.el8fdp
  • openvswitch2.11< 0:2.11.3-86.el8fdp | < 0:2.11.3-89.el7fdp
  • openvswitch2.11-debuginfo< 0:2.11.3-86.el8fdp | < 0:2.11.3-89.el7fdp
Suse6 products
  • openvswitch&distro=SUSE Linux Enterprise Module for Package Hub 15 SP3< 2.14.2-150300.19.3.1
  • openvswitch&distro=SUSE Linux Enterprise Module for Package Hub 15 SP4< 2.14.2-150400.24.3.1
  • openvswitch&distro=SUSE Linux Enterprise Module for Server Applications 15 SP3< 2.14.2-150300.19.3.1
  • openvswitch&distro=SUSE Linux Enterprise Module for Server Applications 15 SP4< 2.14.2-150400.24.3.1
  • openvswitch&distro=SUSE Linux Enterprise Server 12 SP5< 2.11.5-3.6.1
Opensuse3 products
  • openvswitch&distro=openSUSE Leap 15.3< 2.13.2-150200.9.17.1 | < 2.14.2-150300.19.3.1
  • openvswitch&distro=openSUSE Leap 15.4< 2.13.2-150200.9.17.1 | < 2.14.2-150400.24.3.1
  • openvswitch&distro=openSUSE Tumbleweed< 2.17.0-12.1
Alpine1 product
  • openvswitch≥ 2.11.0, < 2.12.3-r2
Debian1 product
  • openvswitch< 2.15.0+ds1-10
Openvswitch1 product
Ubuntu1 product
  • openvswitch< 2.13.3-0ubuntu0.20.04.2

7 vendors · 40 products

References

45 links
Show all 45 references