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    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.

    Published:Feb 23, 2021
    Last Modified:May 5, 2025
    EPS:Jul 20, 2021
    EPSS Score:0.00104
    CVSS Score:5.5

    Affected Products

    Vendor
    Openvswitch
    Product
    Openvswitch
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Openshift

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-416 Use After Free

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-31679 (CVSS 7.1) — In the Linux kernel, the following vulnerability has been resolved: openvswitch: validate MPLS set/set_masked…
    CVE-2023-3966 (CVSS 7.5) — A flaw was found in Open vSwitch where multiple versions are vulnerable to crafted Geneve packets, which may r…
    CVE-2024-22563 (CVSS 7.5) — openvswitch 2.17.8 was discovered to contain a memory leak via the function xmalloc__ in openvswitch-2.17.8/li…
    CVE-2023-5366 (CVSS 7.1) — A flaw was found in Open vSwitch that allows ICMPv6 Neighbor Advertisement packets between virtual machines to…
    CVE-2022-4337 (CVSS 9.8) — An out-of-bounds read in Organization Specific TLV was found in various versions of OpenvSwitch.…
    CVE-2022-4338 (CVSS 9.8) — An integer underflow in Organization Specific TLV was found in various versions of OpenvSwitch.…
    CVE-2019-25076 (CVSS 5.8) — The TSS (Tuple Space Search) algorithm in Open vSwitch 2.x through 2.17.2 and 3.0.0 allows remote attackers to…
    CVE-2022-0669 (CVSS 6.5) — A flaw was found in dpdk. This flaw allows a malicious vhost-user master to attach an unexpected number of fds…
    CVE-2021-3905 (CVSS 7.5) — A memory leak was found in Open vSwitch (OVS) during userspace IP fragmentation processing. An attacker could …
    CVE-2020-35498 (CVSS 7.5) — A vulnerability was found in openvswitch. A limitation in the implementation of userspace packet parsing can a…

    References

    https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=27851
    https://github.com/google/oss-fuzz-vulns/blob/main/vulns/openvswitch/OSV-2020-2197.yaml
    https://github.com/openvswitch/ovs/commit/38744b1bcb022c611712527f039722115300f58f
    https://github.com/openvswitch/ovs/commit/65c61b0c23a0d474696d7b1cea522a5016a8aeb3
    https://github.com/openvswitch/ovs/commit/6d67310f4d2524b466b98f05ebccc1add1e8cf35
    https://github.com/openvswitch/ovs/commit/77cccc74deede443e8b9102299efc869a52b65b2
    https://github.com/openvswitch/ovs/commit/8ce8dc34b5f73b30ce0c1869af9947013c3c6575
    https://github.com/openvswitch/ovs/commit/9926637a80d0d243dbf9c49761046895e9d1a8e2
    https://security.gentoo.org/glsa/202311-16
    https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=27851
    https://github.com/google/oss-fuzz-vulns/blob/main/vulns/openvswitch/OSV-2020-2197.yaml
    https://github.com/openvswitch/ovs/commit/38744b1bcb022c611712527f039722115300f58f
    https://github.com/openvswitch/ovs/commit/65c61b0c23a0d474696d7b1cea522a5016a8aeb3
    https://github.com/openvswitch/ovs/commit/6d67310f4d2524b466b98f05ebccc1add1e8cf35
    https://github.com/openvswitch/ovs/commit/77cccc74deede443e8b9102299efc869a52b65b2
    https://github.com/openvswitch/ovs/commit/8ce8dc34b5f73b30ce0c1869af9947013c3c6575
    https://github.com/openvswitch/ovs/commit/9926637a80d0d243dbf9c49761046895e9d1a8e2
    https://security.gentoo.org/glsa/202311-16

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High