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SUSE-SU-2026:23188-1

Vulnerability from csaf_suse - Published: 2026-08-17 16:50 - Updated: 2026-09-16 20:12
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: - CVE-2026-5265: heap over-read in ICMP error response generation (bsc#1262498). - CVE-2026-5367: heap over-read in OVN DHCPv6 client ID processing (bsc#1262499).
Patchnames: SUSE-SLE-Micro-6.1-673
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-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
Product Identifier Version Remediation
Unresolved product id: SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_4.1.aarch64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_4.1.ppc64le —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_4.1.s390x —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_4.1.x86_64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_4.1.aarch64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_4.1.ppc64le —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_4.1.s390x —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_4.1.x86_64 —
Vendor Fix
Threats
Impact important
CVE-2026-5265
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected products
Recommended 8 products, the same list as for CVE-2025-0650
Threats
Impact important
CVE-2026-5367
6.5 (Medium)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected products
Recommended 8 products, the same list as for CVE-2025-0650
Threats
Impact moderate
References
To clipboard 

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  "vulnerabilities": [
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          "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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          "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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        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-5265"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "When generating an ICMP Destination Unreachable or Packet Too Big response, the handler copies a portion of the original packet into the ICMP error body using the IP header\u0027s self-declared total length (ip_tot_len for IPv4, ip6_plen for IPv6) without validating it against the actual packet buffer size. A VM can send a short packet with an inflated IP length field that triggers an ICMP error (e.g., by hitting a reject ACL), causing ovn-controller to read heap memory beyond the valid packet data and include it in the ICMP response sent back to the VM.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_4.1.aarch64",
          "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_4.1.ppc64le",
          "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_4.1.s390x",
          "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_4.1.x86_64",
          "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_4.1.aarch64",
          "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_4.1.ppc64le",
          "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_4.1.s390x",
          "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_4.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-5265",
          "url": "https://www.suse.com/security/cve/CVE-2026-5265"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1262498 for CVE-2026-5265",
          "url": "https://bugzilla.suse.com/1262498"
        }
      ],
      "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_4.1.aarch64",
            "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_4.1.ppc64le",
            "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_4.1.s390x",
            "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_4.1.x86_64",
            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_4.1.aarch64",
            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_4.1.ppc64le",
            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_4.1.s390x",
            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_4.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_4.1.aarch64",
            "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_4.1.ppc64le",
            "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_4.1.s390x",
            "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_4.1.x86_64",
            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_4.1.aarch64",
            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_4.1.ppc64le",
            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_4.1.s390x",
            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_4.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-08-17T16:50:12Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-5265"
    },
    {
      "cve": "CVE-2026-5367",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-5367"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "A flaw was found in OVN (Open Virtual Network). A remote attacker, by sending crafted DHCPv6 (Dynamic Host Configuration Protocol for IPv6) SOLICIT packets with an inflated Client ID length, could cause the ovn-controller to read beyond the bounds of a packet. This out-of-bounds read can lead to the disclosure of sensitive information stored in heap memory, which is then returned to the attacker\u0027s virtual machine port.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_4.1.aarch64",
          "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_4.1.ppc64le",
          "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_4.1.s390x",
          "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_4.1.x86_64",
          "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_4.1.aarch64",
          "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_4.1.ppc64le",
          "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_4.1.s390x",
          "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_4.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-5367",
          "url": "https://www.suse.com/security/cve/CVE-2026-5367"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1262499 for CVE-2026-5367",
          "url": "https://bugzilla.suse.com/1262499"
        }
      ],
      "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_4.1.aarch64",
            "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_4.1.ppc64le",
            "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_4.1.s390x",
            "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_4.1.x86_64",
            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_4.1.aarch64",
            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_4.1.ppc64le",
            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_4.1.s390x",
            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_4.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_4.1.aarch64",
            "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_4.1.ppc64le",
            "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_4.1.s390x",
            "SUSE Linux Micro 6.1:libopenvswitch-3_1-0-3.1.7-slfo.1.1_4.1.x86_64",
            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_4.1.aarch64",
            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_4.1.ppc64le",
            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_4.1.s390x",
            "SUSE Linux Micro 6.1:openvswitch-3.1.7-slfo.1.1_4.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-08-17T16:50:12Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2026-5367"
    }
  ]
}



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Tags
Taxonomy of the tags.





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

Author Source Type Date Other

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.


Detection rules are retrieved from Rulezet.


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.