SUSE-SU-2026:20061-1

Vulnerability from csaf_suse - Published: 2026-01-08 14:43 - Updated: 2026-09-16 19:25
Summary
Security update for openvswitch
Severity
Important
Notes
Title of the patch: Security update for openvswitch
Description of the patch: This update for openvswitch fixes the following issues: Update OpenvSwitch to v3.1.7 and OVN to v23.03.3: Security issues fixed: - CVE-2023-3966: ovs: invalid memory access and potential denial of service via specially crafted Geneve packets (bsc#1219465). - CVE-2023-5366: ovs: OpenFlow rules may be bypassed via specially crafted ICMPv6 Neighbor Advertisement packets sent between virtual machines t(bsc#1216002). - CVE-2024-2182: ovn: denial of service via injection of specially crafted BFD packets from inside unprivileged workloads (bsc#1255435). - CVE-2025-0650: ovn: egress ACLs may be bypassed via specially crafted UDP packet (bsc#1236353). Other updates and bugfixes: - OpenvSwitch upstream bugfix updates: * https://www.openvswitch.org/releases/NEWS-3.1.7.txt * v3.1.7 - Bug fixes - OVS validated with DPDK 22.11.7. * v3.1.6 - Bug fixes - OVS validated with DPDK 22.11.6. * v3.1.5 - Bug fixes - OVS validated with DPDK 22.11.5. * v3.1.4 - Bug fixes - OVS validated with DPDK 22.11.4. - OVN upstream bugfix updates: * https://github.com/ovn-org/ovn/blob/branch-23.03/NEWS * v23.03.3 - Bug fixes - Add "garp-max-timeout-sec" config option to vswitchd external-ids to cap the time between when ovn-controller sends gARP packets. * v23.03.1 - Bug fixes - CT entries are not flushed by default anymore whenever a load balancer backend is removed. A new, per-LB, option 'ct_flush' can be used to restore the previous behavior. Disabled by default. - Always allow IPv6 Router Discovery, Neighbor Discovery, and Multicast Listener Discovery protocols, regardless of ACLs defined. - Send ICMP Fragmentation Needed packets back to offending ports when communicating with multichassis ports using frames that don't fit through a tunnel. This is done only for logical switches that are attached to a physical network via a localnet port, in which case multichassis ports may have an effective MTU different from regular ports and hence may need this mechanism to maintain connectivity with other peers in the network. - ECMP routes use L4_SYM dp-hash by default if the datapath supports it. Existing sessions might get re-hashed to a different ECMP path when OVN detects the algorithm support in the datapath during an upgrade or restart of ovn-controller.
Patchnames: SUSE-SLE-Micro-6.1-367
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
CVE-2023-3966
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Product Identifier Version Remediation
Unresolved product id: SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_2.1.aarch64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_2.1.ppc64le —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_2.1.s390x —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_2.1.x86_64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_2.1.aarch64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_2.1.ppc64le —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_2.1.s390x —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_2.1.x86_64 —
Vendor Fix
Threats
Impact important
CVE-2023-5366
7.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
Affected products
Recommended 8 products, the same list as for CVE-2023-3966
Threats
Impact important
CVE-2024-2182
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected products
Recommended 8 products, the same list as for CVE-2023-3966
Threats
Impact moderate
CVE-2025-0650
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Recommended 8 products, the same list as for CVE-2023-3966
Threats
Impact important
References
To clipboard 

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  "vulnerabilities": [
    {
      "cve": "CVE-2023-3966",
      "ids": [
        {
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          "text": "https://www.suse.com/security/cve/CVE-2023-3966"
        }
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        {
          "category": "general",
          "text": "A flaw was found in Open vSwitch where multiple versions are vulnerable to crafted Geneve packets, which may result in a denial of service and invalid memory accesses. Triggering this issue requires that hardware offloading via the netlink path is enabled.",
          "title": "CVE description"
        }
      ],
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      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2023-3966",
          "url": "https://www.suse.com/security/cve/CVE-2023-3966"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1219465 for CVE-2023-3966",
          "url": "https://bugzilla.suse.com/1219465"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
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        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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            "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_2.1.s390x",
            "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_2.1.x86_64",
            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_2.1.aarch64",
            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_2.1.ppc64le",
            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_2.1.s390x",
            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_2.1.x86_64"
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        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-01-08T14:43:50Z",
          "details": "important"
        }
      ],
      "title": "CVE-2023-3966"
    },
    {
      "cve": "CVE-2023-5366",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2023-5366"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "A flaw was found in Open vSwitch that allows ICMPv6 Neighbor Advertisement packets between virtual machines to bypass OpenFlow rules. This issue may allow a local attacker to create specially crafted packets with a modified or spoofed target IP address field that can redirect ICMPv6 traffic to arbitrary IP addresses.",
          "title": "CVE description"
        }
      ],
      "product_status": {
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          "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_2.1.s390x",
          "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_2.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2023-5366",
          "url": "https://www.suse.com/security/cve/CVE-2023-5366"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1216002 for CVE-2023-5366",
          "url": "https://bugzilla.suse.com/1216002"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_2.1.aarch64",
            "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_2.1.ppc64le",
            "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_2.1.s390x",
            "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_2.1.x86_64",
            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_2.1.aarch64",
            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_2.1.ppc64le",
            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_2.1.s390x",
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        {
          "cvss_v3": {
            "baseScore": 7.1,
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      "title": "CVE-2023-5366"
    },
    {
      "cve": "CVE-2024-2182",
      "ids": [
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          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2024-2182"
        }
      ],
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        {
          "category": "general",
          "text": "A flaw was found in the Open Virtual Network (OVN). In OVN clusters where BFD is used between hypervisors for high availability, an attacker can inject specially crafted BFD packets from inside unprivileged workloads, including virtual machines or containers, that can trigger a denial of service.",
          "title": "CVE description"
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          "category": "external",
          "summary": "CVE-2024-2182",
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        },
        {
          "category": "external",
          "summary": "SUSE Bug 1255435 for CVE-2024-2182",
          "url": "https://bugzilla.suse.com/1255435"
        }
      ],
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          "cvss_v3": {
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            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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      "title": "CVE-2024-2182"
    },
    {
      "cve": "CVE-2025-0650",
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          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2025-0650"
        }
      ],
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        {
          "category": "general",
          "text": "A flaw was found in the Open Virtual Network (OVN). Specially crafted UDP packets may bypass egress access control lists (ACLs) in OVN installations configured with a logical switch with DNS records set on it and if the same switch has any egress ACLs configured. This issue can lead to unauthorized access to virtual machines and containers running on the OVN network.",
          "title": "CVE description"
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            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_2.1.aarch64",
            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_2.1.ppc64le",
            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_2.1.s390x",
            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_2.1.x86_64"
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      ],
      "scores": [
        {
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            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
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            "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_2.1.aarch64",
            "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_2.1.ppc64le",
            "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_2.1.s390x",
            "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_2.1.x86_64",
            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_2.1.aarch64",
            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_2.1.ppc64le",
            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_2.1.s390x",
            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_2.1.x86_64"
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      "threats": [
        {
          "category": "impact",
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          "details": "important"
        }
      ],
      "title": "CVE-2025-0650"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.